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Souissi A, Farjallah MA, Gaied Chortane O, Dergaa I, Mejri MA, Gaamouri N, Souissi N, Souissi N, Chamari K, Weiss K, Ben Saad H, Ghram A, Knechtle B. The effects of daytime melatonin ingestion on arousal and vigilance vanish after sub-maximal exercise: a pilot study. Eur Rev Med Pharmacol Sci 2022; 26:6065-6072. [PMID: 36111906 DOI: 10.26355/eurrev_202209_29622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE Daytime melatonin ingestion is known to induce sleep at rest, which may affect arousal and vigilance. Physical exercise is known to produce an increase in core temperature and circulating cortisol which can enhance arousal and vigilance. The effect of submaximal exercise on vigilance and arousal following acute melatonin ingestion has not yet been studied. The present study aimed at investigating the effect of submaximal exercise on vigilance and arousal following daytime melatonin ingestion. PATIENTS AND METHODS Eight physical education students undertook 45 min of submaximal exercise (at 60% of maximal aerobic speed) on a treadmill after melatonin-(6 mg) or placebo ingestion, in a randomized and counterbalanced order. RESULTS Heart rate (HR), rectal temperature (Tre), felt arousal scale (FAS), and thermal sensations (TS) were recorded at baseline (pre-exercise), immediately after exercise (post-exercise), and after 30 min of recovery (30 min post-exercise). Blood was sampled for lactate and cortisol. At 30 min post-exercise, the Tre, HR, blood pressure, lactate, FAS, and TS were measured. The participants performed vigilance tests pre-exercise, post-exercise and 30 min post-exercise. Daytime melatonin ingestion affected arousal and vigilance in the pre-exercise period (p < 0.05) but had no effect on Tre, HR, blood pressure, lactate, TS, arousal, and vigilance measured 30 min post-exercise (p > 0.05). CONCLUSIONS The negative effects of melatonin ingestion on vigilance and arousal vanished after a 45 min of submaximal exercise. The hypnotic effect of melatonin observed in the pre-exercise dissipated in the post-exercise period, possibly due to the significant elevation of Tre, HR, and cortisol at the end of submaximal exercise.
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Affiliation(s)
- A Souissi
- Université de Sousse, Faculté de Médecine de Sousse, Hôpital Farhat HACHED, Laboratoire de Recherche (Insuffisance Cardiaque, LR12SP09), Sousse, Tunisia.
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2
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Rouissi M, Turki O, Bragazzi N, Owen A, Haddad M, Chamari K, Chtara M. Effect of post-activation potentiation induced by one, two or three half-squats on repeated sprint acceleration performance. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.01.2018.05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M. Rouissi
- Department of Sports and Physical Activities, Higher Institute od Sport and Physical Education of Ksar Said, Manouba, Tunisia
| | - O. Turki
- Department of Sports and Physical Activities, Higher Institute od Sport and Physical Education of Ksar Said, Manouba, Tunisia
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports, Tunis, Tunisia
| | - N.L. Bragazzi
- School of Public Health, Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy
| | - A. Owen
- BenficaLAB, SL Benfica, Lisbon, Portugal
- Centre de Recherche et d'Innovation sur le Sport, Universitè Claude Bernard, Lyon, France
| | - M. Haddad
- Sport Science Program, College of Arts and Scence, Qatar University, Doha, Qatar
| | - K. Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - M. Chtara
- Department of Sports and Physical Activities, Higher Institute od Sport and Physical Education of Ksar Said, Manouba, Tunisia
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports, Tunis, Tunisia
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3
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Bisciotti G, Chamari K, Cena E, Carimati G, Volpi P. ACL injury in football: a literature overview of the prevention programs. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.04.2016.08] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- G.N. Bisciotti
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - K. Chamari
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - E. Cena
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - G. Carimati
- Department of Knee Orthopedic and Sports Traumatology Unit, Humanitas Research Hospital. Rozzano (MI), Italy
| | - P. Volpi
- Department of Knee Orthopedic and Sports Traumatology Unit, Humanitas Research Hospital. Rozzano (MI), Italy
- FC Internazionale Medical Staff. Milano, Italy
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Padulo J, Chaabène H, Tabben M, Haddad M, Gevat C, Vando S, Maurino L, Chaouachi A, Chamari K. The construct validity of session RPE during an intensive camp in young male Karate athletes. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.02.2014.05] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J. Padulo
- Sport Science, University e-Campus, Novedrate, Italy
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport (CNMSS), Tunis, Tunisia
| | - H. Chaabène
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport (CNMSS), Tunis, Tunisia
- ISSEP Ksar-Saïd, Manouba University, Tunisia
| | - M. Tabben
- CETAPS, Rouen University, Rouen, France
| | - M. Haddad
- Sport Science Program, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - C. Gevat
- Ovidius University of Constanta, Romania
| | - S. Vando
- Faculty of Medicine and Surgery, University of “Tor Vergata” Rome, Italy
| | - L. Maurino
- Italian Federation Martial Art, Rome, Italy
| | - A. Chaouachi
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - K. Chamari
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport, Tunis, Tunisia
- Athlete Health and Performance Research Centre, ASPETAR, Qatar; Orthopaedic and Sports Medicine Hospital, Doha, Qatar
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Padulo J, Chamari K, Concu A, Dal Pupo J, Laffaye G, Moura Zagatto A, Ardigò L. Concentric and eccentric: muscle contraction or exercise? New perspective. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.02.2014.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- J. Padulo
- Sport Science, University e-Campus, Novedrate, Italy
- Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - K. Chamari
- Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - A. Concu
- Department of Medical Sciences, Sports Physiology Lab, University of Cagliari, Italy
| | - J. Dal Pupo
- Center of Sports, Federal University of Santa Catarina Florianópolis, Santa Caterina, Brazil
| | - G. Laffaye
- UR CIAMS – Motor Control and Perception Group, Sport Sciences Department, Bot, Universitè Paris, France
| | - A. Moura Zagatto
- Department of Physical Education, São Paulo State University, Brazil
| | - L.P. Ardigò
- School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Italy
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6
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Affiliation(s)
- J. Padulo
- Sport Science, University e-Campus, Novedrate, Italy
- Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - K. Chamari
- Tunisian Research Laboratory “Sports Performance Optimization”, National Center of Medicine and Science in Sport, Tunis, Tunisia
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - L.P. Ardigò
- School of Exercise and Sport Science, Department of Neurological and Movement Sciences, University of Verona, Italy
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di Vico R, Ardigò L, Salernitano G, Chamari K, Padulo J. The acute effect of the tongue position in the mouth on knee isokinetic test performance: a highly surprising pilot study. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.04.2013.13] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- R. di Vico
- Italian Society of Posture and Gait Research, Caserta, Italy
| | - L.P. Ardigò
- School of Exercise and Sport Science, University of Verona, Italy
| | - G. Salernitano
- Italian Society of Posture and Gait Research, Caserta, Italy
| | - K. Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar. Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - J. Padulo
- Italian Society of Posture and Gait Research, Caserta, Italy; Tunisian Research Laboratory ‘Sports Performance Optimization’, National Center of Medicine and Science in Sport, Tunis, Tunisia
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Volpi P, Bisciotti G, Chamari K, Cena E, Carimati G, Bragazzi N. Risk factors of anterior cruciate ligament injury in football players: a systematic review of the literature. Muscles Ligaments Tendons J 2019. [DOI: 10.32098/mltj.04.2016.09] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- P. Volpi
- Department of Knee Orthopedic and Sports Traumatology Unit, Humanitas Research Hospital. Rozzano (MI), Italy
- FC Internazionale Medical Staff. Milano, Italy
| | - G.N. Bisciotti
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - K. Chamari
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - E. Cena
- Qatar Orthopaedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - G. Carimati
- Department of Knee Orthopaedic and Sports Traumatology Unit, Humanitas Research Hospital, Rozzano, (MI), Italy
| | - N.L. Bragazzi
- Department of Health Sciences (DISSAL), University of Genoa, Italy
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Farjallah MA, Hammouda O, Zouch M, Ghattassi K, Graja A, Driss T, Chamari K, Souissi N. Effect of melatonin ingestion on physical performance, metabolic responses, and recovery after an intermittent training session. Physiol Int 2018; 105:358-370. [DOI: 10.1556/2060.105.2018.4.24] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Objectives
Fatigue is a limiting factor for sport performance. For this reason, optimal recovery after training is just as critical as the training program itself, if not more. Indeed, there is a need for strategies that can facilitate recovery after training, and one such strategy is the ingestion of supplements like melatonin (MEL). This study aimed to evaluate if MEL intake could improve recovery of athletes after an intermittent training session (ITS).
Methods
Fifteen elite female athletes (17.4 ± 0.4 years, 76.4 ± 5.6 kg, 1.76 ± 0.04 m; mean ± standard deviation) participated in two testing campaigns. During each period, they performed a battery of physical and cognitive tests before and after an ITS, as well as after ingesting MEL (6 mg tablet) or placebo in a randomized design. The ITS comprised the modified agility T-test, squat jump, counter movement jump, maximum standing ball-throw velocity test, maximum jump ball-throw velocity test, and 20-m sprint. Oral temperature (OT) and vigilance were evaluated before and after the ITS. Rating of perceived exertion (RPE), blood lactate [La], and glucose [Gl] were recorded after each ITS.
Results
Short-term performance, recovery of physical performance, and OT were not affected by MEL ingestion after the ITS. Moreover, MEL did not affect cognitive performance or RPE scores after the ITS. However, [La] and [Gl] (p < 0.05 for both) were decreased after MEL ingestion.
Conclusion
MEL has no effect on the recovery of physical performance but may affect glucose utilization and lactate metabolism during the team-handball training session.
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Affiliation(s)
- MA Farjallah
- 1 High Institute of Sport and Physical Education, Manouba University, Manouba, Tunisia
| | - O Hammouda
- 2 Research Center on Sport and Movement (Centre de Recherches sur le Sport et le Mouvement, CeRSM), UPL, Université Paris Nanterre, UFR STAPS, Nanterre, France
| | - M Zouch
- 3 Research Unit: Education, Motricity, Sport and Health, UR15JS01, High Institute of Sport and Physical Education of Sfax, Sfax University, Sfax, Tunisia
| | - K Ghattassi
- 1 High Institute of Sport and Physical Education, Manouba University, Manouba, Tunisia
| | - A Graja
- 1 High Institute of Sport and Physical Education, Manouba University, Manouba, Tunisia
| | - T Driss
- 2 Research Center on Sport and Movement (Centre de Recherches sur le Sport et le Mouvement, CeRSM), UPL, Université Paris Nanterre, UFR STAPS, Nanterre, France
| | - K Chamari
- 4 Athlete Health and Performance Research Center ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - N Souissi
- 5 National Observatory of Sport, Tunis, Tunisia
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Cherif M, Chtourou H, Souissi N, Aouidet A, Chamari K. Maximal power training induced different improvement in throwing velocity and muscle strength according to playing positions in elite male handball players. Biol Sport 2017; 33:393-398. [PMID: 28090144 PMCID: PMC5143774 DOI: 10.5604/20831862.1224096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 08/22/2014] [Accepted: 02/09/2016] [Indexed: 11/23/2022] Open
Abstract
This study was designed to assess the effect of strength and power training on throwing velocity and muscle strength in handball players according to their playing positions. Twenty-two male handball players were assigned to either an experimental group (n=11) or a control group (n=11) (age: 22.1 ± 3.0 years). They were asked to complete (i) the ball throwing velocity test and (ii) the one-repetition maximum (1-RM) tests for the half-back squat, the pull-over, the bench press, the developed neck, and the print exercises before and after 12 weeks of maximal power training. The training was designed to improve strength and power with an intensity of 85-95% of the 1RM. In addition to their usual routine handball training sessions, participants performed two sessions per week. During each session, they performed 3-5 sets of 3-8 repetitions with 3 min of rest in between. Then, they performed specific shots (i.e., 12 to 40). Ball-throwing velocity (p<0.001) was higher after the training period in rear line players (RL). The training programme resulted in an improvement of 1RM bench press (p<0.001), 1RM developed neck (p<0.001) and 1RM print (p<0.001) in both front line (FL) and RL. The control group showed a significant improvement only in ball-throwing velocity (p<0.01) and 1RM bench press (p<0.01) in RL. A significantly greater improvement was found in ball-throwing velocity (p<0.001), 1RM bench press (p<0.001), and 1RM half-back squat exercises in players of the central axis (CA) compared to the lateral axis (LA) (p<0.01). The power training programme induced significantly greater increases in ball-throwing velocity and muscle strength in FL than RL and in CA than LA axis players.
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Affiliation(s)
- M Cherif
- Higher Institute of Sport and Physical Education of Ksar Said, University of Manouba, Tunis, Tunisia; Research Laboratory ''Sport Performance Optimization'' National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - H Chtourou
- Research Laboratory ''Sport Performance Optimization'' National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - N Souissi
- Higher Institute of Sport and Physical Education of Ksar Said, University of Manouba, Tunis, Tunisia; Research Laboratory ''Sport Performance Optimization'' National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - A Aouidet
- High School of Science and Technology Health of Tunis, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
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Garbouj H, Selmi MA, Sassi RH, Yahmed MH, Chamari K, Chaouachi A. Do maximal aerobic power and blood lactate concentration affect Specific Judo Fitness Test performance in female judo athletes? Biol Sport 2017; 33:367-372. [PMID: 28090141 PMCID: PMC5143773 DOI: 10.5604/20831862.1221890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/01/2015] [Accepted: 09/16/2016] [Indexed: 11/21/2022] Open
Abstract
The Special Judo Fitness Test (SJFT) has become the test most widely used by coaches and physical trainers for assessment of competitors’ judo-specific physical aptitude and training programme prescription. The aim of this study was to investigate the relationship between the SJFT performance indices and both maximal aerobic power and the level of blood lactate concentrations in female judo athletes. Seventeen female judokas (age: 21.9±1.6 years, body mass: 74.6±27.4 kg, height: 164.5±8.6 cm; BMI: 27.1±8.0 kg · m-2) took part in this study. All participants performed the SJFT, 20 m multi-stage shuttle run test (MSRT), and 30 m straight sprint test (SST), from which we calculated both acceleration (10 m) and the maximal anaerobic speed (MAnS: flying 20 m sprint). A blood sample was taken 3 min after the SJFT. The number of throws was significantly correlated with estimated VO2max (r=0.795, p=0.0001) and both acceleration (r=0.63, p =0.006) and MAnS (r=0.76, p=0.0004). Peak blood lactate recorded after the SJFT was 13.90±1.39 mmol · l-1. No significant correlation was found between blood lactate concentration and the SJFT performance indices. The lack of significant correlation between blood lactate and SJFT performance suggests that lactic anaerobic metabolism has no effect on this type of judo-specific supra-maximal exercise. The observed results can provide coaches and strength and conditioning professionals with relevant information for the interpretation of SJFT performance and the prescription of specific training programmes for female judo athletes.
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Affiliation(s)
- H Garbouj
- Tunisian Research Laboratory "Sport Performance Optimisation'", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - M A Selmi
- Tunisian Research Laboratory "Sport Performance Optimisation'", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - R Haj Sassi
- Tunisian Research Laboratory "Sport Performance Optimisation'", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - M Haj Yahmed
- Research Unit ''Analysis and Evaluation of Factors Affecting the Sports Performance'', High Institute of Sports and Physical Education, Ksar Said, University of Manouba, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - A Chaouachi
- Tunisian Research Laboratory "Sport Performance Optimisation'", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia; AUT University, Sports Performance Research Institute New Zealand, Auckland, New Zealand
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Aloui A, Chtourou H, Briki W, Tabben M, Chaouachi A, Souissi N, Shephard RJ, Chamari K. Rapid weight loss in the context of Ramadan observance: recommendations for judokas. Biol Sport 2017; 33:407-413. [PMID: 28090146 PMCID: PMC5143776 DOI: 10.5604/20831862.1224098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 08/27/2015] [Accepted: 10/26/2016] [Indexed: 11/13/2022] Open
Abstract
Judo is a weight-classified combat sport, and many athletes seek to compete at the lightest possible weight category to gain an advantage from competing against shorter/smaller, and supposedly weaker opponents. To achieve a desired weight, most judokas opt for rapid weight loss techniques. Short-duration maximal efforts are not greatly affected by “making weight”, but prolonged and/or repeated exercise is significantly impaired. Negative effects on mood, ratings of perceived exertion, and cognitive function are also reported. Moreover, rapid weight loss reduces maximal cardiac output and glycogen stores, and impairs thermo-regulation. Limited empirical data suggest that Ramadan reduces judokas’ performance, and this is likely to be exacerbated by attempts at rapid weight loss. Weight reduction during Ramadan tends to be counterproductive, and judokas who aim for a lower weight category are advised to attempt any desired reduction of body mass during the weeks leading up to Ramadan, rather than during the holy month.
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Affiliation(s)
- A Aloui
- High Institute of Sport and Physical Education, University of Gafsa, Gafsa, Tunisia
| | - H Chtourou
- Research Unit: Education, Motricité, Sport et Santé, UR15JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Tunisia
| | - W Briki
- Qatar University, College of Arts and Sciences, Sport Science Program, Doha, Qatar
| | - M Tabben
- CETAPS, University of Rouen, Mont Saint Aignan, France
| | - A Chaouachi
- Research Laboratory "Sport Performance Optimization", National Centre of Medicine and Sciences in Sport, Tunis, Tunisia
| | - N Souissi
- National Observatory on Sport, Tunis, Tunisia
| | - R J Shephard
- Faculty of Kinesiology & Physical Education, University of Toronto, Toronto, Canada
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
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Chamari K, Cherif A, Ryu J, Fenneni M, Farooq A, Meeusen R, Roelands B. Three-days of Islamic intermittent fasting negatively impact repeated-sprints performance of active young healthy adults. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.01.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Padulo J, Ardigò LP, Attene G, Cava C, Wong DP, Chamari K, Migliaccio GM. The effect of slope on repeated sprint ability in young soccer players. Res Sports Med 2016; 24:320-330. [PMID: 27537203 DOI: 10.1080/15438627.2016.1222276] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study aimed to describe a gradient repeated sprint ability (RSA) test in comparison with a standard level one by investigating performance, metabolic demand and muscular jumping performance as a proxy for running mechanics. Eighteen athletes performed two level RSA tests (40 m × 6) - for reliability evaluation - and one ±5% gradient RSA test, second leg downhill (RSAgrad). Rating of perceived exertion (RPE), blood lactate concentration (BLa) concentration, vertical jump heights were assessed as well. Level test measures resulted highly reliable (Intra-class correlation coefficient (ICC) ≥0.96). RSAgrad worsened only first sprints' performance (-2%) but not overall test performance (~45 s). RSAgrad resulted to be less deteriorating in terms of fatigue index (FI) (-36%), BLa (-23%), RPE (-11%), jumping performance (RSAgrad post-/pre-squat jump, countermovement jump heights (CMJh): -3%, -6%, respectively). RSAgrad could be used to diversify common training protocol without stressing excessively athletes' current metabolic-anaerobic capacity. Such physical conditioning procedures could improve acceleration/braking capability.
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Affiliation(s)
- J Padulo
- a University eCampus , Novedrate , Italy.,b Tunisian Research Laboratory 'Sports Performance Optimization' , National Center of Medicine and Science in Sports , Tunis , Tunisia.,c Sardinia Committee , Italian National Olympic Committee, Sardinia Committee , Cagliari , Italy
| | - L P Ardigò
- d School of Exercise and Sport Science, Department of Neurological, Biomedical and Movement Sciences , University of Verona , Verona , Italy
| | - G Attene
- c Sardinia Committee , Italian National Olympic Committee, Sardinia Committee , Cagliari , Italy.,e School of Medicine and Surgery , University of Cagliari , Cagliari , Italy
| | - C Cava
- c Sardinia Committee , Italian National Olympic Committee, Sardinia Committee , Cagliari , Italy
| | - D P Wong
- f Human Performance Laboratory , Technological and Higher Education Institute of Hong Kong , Hong Kong , China.,g Sports & Recreation Research Centre , Technological and Higher Education Institute of Hong Kong , Hong Kong , China
| | - K Chamari
- h Athlete Health and Performance Research Centre Aspetar , Qatar Orthopaedic and Sports Medicine Hospital , Doha , Qatar
| | - G M Migliaccio
- c Sardinia Committee , Italian National Olympic Committee, Sardinia Committee , Cagliari , Italy.,i Performance Research , Sport Science Lab Ltd , London , UK
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Chaalali A, Rouissi M, Chtara M, Owen A, Bragazzi NL, Moalla W, Chaouachi A, Amri M, Chamari K. Agility training in young elite soccer players: promising results compared to change of direction drills. Biol Sport 2016; 33:345-351. [PMID: 28090138 PMCID: PMC5143769 DOI: 10.5604/20831862.1217924] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 06/07/2016] [Accepted: 06/13/2016] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to compare the effect of two different training programmes – change of direction (COD) vs. agility (AG) – on straight sprint (SS), COD and AG test performances in young elite soccer players. Thirty-two soccer players (age: 14.5±0.9 years; height: 171.2±5.1 cm; body mass: 56.4±7.1 kg, body fat: 10.3±2.3%) participated in a short-term (6 weeks) training study. Players were randomly assigned to two experimental groups – training with change of direction drills (COD-G, n=11) or using agility training (AG-G, n= 11) – and to a control group (CON-G, n=10). All players completed the following tests before and after training: straight sprint (15m SS), 15 m agility run with (15m-AR-B) and without a ball (15m-AR), 5-0-5 agility test, reactive agility test (RAT), and RAT test with ball (RAT-B). A significant group effect was observed for all tests (p<0.001; η2=large). In 15m SS, COD-G and AG-G improved significantly (2.21; ES=0.57 and 2.18%; ES=0.89 respectively) more than CON-G (0.59%; ES=0.14). In the 15m-AR and 5-0-5 agility test, COD-G improved significantly more (5.41%; ES=1.15 and 3.41; ES=0.55 respectively) than AG-G (3.65%; ES=1.05 and 2.24; ES=0.35 respectively) and CON-G (1.62%; ES=0.96 and 0.97; ES=0.19 respectively). Improvements in RAT and RAT-B were larger (9.37%; ES=2.28 and 7.73%; ES=2.99 respectively) in RAT-G than the other groups. In conclusion, agility performance amongst young elite soccer could be improved using COD training. Nevertheless, including a conditioning programme for agility may allow a high level of athletic performance to be achieved.
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Affiliation(s)
- A Chaalali
- Tunisian Research Laboratory "Sport Performance Optimization", National Center of Medicine and Science in Sports Tunis, Tunisia
| | - M Rouissi
- Tunisian Research Laboratory "Sport Performance Optimization", National Center of Medicine and Science in Sports Tunis, Tunisia
| | - M Chtara
- Tunisian Research Laboratory "Sport Performance Optimization", National Center of Medicine and Science in Sports Tunis, Tunisia
| | - A Owen
- Servette Centre for Football Research (SCFR), Servette Football Club, Geneva, Switzerland; Centre de Recherche et d'Innovation sur le Sport, Université Claude Bernard Lyon.1, Lyon, France
| | - N L Bragazzi
- School of Public Health, Department of Health Sciences (DISSAL), University of Genoa, Genoa 16132, Italy
| | - W Moalla
- High Institute of Sports Sciences, UR EM2S-ISSEPS, Sfax, Tunisia
| | - A Chaouachi
- Tunisian Research Laboratory "Sport Performance Optimization", National Center of Medicine and Science in Sports Tunis, Tunisia
| | - M Amri
- Laboratory of Functional Neurophysiology and Pathology, Faculty of Sciences of Tunis (FST),University of El Manar, Tunisia; These two authors contributed equally to this work
| | - K Chamari
- Athlete Health and Performance Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar; These two authors contributed equally to this work
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Racil G, Coquart JB, Elmontassar W, Haddad M, Goebel R, Chaouachi A, Amri M, Chamari K. Greater effects of high- compared with moderate-intensity interval training on cardio-metabolic variables, blood leptin concentration and ratings of perceived exertion in obese adolescent females. Biol Sport 2016; 33:145-52. [PMID: 27274107 PMCID: PMC4885625 DOI: 10.5604/20831862.1198633] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 10/08/2015] [Accepted: 12/02/2015] [Indexed: 02/06/2023] Open
Abstract
This study examined the effects of high- vs. moderate-intensity interval training on cardiovascular fitness, leptin levels and ratings of perceived exertion (RPE) in obese female adolescents. Forty-seven participants were randomly assigned to one of three groups receiving either a 1:1 ratio of 15 s of effort comprising moderate-intensity interval training (MIIT at 80% maximal aerobic speed: MAS) or high-intensity interval training (HIIT at 100% MAS), with matched 15 s recovery at 50% MAS, thrice weekly, or a no-training control group. The HIIT and MIIT groups showed improved (p < 0.05) body mass (BM), BMI Z-score, and percentage of body fat (%BF). Only the HIIT group showed decreased waist circumference (WC) (p = 0.017). The effect of exercise on maximal oxygen uptake (VO2max) was significant (p = 0.019, ES = 0.48 and p = 0.010, ES = 0.57, HIIT and MIIT, respectively). The decrease of rate-pressure product (RPP) (p < 0.05, ES = 0.53 and ES = 0.46, HIIT and MIIT, respectively) followed the positive changes in resting heart rate and blood pressures. Blood glucose, insulin level and the homeostasis model assessment index for insulin decreased (p < 0.05) in both training groups. Significant decreases occurred in blood leptin (p = 0.021, ES = 0.67 and p = 0.011, ES = 0.73) and in RPE (p = 0.001, ES = 0.76 and p = 0.017, ES = 0.57) in HIIT and MIIT, respectively. In the post-intervention period, blood leptin was strongly associated with %BF (p < 0.001) and VO2max (p < 0.01) in the HIIT and MIIT groups, respectively, while RPE was strongly associated with BM (p < 0.01) in the HIIT group. The results suggest that high-intensity interval training may produce more positive effects on health determinants in comparison with the same training mode at a moderate intensity.
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Affiliation(s)
- G Racil
- Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - J B Coquart
- CETAPS, Faculty of Sport Sciences, University of Rouen, Mont Saint Aignan, France
| | - W Elmontassar
- Laboratory of Biomechanics and Biomaterials Research Applied to Orthopedics, National Institute of Orthopedics, Manouba, Tunisia
| | - M Haddad
- Sport Science Program, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - R Goebel
- Sport Science Program, College of Arts and Sciences, Qatar University, Doha, Qatar
| | - A Chaouachi
- Research Laboratory ''Sport Performance Optimization'', National Center of Medicine and Sciences in Sport (CNMSS),Tunis, Tunisia
| | - M Amri
- Department of Biological Sciences, Faculty of Science of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - K Chamari
- Athelte Health and Performance Research Centre, Aspetar, Qatar; Orthopedic and Sports Medicine Hospital, Doha, Qatar
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Zagatto AM, Papoti M, Da Silva A, Barbieri RA, Campos EZ, Ferreira EC, Loures JP, Chamari K. The Hoff circuit test is more specific than an incremental treadmill test to assess endurance with the ball in youth soccer players. Biol Sport 2016; 33:263-8. [PMID: 27601781 PMCID: PMC4993142 DOI: 10.5604/20831862.1201913] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 08/14/2015] [Accepted: 11/14/2015] [Indexed: 12/02/2022] Open
Abstract
The assessment of aerobic endurance is important for training prescription in soccer, and is usually measured by straight running without the ball on a track or treadmill. Due to the ball control and technical demands during a specific soccer test, the running speeds are likely to be lower compared to a continuous incremental test. The aim of the present study was to compare the heart rate (HR), rating of perceived exertion (RPE) and speeds corresponding to 2.0 mmol∙L-1, 3.5 mmol∙L-1, lactate threshold (Dmax method) and peak lactate determined in the laboratory and in the Hoff circuit soccer-specific test. Sixteen soccer players (16±1 years) underwent two incremental tests (laboratory and Hoff circuit tests). The speeds were significantly higher in the treadmill test than on the Hoff circuit (2.0 mmol∙L-1: 9.5±1.2 and 8.1±1.0 km∙h-1; 3.5 mmol∙L-1: 12.0±1.2 and 10.2±1.1 km∙h-1; Dmax: 11.4±1.4 and 9.3±0.4 km∙h-1; peak lactate: 14.9±1.6 and 10.9±0.8 km∙h-1). The HR corresponding to 3.5 mmol∙L-1 was significantly higher on the Hoff circuit compared to the laboratory test (187.5±18.0 and 178.2±17.6 bpm, respectively; P <0.001), while the RPE at the last incremental stage was lower on the Hoff circuit (P < 0.01). The speeds during the Hoff specific soccer test and the HR corresponding to 2.0 mmol∙L-1, 3.5 mmol∙L-1 and Dmax/threshold were different compared with the laboratory test. The present study shows that it is possible to assess submaximal endurance related variables specifically in soccer players.
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Affiliation(s)
- A M Zagatto
- UNESP - Univ Estadual Paulista, Physical Education Department, Bauru-SP, Brazil; Post-Graduation Program in Movement Science, UNESP - Univ Estadual Paulista - Rio Claro-SP, Brazil
| | - M Papoti
- School of Physical Education and Sports of Ribeirão Preto, São Paulo University, Ribeirão Preto-SP, Brazil
| | - Asr Da Silva
- School of Physical Education and Sports of Ribeirão Preto, São Paulo University, Ribeirão Preto-SP, Brazil
| | - R A Barbieri
- Post-Graduation Program in Movement Science, UNESP - Univ Estadual Paulista - Rio Claro-SP, Brazil
| | - E Z Campos
- Post-Graduation Program in Movement Science, UNESP - Univ Estadual Paulista - Rio Claro-SP, Brazil
| | - E C Ferreira
- Laboratory of Exercise Physiology (LAFE) - UNESP - Univ Estadual Paulista - Presidente Prudente-SP, Brazil
| | - J P Loures
- Post-Graduation Program in Movement Science, UNESP - Univ Estadual Paulista - Rio Claro-SP, Brazil
| | - K Chamari
- Athlete Health and Performance Research Centre, Aspetar, Doha, Qatar
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Bouaziz T, Makni E, Passelergue P, Tabka Z, Lac G, Moalla W, Chamari K, Elloumi M. Multifactorial monitoring of training load in elite rugby sevens players: cortisol/cortisone ratio as a valid tool of training load monitoring. Biol Sport 2016; 33:231-9. [PMID: 27601777 PMCID: PMC4993138 DOI: 10.5604/20831862.1201812] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Revised: 06/13/2015] [Accepted: 03/07/2016] [Indexed: 11/13/2022] Open
Abstract
The effectiveness of selected physiological and perceptual measures for monitoring training load and fatigue was studied in 16 male elite rugby sevens players during a 6-week intense training block (IT) and 2-week tapering (TAP). Daily training load (TL) and strain (TS) as well as weekly total score of fatigue (TSF) were quantified respectively by the session-rating of perceived exertion (RPE) method and an 8-item questionnaire. Also, testing was performed and 24 h urinary cortisol (C), cortisone (Cn), adrenaline (A) and noradrenalin (NA) excretion was measured before (T0) and after the IT (T1) and after the TAP (T2). The TL, TS and TSF increased during the IT and decreased during the TAP, in conjunction with a significant drop and improvement, respectively, of performance standards during the two periods. At T1, C and Cn levels increased while A and NA levels decreased, resulting in a higher C/Cn ratio and lower A/NA ratio, respectively. At T2, both C/Cn and A/NA returned to baseline values. The changes in C/Cn ratio, after the 6-week IT, were more closely related to mean TL, TS and TSF (r=0.75-0.76 vs. r=0.48-0.58, p<0.01) and to changes in the majority of performance measures than to A/NA ratio. Only the changes in C/Cn ratio after the 2-week TAP were related to mean TL, TS and TSF (r=0.61-0.68, p<0.01). The changes in hormone levels, training strain and performance standards reflected the physical and mental stressors of training, with complete recovery, as indicated by physiological homeostasis, achieved after an appropriate tapering period.
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Affiliation(s)
- T Bouaziz
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty de Medicine Ibn El Jazzar, Sousse, Tunisia
| | - E Makni
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty de Medicine Ibn El Jazzar, Sousse, Tunisia
| | - P Passelergue
- University of Pau et des Pays de l'Adour, LAPPS - E 4445, Tarbes, France
| | - Z Tabka
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty de Medicine Ibn El Jazzar, Sousse, Tunisia
| | - G Lac
- Blaise Pascal Clermont University, Laboratory AME2P, EA 3533, Clermont-Ferrand, France
| | - W Moalla
- University of Sfax, Research Unit EM2S, High Institute of Sport and Physical Education Sfax, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
| | - M Elloumi
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty de Medicine Ibn El Jazzar, Sousse, Tunisia; Blaise Pascal Clermont University, Laboratory AME2P, EA 3533, Clermont-Ferrand, France
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Fessi MS, Makni E, Jemni M, Elloumi M, Chamari K, Nabli MA, Padulo J, Moalla W. Reliability and criterion-related validity of a new repeated agility test. Biol Sport 2016; 33:159-64. [PMID: 27274109 PMCID: PMC4885627 DOI: 10.5604/20831862.1198635] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 05/19/2015] [Accepted: 12/01/2015] [Indexed: 01/08/2023] Open
Abstract
The study aimed to assess the reliability and the criterion-related validity of a new repeated sprint T-test (RSTT) that includes intense multidirectional intermittent efforts. The RSTT consisted of 7 maximal repeated executions of the agility T-test with 25 s of passive recovery rest in between. Forty-five team sports players performed two RSTTs separated by 3 days to assess the reliability of best time (BT) and total time (TT) of the RSTT. The intra-class correlation coefficient analysis revealed a high relative reliability between test and retest for BT and TT (>0.90). The standard error of measurement (<0.50) showed that the RSTT has a good absolute reliability. The minimal detectable change values for BT and TT related to the RSTT were 0.09 s and 0.58 s, respectively. To check the criterion-related validity of the RSTT, players performed a repeated linear sprint (RLS) and a repeated sprint with changes of direction (RSCD). Significant correlations between the BT and TT of the RLS, RSCD and RSTT were observed (p<0.001). The RSTT is, therefore, a reliable and valid measure of the intermittent repeated sprint agility performance. As this ability is required in all team sports, it is suggested that team sports coaches, fitness coaches and sports scientists consider this test in their training follow-up.
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Affiliation(s)
- M S Fessi
- UR15JS01 Education, Motricity, Sport and Health, High Institute of Sport and Physical Education, Sfax University, Tunisia
| | - E Makni
- UR15JS01 Education, Motricity, Sport and Health, High Institute of Sport and Physical Education, Sfax University, Tunisia
| | - M Jemni
- Department of Sport Science, College of Arts and Science, Qatar University, Doha, Qatar
| | - M Elloumi
- UR15JS01 Education, Motricity, Sport and Health, High Institute of Sport and Physical Education, Sfax University, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar
| | - M A Nabli
- National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - J Padulo
- University eCampus, Novedrate, Italy; University of Split, Faculty of kinesiology, Split, Croatia
| | - W Moalla
- UR15JS01 Education, Motricity, Sport and Health, High Institute of Sport and Physical Education, Sfax University, Tunisia
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20
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Hammami A, Chamari K, Slimani M, Shephard RJ, Yousfi N, Tabka Z, Bouhlel E. Effects of recreational soccer on physical fitness and health indices in sedentary healthy and unhealthy subjects. Biol Sport 2016; 33:127-37. [PMID: 27274105 PMCID: PMC4885622 DOI: 10.5604/20831862.1198209] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 10/27/2015] [Accepted: 12/12/2015] [Indexed: 11/18/2022] Open
Abstract
Recreational soccer (RS) is becoming a popular alternative to the classical continuous exercise mode used for the improvement of cardiovascular and metabolic fitness in untrained people. The objective of this paper was to conduct a detailed systematic review of the literature, identifying the physiological responses to RS and the training effects of RS on aerobic fitness and health in untrained healthy individuals and clinical patients. PubMed, Google Scholar and ScienceDirect databases were searched using terms related to recreational soccer. Inclusion criteria were randomized controlled trials (RCT) that assessed acute physiological responses to RS or the training effects of RS on physical fitness and health in sedentary, untrained subjects of any age or health status. All studies were assessed for methodological quality using the PEDro scale. Thirty-five articles met the inclusion criteria; seven examined the acute response to RS, and 28 assessed training effects. Clear evidence was found that RS had positive effects on many health-related indices and variables, including VO2max (gains of 7-16%), blood pressure (reductions of 6-13 mmHg), body composition (decreased fat mass and improved indices of bone health), and metabolic and cardiac function. These positive effects were observed in both healthy individuals and clinical patients, irrespective of age or sex. Although this review provides clear evidence of the positive effects of RS on health, most studies had limitations of methodology (an average PEDro score < 6). Furthermore, many of the training studies were from a small number of research groups. Future studies should be extended to other countries and institutions to ensure generality of the results. Regular RS training leads to significant cardiovascular and muscular adaptations and gains of health both in sedentary individuals and clinical patients at all ages, suggesting that RS is a potentially highly motivational method to enhance population health.
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Affiliation(s)
- A Hammami
- Laboratory of Physiology, Faculty of Medicine Sousse, Sousse, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - M Slimani
- Faculty of Sciences of Bizerte, Bizerte, Tunisia
| | - R J Shephard
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Ontario, Canada
| | - N Yousfi
- Research Laboratory "Sport Performance Optimization", National Center of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
| | - Z Tabka
- Laboratory of Physiology, Faculty of Medicine Sousse, Sousse, Tunisia
| | - E Bouhlel
- Laboratory of Physiology, Faculty of Medicine Sousse, Sousse, Tunisia
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Nassib S, Moalla W, Hammoudi-Nassib S, Chtara M, Hachana Y, Tabka Z, Chamari K, Elloumi M. The IGF-1/cortisol ratio as a useful marker for monitoring training in young boxers. Biol Sport 2016; 33:15-22. [PMID: 26985129 PMCID: PMC4786582 DOI: 10.5604/20831862.1180172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/30/2015] [Accepted: 05/05/2015] [Indexed: 11/29/2022] Open
Abstract
Training effects on plasma insulin-like growth factor-1 (IGF-1)/cortisol ratio were investigated in boxers. Thirty subjects were assigned to either the training or the control group (n = 15 in both). They were tested before the beginning of training (T0), after 5 weeks of intensive training (T1), and after 1 week of tapering (T2). Physical performances (Yo-Yo intermittent recovery test level-1), training loads, and blood sampling were obtained at T0, T1, and T2. Controls were only tested for biochemical and anthropometric parameters at T0 and T2. A significantly higher physical performance was observed at T2 compared to T1. At T1, cortisol levels were significantly increased whereas IGF-1 and insulin-like growth factor binding protein-3 (IGFBP-3) levels remained unchanged compared to baseline. At T2, cortisol levels decreased while IGF-1 and IGFBP-3 levels increased. The IGF-1/cortisol ratio decreased significantly at T1 and increased at T2, and its variations were significantly correlated with changes in training loads and Yo-Yo intermittent recovery test level 1 (IRT1) performance over the training period. Cortisol variations correlated with changes in training load (r = 0.64; p < 0.01) and Yo-Yo IRT1 performance (r = 0.78; p < 0.001) at T1 whereas IGF-1 variations correlated only with changes in Yo-Yo IRT1 performance at T2 (r = 0.71; p < 0.001). It is concluded that IGF-1/cortisol ratio could be a useful tool for monitoring training loads in young trained boxers.
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Affiliation(s)
- S Nassib
- Research Laboratory, "Sport Performance Optimisation", National Centre of Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, Ksar-Saïd, Tunisia
| | - W Moalla
- University of Sfax, High Institute of Sport and Physical Education Sfax, Research Unit EM2S, Sfax, Tunisia
| | - S Hammoudi-Nassib
- Research Laboratory, "Sport Performance Optimisation", National Centre of Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, Ksar-Saïd, Tunisia
| | - M Chtara
- Research Laboratory, "Sport Performance Optimisation", National Centre of Medicine and Science in Sports, Tunis, Tunisia; University of Manouba, ISSEP, Ksar-Saïd, Tunisia
| | - Y Hachana
- University of Manouba, ISSEP, Ksar-Saïd, Tunisia
| | - Z Tabka
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty of Medicine Ibn El Jazzar, Sousse, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
| | - M Elloumi
- University of Sousse, Laboratory of Cardio-circulatory, Respiratory, and Hormonal Adaptations to Muscular Exercise, Faculty of Medicine Ibn El Jazzar, Sousse, Tunisia; Blaise Pascal University, EA 3533: AME2P, Clermont-Ferrand, France; University of Manouba, ISSEP, Ksar-Saïd, Tunisia
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Chamari K, Briki W, Farooq A, Patrick T, Belfekih T, Herrera CP. Impact of Ramadan intermittent fasting on cognitive function in trained cyclists: a pilot study. Biol Sport 2015; 33:49-56. [PMID: 26985134 PMCID: PMC4786586 DOI: 10.5604/20831862.1185888] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 04/20/2015] [Accepted: 04/23/2015] [Indexed: 02/05/2023] Open
Abstract
This study assessed selected measures of cognitive function in trained cyclists who observed daylight fasting during Ramadan. Eleven cyclists volunteered to participate (age: 21.6±4.8 years, VO2max: 57.7±5.6 ml kg(-1)·min(-1)) and were followed for 2 months. Cognitive function (Cambridge Neuropsychological Test Automated Battery (CANTAB), Reaction Time index (RTI) and Rapid Visual Information Processing (RVP) tests) and sleep architecture (ambulatory EEG) were assessed: before Ramadan (BR), in the 1st week (RA1) and 4th week of Ramadan (RA4), and 2 weeks post-Ramadan (PR). Both cognitive tests were performed twice per day: before and after Ramadan at 8-10 a.m. and 4-6 p.m., and during Ramadan at 4-6 p.m. and 0-2 a.m., respectively. Training load (TL) by the rating of perceived exertion (RPE) method and wellness (Hooper index) were measured daily. If the TL increased over the study period, this variable was stable during Ramadan. The perceived fatigue and delayed onset muscle soreness (DOMS) increased at RA4. Sleep patterns and architecture showed clear disturbances, with significant increases in the number of awakenings and light sleep durations during Ramadan (RA1 and RA4), together with decreased durations of deep and REM sleep stages at PR. RTI (simple and multiple reaction index) reaction and movement times did not vary over the study period. The RVP test showed reduced false alarms during Ramadan, suggesting reduced impulsivity. Overall accuracy significantly increased at RA1, RA4 and PR compared to baseline. At RA4, the accuracy was higher at 0-2 a.m. compared to 4-6 p.m. Despite the observed disturbances in sleep architecture, Ramadan fasting did not negatively impact the cognitive performance of trained cyclists from the Middle East.
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Affiliation(s)
- K Chamari
- Athletes Health and Performance Research Center (AHP), Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - W Briki
- University of French West Indies and Guyana, Department of Sport Sciences, (ACTES) Laboratory, Pointe-à-Pitre, Guadeloupe, France
| | - A Farooq
- Athletes Health and Performance Research Center (AHP), Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - T Patrick
- National Sports Medicine Program (NSMP), Aspetar, Doha, Qatar; Sport Performance Research Institute of New Zealand (SPRINZ)
| | - T Belfekih
- National Sports Medicine Program (NSMP), Aspetar, Doha, Qatar
| | - C P Herrera
- Athletes Health and Performance Research Center (AHP), Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
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Hue O, Le Jeannic P, Chamari K. Self-hydration and thermoregulatory processes of average-level paddlers during international surfski events in a tropical climate. Biol Sport 2015; 32:329-332. [PMID: 28479662 PMCID: PMC5394853 DOI: 10.5604/20831862.1188610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 09/03/2014] [Accepted: 03/15/2015] [Indexed: 11/18/2022] Open
Abstract
The aim was to investigate thermal response, hydration behaviour and performance in flatwater kayaking races in tropical conditions (35.9 ± 2.8°C and 64 ± 4% RH). Eight regionally ranked paddlers (ARP) participated in the 2012 Surfski Ocean Racing World Cup in Guadeloupe (an inline 15-km downwind race). Core temperature (Tc) and heart rate (HR) were measured using portable telemetry units, while water intake was deduced from backpack absorption. The kayakers were asked to rate both their comfort sensation and thermal sensation on a scale before and after the race. The performance was not related to any measured parameters, and high values of post-race Tc were related to high pre-race Tc. The present study demonstrated that average-range paddlers are able to perform in a tropical climate, drinking little and paddling at high intensity without any interference from thermal sensations. Core temperature at the end of the race was positively related to pre-race Tc, which reinforces the importance of beginning surfski races with a low Tc and raises the question of pre-cooling strategies for paddlers, and more specifically for those with a low convection body surface.
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Affiliation(s)
- O Hue
- Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, 97157 Pointe à Pitre, Guadeloupe, France
| | - P Le Jeannic
- Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, 97157 Pointe à Pitre, Guadeloupe, France.,CREPS des Antilles et de la Guyane, 97182 Abymes Cedex, Guadeloupe, France
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
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Padulo J, Tabben M, Attene G, Ardigò LP, Dhahbi W, Chamari K. The Impact of Jumping during Recovery on Repeated Sprint Ability in Young Soccer Players. Res Sports Med 2015; 23:240-52. [PMID: 26038845 DOI: 10.1080/15438627.2015.1040919] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study compared the effect of counter-movement-jump (CMJ)-based recovery on repeated-sprint-ability (RSA). Eighteen male footballers (16 ± 0 years, 65 ± 10 kg, 1.74 ± 0.10 m) performed three RSA-tests. RSA-1/-3 were performed according to standard procedures, while three CMJs (over 10″) - as a potential fatigue-determinant and/or running mechanics interference--were administered during RSA-2 recoveries. RSA performance, exercise effort (fatigue index [FI], rating of perceived exertion [RPE], blood lactate concentration [BLa]), simple kinematics (steps number), vertical-jump characteristics (stretch-shortening-cycle-efficiency [SSCE] assessed before/after RSA) were investigated. ANOVA showed no differences between RSA-1,-3. During RSA-2, performance was lower than RSA-1/-3, while steps number did not change. During RSA-2, FI, BLa, RPE were higher than RSA-1/-3 (FI +21.10/+20.43%, P<0.05; BLa +16.25/+13.34%, P<0.05; RPE +12.50/+9.57%, P<0.05). During RSA-2, SSCE, as the CMJ/squat-jump-height-ratio, was not significantly different from RSA-1/-3. Passive recovery RSA allows better performance. Yet, RSA CMJ-based recovery is effective in increasing training load (FI, BLa, RPE) without perturbing running mechanics (simple kinematics, SSCE).
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Affiliation(s)
- J Padulo
- a University eCampus , Novedrate , Italy
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Padulo J, Haddad M, Ardigò LP, Chamari K, Pizzolato F. High frequency performance analysis of professional soccer goalkeepers: a pilot study. J Sports Med Phys Fitness 2015; 55:557-562. [PMID: 24921614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM High-speed video analysis was performed during ten official-matches, to assess the performance of ten goalkeepers (GK) from Italian third/fourth divisions (C-D). METHODS The variables studied were: number (N.) of frontal and lateral actions with distance covered (speed during first-last meter) and total distance covered during match. RESULTS Match analysis showed that N. of lateral (right/left) changes of direction in GK-C was 48% (P<0.005) lower, and forward changes of action 53% greater (P<0.001) compared to GK-D. N. of forward and lateral actions in GK-C was 49% and 67% (P<0.001 and P<0.0001) greater than GK-D, respectively. Particularly, in GK-C the covered average distance, frontal and lateral, was 27% and 58% (P<0.005 and P<0.001) greater than in GK-D, respectively. Velocity of first meter of forward and lateral actions for GK-C were 9% and 27% lower (P>0.05 and P>0.05) than GK-D, respectively. Last meter of forward and lateral actions for GK-C was 57% greater and 43% lower (P<0.001 and P<0.005) than GK-D, respectively. Finally, total covered distance, considering all actions, was 60% greater for GK-C compared to GK-D (P<0.001). CONCLUSION The work presented in this paper identifies the relevant aspects of the goalkeeper game that are valuable for a coach in terms of team and individual performance analysis.
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Affiliation(s)
- J Padulo
- University eCampus, Novedrate, Italy -
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Padulo J, Laffaye G, Chaouachi A, Chamari K. Bench press exercise: the key points. J Sports Med Phys Fitness 2015; 55:604-608. [PMID: 24823345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The bench press exercise (BPE) is receiving increasing interest as a field testing, training/therapeutic modality to improve neuromuscular performance or to increase bone mass density. Several studies have been performed using BPE as a standard for increasing upper-limb strength. For this purpose, the position of the bar, the loads, the sets, the number of repetitions, the recovery time in-between sets, the movement speed, the muscular work and the use of the determination of the one repetition maximum (1-RM) are the classical tools investigated in the literature that have been shown to affect the BPE effect on neuromuscular. The goal of the present short review is to make a picture of the current knowledge on the bench press exercise, which could be very helpful for a better understanding of this standard movement and its effects. Based on the related literature, several recommendations on these key points are presented here.
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Affiliation(s)
- J Padulo
- University e Campus, Novedrate, Italy -
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Tabben M, Tourny C, Haddad M, Chaabane H, Chamari K, Coquart JB. Validity and reliability of the session-RPE method for quantifying training load in karate athletes. J Sports Med Phys Fitness 2015:R40Y9999N00A150089. [PMID: 25908242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM To test the construct validity and reliability of the session rating of perceived exertion (sRPE) method by examining the relationship between RPE and physiological parameters (heart rate: HR and blood lactate concentration: [La --] ) and the correlations between sRPE and two HR--based methods for quantifying internal training load (Banister's method and Edwards's method) during karate training camp. METHODS Eighteen elite karate athletes: ten men (age: 24.2 ± 2.3 y, body mass: 71.2 ± 9.0 kg, body fat: 8.2 ± 1.3% and height: 178 ± 7 cm) and eight women (age: 22.6 ± 1.2 y, body mass: 59.8 ± 8.4 kg, body fat: 20.2 ± 4.4%, height: 169 ± 4 cm) were included in the study. During training camp, subjects participated in eight karate--training sessions including three training modes (4 tactical--technical, 2 technical--development, and 2 randori training), during which RPE, HR, and [La -- ] were recorded. RESULTS Significant correlations were found between RPE and physiological parameters (percentage of maximal HR: r = 0.75, 95% CI = 0.64--0.86; [La --] : r = 0.62, 95% CI = 0.49--0.75; P < 0.001). Moreover, individual sRPE was significantly correlated with two HR--based methods for quantifying internal training load ( r = 0.65--0.95; P < 0.001). The sRPE method showed the high reliability of the same intensity across training sessions (Cronbach's α = 0.81, 95% CI = 0.61--0.92). CONCLUSION This study demonstrates that the sRPE method is valid for quantifying internal training load and intensity in karate.
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Affiliation(s)
- M Tabben
- CETAPS, University of Rouen, Mont Saint Aignan, France -
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Gharbi Z, Dardouri W, Haj-Sassi R, Chamari K, Souissi N. Aerobic and anaerobic determinants of repeated sprint ability in team sports athletes. Biol Sport 2015; 32:207-12. [PMID: 26424923 PMCID: PMC4577558 DOI: 10.5604/20831862.1150302] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 09/12/2014] [Accepted: 01/30/2015] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to examine in team sports athletes the relationship between repeated sprint ability (RSA) indices and both aerobic and anaerobic fitness components. Sixteen team-sport players were included (age, 23.4 ± 2.3 years; weight, 71.2 ± 8.3 kg; height, 178 ± 7 cm; body mass index, 22.4 ± 2 kg · m(-2); estimated VO2max, 54.16 ± 3.5 mL · kg(-1) · min(-1)). Subjects were licensed in various team sports: soccer (n = 8), basketball (n = 5), and handball (n = 3). They performed 4 tests: the 20 m multi-stage shuttle run test (MSRT), the 30-s Wingate test (WingT), the Maximal Anaerobic Shuttle Running Test (MASRT), and the RSA test (10 repetitions of 30 m shuttle sprints (15 + 15 m with 180° change of direction) with 30 s passive recovery in between). Pearson's product moment of correlation among the different physical tests was performed. No significant correlations were found between any RSA test indices and WingT. However, negative correlations were found between MASRT and RSA total sprint time (TT) and fatigue index (FI) (r = -0.53, p < 0.05 and r = -0.65, p < 0.01, respectively). No significant relationship between VO2max and RSA peak sprint time (PT) and total sprint time (TT) was found. Nevertheless, VO2max was significantly correlated with the RSA FI (r = -0.57, p < 0.05). In conclusion, aerobic fitness is an important factor influencing the ability to resist fatigue during RSA exercise. Our results highlighted the usefulness of MASRT, in contrast to WingT, as a specific anaerobic testing procedure to identify the anaerobic energy system contribution during RSA.
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Affiliation(s)
- Z Gharbi
- Tunisian Research Laboratory ''Sport Performance Optimisation'', National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia ; High Institute of Sports and Physical Education, University of Gafsa, Gafsa, Tunisia
| | - W Dardouri
- Department of physical Education, University of Hail-College of Education, Hail, Kingdom of Saudi Arabia
| | - R Haj-Sassi
- Research Unit, Sportive Performance and Physical Rehabilitation, High Institute of Sports and Physical Education of Kef, University of Jendouba, Kef, Tunisia
| | - K Chamari
- Athlete Health and Performance Research Centre, Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - N Souissi
- Tunisian Research Laboratory ''Sport Performance Optimisation'', National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
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Padulo J, Vando S, Chamari K, Chaouachi A, Bagno D, Pizzolato F. Validity of the MarkWiiR for kinematic analysis during walking and running gaits. Biol Sport 2015; 32:53-8. [PMID: 25729150 PMCID: PMC4314604 DOI: 10.5604/20831862.1127282] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2014] [Revised: 02/07/2014] [Accepted: 06/26/2014] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to validate the MarkWiiR (MW) captured by the Nintendo Wii-Remote (100-Hz) to assess active marker displacement by comparison with 2D video analysis. Ten participants were tested on a treadmill at different walking (1<6 km · h−1) and running (10<13 km · h−1) speeds. During the test, the active marker for MW and a passive marker for video analysis were recorded simultaneously with the two devices. The displacement of the marker on the two axes (x-y) was computed using two different programs, Kinovea 0.8.15 and CoreMeter, for the camera and MW, respectively. Pearson correlation was acceptable (x-axis r≥0.734 and y-axis r≥0.684), and Bland–Altman plots of the walking speeds showed an average error of 0.24±0.52% and 1.5±0.91% for the x- and y-axis, respectively. The difference of running speeds showed average errors of 0.67±0.33% and 1.26±0.33% for the x- and y-axes, respectively. These results demonstrate that the two measures are similar from both the x- and the y-axis perspective. In conclusion, these findings suggest that the MarkWiiR is a valid and reliable tool to assess the kinematics of an active marker during walking and running gaits.
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Affiliation(s)
- J Padulo
- University e-Campus, Novedrate, Italy ; Tunisian Research Laboratory "Sports Performance Optimization" National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - S Vando
- Department of Human, Social and Health Sciences, University of Cassino and Southern Lazio, Cassino, Italy
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - A Chaouachi
- Tunisian Research Laboratory "Sports Performance Optimization" National Center of Medicine and Science in Sport, Tunis, Tunisia ; AUT University, Sports Performance Research Institute New Zealand, Auckland, New Zealand
| | - D Bagno
- Faculty of Informatics Engineering, University of "La Sapienza", Rome, Italy
| | - F Pizzolato
- Department of Neurological and Movement Sciences, University of Verona, Italy
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Galy O, Zongo P, Chamari K, Chaouachi A, Michalak E, Dellal A, Castagna C, Hue O. Anthropometric and physiological characteristics of Melanesian futsal players: a first approach to talent identification in Oceania. Biol Sport 2015; 32:135-41. [PMID: 26060337 PMCID: PMC4447759 DOI: 10.5604/20831862.1140428] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 08/22/2014] [Accepted: 10/23/2014] [Indexed: 11/13/2022] Open
Abstract
This study assessed the anthropometric and physiological characteristics of elite Melanesian futsal players in order to determine the best performance predictors. Physiological parameters of performance were measured in 14 Melanesian (MEL-G, 24.4±4.4 yrs) and 8 Caucasian (NMEL-G, 22.9±4.9) elite futsal players, using tests of jump-and-reach (CMJ), agility (T-Test), repeated sprint ability (RSA), RSA with change-of-direction (RSA-COD), sprints with 5 m, 10 m, 15 m, and 30 m lap times, and aerobic fitness with the 30-15 intermittent fitness test (30-15 IFT). The anthropometric data revealed significantly lower height for MEL-G compared with NMEL-G: 1.73±0.05 and 1.80±0.08 m, respectively; P = 0.05. The CMJ was significantly higher for MEL-G than NMEL-G: 50.4±5.9 and 45.2±4.3 cm, respectively; P = 0.05. T-Test times were significantly lower for MEL-G than NMEL-G: 10.47±0.58 and 11.01±0.64 seconds, respectively; P = 0.05. MEL-G height was significantly related to CMJ (r = 0.706, P = 0.01), CMJpeakP (r = 0.709, P = 0.01) and T-Test (r = 0.589, P = 0.02). No significant between-group differences were observed for sprint tests or 30-15 IFT, including heart rate and estimated VO2max. Between groups, the percentage decrement (%Dec) in RSA-COD was significantly lower in MEL-G than NMEL-G (P = 0.05), although no significant difference was noted between RSA and RSA-COD. Within groups, no significant difference was observed between %Dec in RSA or RSA-COD; P = 0.697. This study presents specific anthropometric (significantly lower height) and physiological (significantly greater agility) reference values in Melanesians, which, taken together, might help coaches and physical fitness trainers to optimize elite futsal training and talent identification in Oceania.
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Affiliation(s)
- O Galy
- ESPE de la Nouvelle-Calédonie, CNEP EA 4242, Université de la Nouvelle-Calédonie, Campus de Nouville - BP R4 - 98851 Nouméa, New Caledonia ; UPRES-EA 3596, Laboratoire ACTES, Unité de Formation et de Recherche des Sciences et Techniques des Activités Physiques et Sportives Antilles-Guyane, Campus de Fouillole, 97159 Pointe à Pitre Cedex, France a
| | - P Zongo
- ESPE de la Nouvelle-Calédonie, CNEP EA 4242, Université de la Nouvelle-Calédonie, Campus de Nouville - BP R4 - 98851 Nouméa, New Caledonia ; UPRES-EA 3596, Laboratoire ACTES, Unité de Formation et de Recherche des Sciences et Techniques des Activités Physiques et Sportives Antilles-Guyane, Campus de Fouillole, 97159 Pointe à Pitre Cedex, France a
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - A Chaouachi
- Research Laboratory ''Sport Performance Optimization'', National Centre of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
| | - E Michalak
- UPRES-EA 3596, Laboratoire ACTES, Unité de Formation et de Recherche des Sciences et Techniques des Activités Physiques et Sportives Antilles-Guyane, Campus de Fouillole, 97159 Pointe à Pitre Cedex, France a
| | - A Dellal
- FIFA Medical Center of Excellence, Centre Orthopedique Santy, Lyon, France
| | - C Castagna
- Football Training and Biomechanics Laboratory, Technical Department, Italian Football Federation (FIGC), Coverciano (Florence), Italy
| | - O Hue
- ESPE de la Nouvelle-Calédonie, CNEP EA 4242, Université de la Nouvelle-Calédonie, Campus de Nouville - BP R4 - 98851 Nouméa, New Caledonia
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Padulo J, Chamari K, Chaabène H, Ruscello B, Maurino L, Sylos Labini P, Migliaccio GM. The effects of one-week training camp on motor skills in Karate kids. J Sports Med Phys Fitness 2014; 54:715-724. [PMID: 25289710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The purpose of this study was to evaluate the effects of short-term increased hours of specific high-intensity karate training on motor skills in young karate athletes aged between 8 and 12 years. METHODS Seventy-three children, who regularly trained three karate sessions per-week were divided in two groups: high-intensity karate group (HG=53) and low-intensity karate group (LG=20). HG trained for 7 days: with two sessions per-day (one hour per-session) including specific karate techniques as well as coordination, balance, and flexibility exercises. LG, however, followed the same number of karate training sessions as before the beginning of the study (i.e., three sessions per-week with one hour per-session). Participants performed a battery of tests, 24 hours pre- and one week post-training: a medicine ball throw (MBT), standing long jump (SLJ), active joint flexibility (JM) and lateral/frontal jumps (JLT). RESULTS Significant differences between results of pre and post karate training (ANOVA with repeated measures) included: MBT (P<0.05), SLJ (P<0.0001), JM (P<0.0001), JLT (P<0.0001); whilst the interaction training × time was: MBT (P=0.145), SLJ (P<0.0001), JM (P<0.0001), JLT (P< 0.0001). The HG significantly improved their performance on MBT by 3.23% (P<0.05), SLJ by 5.09% (P<0.001), JM by 1.51% (P<0.001), and JLT by 21.36% (P<0.001). For LG group, there were no significant differences between pre and post-testing in all fitness tests. CONCLUSION Muscular power, flexibility and coordination represent the basics of karate fitness component. In this regard, short term high-intensity karate training represents an effective method for enhancing muscular power and range of motion (i.e. flexibility) in young karate athletes aged between 8 and 12 years. Further studies are needed to support these findings with deeper data.
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Affiliation(s)
- J Padulo
- University e-Campus, Novedrate , Como, Italy -
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Hue O, Le Jeannic P, Chamari K. A pilot study on how do elite surfski padllers manage their effort and hydration pattern in the heat. Biol Sport 2014; 31:283-8. [PMID: 25435671 PMCID: PMC4203845 DOI: 10.5604/20831862.1120936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2014] [Indexed: 11/13/2022] Open
Abstract
To investigate thermal response, hydration behaviour and performance over flatwater kayaking races in tropical conditions (36.8°C and 68% rh). Five internationally-ranked subjects participated in the 2012 Surfski Ocean Racing World Cup in Guadeloupe to the "Ze Caribbean Race 2012" [i.e., a 35-km downwind race]. Core temperature (T°C) and heart rate (HR) were measured using portable telemetry units whereas water intake was deduced from backpacks absorption. The kayakers were asked to rate both their comfort sensation and thermal sensation on a scale before and after the race. The performance was related to an increase in T°C, high HR and low water intake (WI); and (2) high values of final T°C were related to high pre T°C and greater increases in T°C being obtained with low pre T°C and (3) WI being related to high pre T°C. The present study demonstrated that the fastest kayakers were those able to paddle at the highest intensities, increasing their T°C and drinking little water without any interference from thermal sensations. Water intake was positively related to pre-race T°C, which reinforces the importance of beginning surfski races with a low T°C. This study demonstrated that well-trained kayakers drinking ad libitum were able to anticipate their intensity/heat storage ratio to prevent heat illness and severe dehydration and maintain high performance.
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Affiliation(s)
- O Hue
- Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, 97157 Pointe à Pitre, Guadeloupe, France
| | - P Le Jeannic
- Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, 97157 Pointe à Pitre, Guadeloupe, France ; CREPS des Antilles et de la Guyane, 97182 Abymes Cedex, Guadeloupe, France
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Qatar
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Tabben M, Chaabène H, Franchini E, Tourny C, Chamari K, Coquart J. The influence of karate practice level and sex on physiological and perceptual responses in three modern karate training modalities. Biol Sport 2014; 31:201-7. [PMID: 25177098 PMCID: PMC4135064 DOI: 10.5604/20831862.1111438] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2014] [Indexed: 11/25/2022] Open
Abstract
Objective The aim of the present study was to examine the influence of karate practice level (national vs international level) and sex (women vs men) on physiological and perceptual responses in three modern karate training modalities (tactical-technical (TT), technical-development (TD), and randori). Method The study included 18 karatekas participating in an eight-session training camp of four TT, two TD, and two randori. During each session, the percentage of maximal heart rate (HR), blood lactate concentration [La-], and rating of perceived exertion (RPE) were assessed. Results The main results showed that the percentage of maximal HR was significantly higher in women than in men regardless of practice level or training modality (70.3 ± 4.1 vs 66.2 ± 6.3, respectively). Moreover, [La-] and RPE were significantly lower in international-level karatekas compared with their national-level counterparts whatever the sex or training modality ([La-] = 11.4 ± 2.6 vs 8.3 ± 2.4 mmol · L-1 and RPE = 3.6 ± 1.2 vs 4.3 ± 1.5, respectively). Last, physiological and perceptual responses were significantly higher during randori in comparison with TT and TD for both sexes. Conclusion The combination of [La-] and RPE thus seems to be a good indicator for discriminating between national- and international-level karatekas, and randori seems to be an effective means to reproduce official karate sparring.
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Affiliation(s)
- M Tabben
- CETAPS, University of Rouen, Faculty of Sport Sciences, Mont Saint Aignan, France ; Tunisian Research Laboratory: Sports, Performance and Optimization, National Center of Medicine and Science in Sports, Tunis, Tunisia
| | - H Chaabène
- Research Unit: Analysis and Evaluation of Factors Affecting the Sport Performance, Higher Institute of Sports and Physical Education, Ksar Said, Tunisia
| | - E Franchini
- Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of Sao Paulo, Sao Paulo, Brazil ; University of Montpellier, Faculty of Sport Science, Montpellier, France
| | - C Tourny
- CETAPS, University of Rouen, Faculty of Sport Sciences, Mont Saint Aignan, France
| | - K Chamari
- Tunisian Research Laboratory: Sports, Performance and Optimization, National Center of Medicine and Science in Sports, Tunis, Tunisia ; Research and Education Centre, Aspetar, Qatar ; Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - J Coquart
- CETAPS, University of Rouen, Faculty of Sport Sciences, Mont Saint Aignan, France
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Bezrati-Benayed I, Nasrallah F, Feki M, Chamari K, Omar S, Alouane-Trabelsi L, Ben Mansour A, Kaabachi N. Urinary creatine at rest and after repeated sprints in athletes: a pilot study. Biol Sport 2014; 31:49-54. [PMID: 24917689 PMCID: PMC3994585 DOI: 10.5604/20831862.1086732] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2013] [Indexed: 11/13/2022] Open
Abstract
Creatine plays a key role in muscle function and its evaluation is important in athletes. In this study, urinary creatine concentration was measured in order to highlight its possible significance in monitoring sprinters. The study included 51 sprinters and 25 age- and sex-matched untrained subjects as a control group. Body composition was measured and dietary intake estimated. Urine samples were collected before and after standardized physical exercise. Creatine was assessed by gas chromatography mass spectrometry. Basal urinary creatine (UC) was significantly lower in sprinters than controls (34±30 vs. 74±3 µmol/mmol creatinine, p < 0.05). UC was inversely correlated with body mass (r = -0.34, p < 0.01) and lean mass (r = -0.30, p < 0.05), and positively correlated with fat mass (r = 0.32, p < 0.05). After acute exercise, urinary creatine significantly decreased in both athletes and controls. UC is low in sprinters at rest and further decreases after exercise, most likely due to a high uptake and use of creatine by muscles, as muscle mass and physical activity are supposed to be greater in athletes than untrained subjects. Further studies are needed to test the value of urinary creatine as a non-invasive marker of physical condition and as a parameter for managing Cr supplementation in athletes.
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Affiliation(s)
- I Bezrati-Benayed
- Laboratory of Biochemistry, Rabta Hospital, Tunisia ; Research Laboratory "Sport Performance Optimization", National Center for Medicine and Sciences of Sports, Tunisia
| | - F Nasrallah
- Laboratory of Biochemistry, Rabta Hospital, Tunisia
| | - M Feki
- Laboratory of Biochemistry, Rabta Hospital, Tunisia ; Department of Physiology, Faculty of Medicine of Tunis, Tunisia
| | - K Chamari
- Research Laboratory "Sport Performance Optimization", National Center for Medicine and Sciences of Sports, Tunisia ; Research and Education Centre, Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - S Omar
- Laboratory of Biochemistry, Rabta Hospital, Tunisia ; Department of Physiology, Faculty of Medicine of Tunis, Tunisia
| | | | - A Ben Mansour
- Department of Physiology, Faculty of Medicine of Tunis, Tunisia
| | - N Kaabachi
- Laboratory of Biochemistry, Rabta Hospital, Tunisia
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Gharbi Z, Dardouri W, Haj-Sassi R, Castagna C, Chamari K, Souissi N. Effect of the number of sprint repetitions on the variation of blood lactate concentration in repeated sprint sessions. Biol Sport 2014; 31:151-6. [PMID: 24899781 PMCID: PMC4042663 DOI: 10.5604/20831862.1099046] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2014] [Indexed: 11/13/2022] Open
Abstract
The aim of the present study was to examine the effect of number of sprint repetitions on the variation of blood lactate concentration (blood [La]) during different repeated-sprint sessions in order to find the appropriate number of sprint repetitions that properly simulates the physiological demands of team sport competitions. Twenty male team-sport players (age, 22.2 ± 2.9 years) performed several repeated-sprint sessions (RSS) consisting of 1, 2, 3, 4, 5, 9, or 10 repetitions of 30 m shuttle sprints (2 × 15 m) with 30 s recovery in between. The blood [La] was obtained after 3 min of recovery at the end of each RSS. The present study showed that for RSS of 3 sprints (RSS3) there was a high increase (p<0.001) in blood [La], which reached approximately fivefold resting values (9.4±1.7 mmol · l−1) and then remained unchanged for the RSS of 4 and 5 sprints (9.6±1.4 and 10.5±1.9 mmol · l−1, p=0.96 and 0.26, respectively). After RSS9 and RSS10 blood [La] further significantly increased to 12.6 and 12.7 mmol · l−1, p<0.001, respectively. No significant difference was found between RSS3, RSS4 and RSS5 for the percentage of sprint speed decrement (Sdec) (1.5±1.2; 2.0±1.1 and 2.6±1.4%, respectively). There was also no significant difference between RSS9 and RSS10 for Sdec (3.9±1.3% and 4.5±1.4%, respectively). In conclusion, the repeated-sprint protocol composed of 5 shuttle sprint repetitions is more representative of the blood lactate demands of the team sports game intensity.
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Affiliation(s)
- Z Gharbi
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia ; High Institute of Sports and Physical Education, University of Gafsa, Gafsa, Tunisia
| | - W Dardouri
- Department of physical Education, University of Hail-College of Education, Hail, Kingdom of Saudi Arabia
| | - R Haj-Sassi
- Research Unit "School and University Sportive Practices and Performance", High Institute of Sports and Physical Education, University of Jendouba, Kef, Tunisia
| | - C Castagna
- Football Training and Biomechanics Laboratory, Italian Football Federation (FIGC), Technical Department, Coverciano (Florence), Italy
| | - K Chamari
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia ; Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - N Souissi
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
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Galy O, Ben Zoubir S, Hambli M, Chaouachi A, Hue O, Chamari K. Relationships between heart rate and physiological parameters of performance in top-level water polo players. Biol Sport 2014; 31:33-8. [PMID: 24917687 PMCID: PMC3994583 DOI: 10.5604/20831862.1083277] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2013] [Indexed: 11/13/2022] Open
Abstract
The aim of this study was to measure the heart rate (HR) response of eight elite water polo players during the four 7-min quarters of the game and to check for relationships with the physiological parameters of performance ([Formula: see text]O2max, Th1vent, Th2vent). Each athlete performed a [Formula: see text]O2max treadmill test and played a water polo game wearing a heart rate monitor. The game fatigue index was calculated as the ratio of the fourth-quarter HR to the first-quarter HR: HR4/HR1. The results showed a slight decrease in fourth-quarter HR compared with the first quarter, with the mean four-quarter HR equal to 79.9±4.2% of HRmax. Stepwise multiple regression analysis showed [Formula: see text]O2max to be the main explanatory factor of game intensity, i.e. game HR expressed in %HRreserve (R=0.88, P<0.01). We observed that higher aerobic capacity resulted in higher game intensity. We also observed a decrease in the playing intensity in the fourth quarter compared with the first, likely due to very high game involvement. We concluded that high aerobic capacity seems necessary to ensure high game intensity in water polo. This suggests that coaches should encourage their athletes to reach a minimum level of [Formula: see text]O2max and that HR monitoring could be of great interest in the control of water polo training sessions.
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Affiliation(s)
- O Galy
- Laboratoire ACTES EA 3596, UFR-STAPS, Antilles-Guyane, Pointe à Pitre, France ; Laboratoire CNEP EA 4242 University of New Caledonia, New Caledonia
| | - S Ben Zoubir
- Research Laboratory "Sport Performance Optimization", National Centre of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
| | - M Hambli
- Research Laboratory "Sport Performance Optimization", National Centre of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
| | - A Chaouachi
- Research Laboratory "Sport Performance Optimization", National Centre of Medicine and Sciences in Sport (CNMSS), Tunis, Tunisia
| | - O Hue
- Laboratoire ACTES EA 3596, UFR-STAPS, Antilles-Guyane, Pointe à Pitre, France
| | - K Chamari
- Athlete Health and Performance Research Centre, ASPETAR, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
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Dhahbi W, Zouita A, Ben Salah F, Chaouachi A, Chamari K, Chèze L. Reference database of the gait cycle for young healthy Tunisian adults. Ing Rech Biomed 2014. [DOI: 10.1016/j.irbm.2013.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Dardouri W, Gharbi Z, Selmi MA, Sassi RH, Moalla W, Chamari K, Souissi N. Reliability and validity of a new maximal anaerobic shuttle running test. Int J Sports Med 2013; 35:310-5. [PMID: 24081619 DOI: 10.1055/s-0033-1348255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The purpose of this study was twofold: first to assess the relative and absolute reliability of a new Maximal Anaerobic Shuttle Running Test (MASRT), and second to evaluate the criterion validity of the MASRT. 16 team sport players participated in this study. The velocity (VMASRT) and the number of shuttles achieved at volitional exhaustion were measured. To assess the reliability of the MASRT, each player performed the MASRT twice, on separate days. The criterion validity of the MASRT was determined by examining the relationship between MASRT indices and the Wingate test (WingT) performances. Results showed no difference between test-retest MASRT scores for VMASRT and the number of shuttles (P>0.05). The intraclass correlation coefficients (ICC) values for VMASRT and Shuttle number were 0.84 and 0.80, respectively. The coefficients of variation (CV) and the mean difference (bias)±the 95% limits of agreement for the same variables were 3.6 and 12.9%, and 0.02±0.37m·s-1 and 0.3±6.7, respectively. The strongest correlation was found between mean power output relative to body mass (MPO) measured during the WingT and VMASRT (r=0.77, P<0.001). The MASRT constitutes a reliable and valid field tool for assessing short term repeated running capacity of team sport players.
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Affiliation(s)
- W Dardouri
- Research Unit, School and University Sportive Practices and Performance, High Institute of Sports and Physical Education, Boulifa, Kef, Tunisia
| | - Z Gharbi
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - M A Selmi
- Research Unit, School and University Sportive Practices and Performance, High Institute of Sports and Physical Education, Boulifa, Kef, Tunisia
| | - R H Sassi
- Physical Education Department, Faculty of Education, King Abdulaziz University, Kingdom of Saudi Arabia, Jeddah, Saudi Arabia
| | - W Moalla
- High Institute of Sports Sciences, UR EM2S-ISSEPS, Sfax, Tunisia
| | - K Chamari
- Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Research and Education Centre, Doha, Qatar
| | - N Souissi
- Tunisian Research Laboratory "Sport Performance Optimisation", National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
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Affiliation(s)
- J Padulo
- University of "Tor Vergata" Faculty of Medicine and Surgery Rome Italy National Center of Medicine and Science in Sport Tunisian Research Laboratory, "Sports Performance Optimization" Tunis Tunisia
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Jebali T, Moalla W, Elloumi M, Padulo J, Baquet G, Chamari K. The relevant use of the traditional tunisian game ''raqassa'' for cardiovascular stimulation in schoolchildren. Biol Sport 2013; 30:219-25. [PMID: 24744492 PMCID: PMC3944567 DOI: 10.5604/20831862.1059304] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2013] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to investigate the heart rate (HR) responses, the rate of perceived exertion (RPE), and the feeling during physical education schooling while performing traditional games activities compared to intermittent exercise. Nineteen pre-pubertal children randomly performed on different days two types of lessons (intermittent running mode vs. traditional Tunisian “Raqassa” game) lasting 12-min each. HR was continuously recorded during both lessons, while ratings of perceived exertion and Feeling values were recorded after the sessions. The mean HR value during the traditional game was significantly higher than during intermittent exercise (p<0.05). Conversely, the perceived exertion score was significantly higher after intermittent exercise than the traditional exercise game (p<0.05), showing that the higher cardiovascular strain of the game was perceived as “lighter” than the run. Simultaneously, the children's Feeling was significantly higher after the traditional game than intermittent exercise (p<0.001), showing a higher satisfaction from playing with respect to running. Exercise based on the “Raqassa” traditional game could be used in pre-pubertal children as an alternative or as an additional method for suitable cardiovascular stimulation during physical education lessons with lower perceived exertion and better feeling compared to intermittent running.
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Affiliation(s)
- T Jebali
- Research Laboratory "Sport Performance Optimisation" CNMSS, Tunis, Tunisia ; UR EM2S, ISSEPS, Sfax University Tunisia
| | - W Moalla
- UR EM2S, ISSEPS, Sfax University Tunisia ; Laboratory « Physiologie et Explorations fonctionnelles » Faculty of Medicine, Sousse. Tunisia
| | - M Elloumi
- Laboratory « Physiologie et Explorations fonctionnelles » Faculty of Medicine, Sousse. Tunisia ; ISSEP Ksar-Saïd, Manouba University, Tunisia
| | - J Padulo
- Research Laboratory "Sport Performance Optimisation" CNMSS, Tunis, Tunisia ; Faculty of Medicine and Surgery, University of "Tor Vergata" Rome, Italy
| | - G Baquet
- Laboratory of Human Movement Studies, Faculty of Sport Sciences and Physical Education, Lille 2 University, Ronchin, France
| | - K Chamari
- Research Laboratory "Sport Performance Optimisation" CNMSS, Tunis, Tunisia ; Research and Education Center, Aspetar, Doha, Qatar
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Racil G, Ben Ounis O, Hammouda O, Kallel A, Zouhal H, Chamari K, Amri M. Effects of high vs. moderate exercise intensity during interval training on lipids and adiponectin levels in obese young females. Eur J Appl Physiol 2013; 113:2531-40. [PMID: 23824463 DOI: 10.1007/s00421-013-2689-5] [Citation(s) in RCA: 170] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 06/21/2013] [Indexed: 12/19/2022]
Abstract
PURPOSE We investigate the effects of 12-week interval training of moderate- or high-intensity exercise on blood lipids and plasma levels of adiponectin. METHODS Thirty-four obese adolescent females [age = 15.9 ± 0.3 years; BMI and BMI-Z-score = 30.8 ± 1.6 kg/m(2) and 3 ± 0.3, respectively], were randomized to high-intensity interval training (HIIT, n = 11), moderate-intensity interval training (MIIT, n = 11), or a control group (CG, n = 12). Maximal oxygen uptake ([Formula: see text]), maximal aerobic speed (MAS), plasma lipids and adiponectin levels were measured in all subjects before and after training. RESULTS Following the training program, in both training groups, body mass, BMI-Z-score, and percentage body fat (% BF) decreased, while [Formula: see text] and MAS increased. Low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and adiponectin levels were positively altered (-12.6 and -7.4 %; 6.3 and 8.0 %; 35.8 and 16.2 %; high to moderate training program, respectively). Waist circumference, triglyceride and total cholesterol decreased only in HIIT group (-3.5; -5.3 and -7.0 %, respectively, in all P < 0.05). Significant decrease in the usual index of insulin resistance (HOMA-IR) occurred in HIIT and MIIT groups (-29.2 ± 5.3 and -18.4 ± 8.6 %, respectively; P < 0.01). CONCLUSION The results show that HIIT positively changes blood lipids and adiponectin variables in obese adolescent girls, resulting in improved insulin sensitivity, as attested by a lower HOMA-IR, and achieving better results compared to moderate-intensity exercise.
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Affiliation(s)
- G Racil
- Department of Biological Sciences, Faculty of Science of Tunis, University Tunis el Manar, Tunis, Tunisia,
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Padulo J, Di Giminiani R, Ibba G, Zarrouk N, Moalla W, Attene G, M. Migliaccio G, Pizzolato F, Bishop D, Chamari K. The Acute Effect of Whole Body Vibration on Repeated Shuttle-Running in Young Soccer Players. Int J Sports Med 2013; 35:49-54. [DOI: 10.1055/s-0033-1345171] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- J. Padulo
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport, Tunis, Tunisia
| | - R. Di Giminiani
- School of Sport Sciences, Department of Applied Clinical Sciences and Biotechnology, University of L’Aquila, Italy
| | - G. Ibba
- CONI, Italian Regional Olympic Committee, Cagliari, Italy
| | - N. Zarrouk
- Service d’Explorations Fonctionnelles du Système Nerveux, CHU Sahloul, Sousse, Tunisie, Unité de Recherche: Neurophysiologie de la Vigilance, de l’Attention et des Performances, Tunisia
| | - W. Moalla
- High Institut of sports Sciences, UR EM2S-ISSEPS, Sfax, Tunisia
| | - G. Attene
- CONI, Italian Regional Olympic Committee, Cagliari, Italy
| | | | - F. Pizzolato
- Faculty of Exercise and Sport Science, University of Verona, Italy
| | - D. Bishop
- School of Sport and Exercise Science, Institute of Sport, Exercise andActive Living. Victoria University, Melbourne, Australia
| | - K. Chamari
- Tunisian Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sport, Tunis, Tunisia
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Abderrahmane A, Prioux J, Mrizek I, Chamari K, Tabka Z, Bouslama A, Zouhal H. Recovery (Passive vs. Active) during Interval Training and Plasma Catecholamine Responses. Int J Sports Med 2013; 34:742-7. [DOI: 10.1055/s-0032-1327697] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- A. Abderrahmane
- Movement, Sport and health Sciences Laboratory (M2S), UFR APS University of Rennes 2, Rennes, France
| | - J. Prioux
- Movement, Sport and Heath Sciences Laboratory (M2S), Rennes 2 University - ENS Cachan, France, ENS Cachan, Rennes, France
| | - I. Mrizek
- Laboratoire des adaptations cardio-circulatoires, respiratoires, métaboliques et hormonales à l'exercice musculaire, faculté de médecine Ibn El Jazzar, Sousse, Tunisia., Medicine Faculty, Sousse, Tunisia
| | - K. Chamari
- CNMSS, Research Department, Tunis, Tunisia
| | - Z. Tabka
- Clinical Laboratory of Physiology, Medical School of Sousse, Physiology, Sousse, Tunisia
| | - A. Bouslama
- Laboratoire de Biochimie - Unité de recherche MSP UR 28/04 (facteurs de risque cardiovasculaire) Hopital Universitaire Sahloul, Tunisia, Madicine Faculty, Sousse, Tunisia
| | - H. Zouhal
- Laboratoire Mouvement Sport Sante, UFR APS, Rennes, France
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Hammouda O, Chtourou H, Chahed H, Ferchichi S, Chaouachi A, Kallel C, Miled A, Chamari K, Souissi N. High intensity exercise affects diurnal variation of some biological markers in trained subjects. Int J Sports Med 2012; 33:886-91. [PMID: 22791622 DOI: 10.1055/s-0032-1301887] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The study investigated if markers of muscle injury and antioxidant status were affected by a Wingate test performed at 2 different times of day. 15 young male footballers performed 2 tests (randomized) at 07:00-h and 17:00-h. Fasting blood samples were collected before and 3 min after each test for assessment of markers of muscle injury and antioxidant status. Resting oral temperature was recorded during each session. Peak power (10.76 ± 1.05 vs. 11.15 ± 0.83 W.kg( - 1)) and fatigue index (0.41 ± 0.04 vs. 0.49 ± 0.13%) during the Wingate test, and core temperature, were significantly higher (all p<0.05) in the evening. Markers of muscle injury were significantly higher in the evening before and after exercise (e. g., 148.7 ± 67.05 vs. 195 ± 74.6 and 191.6 ± 79.52 vs. 263.6 ± 96.06 IU.L (- 1), respectively, for creatine kinase; both p<0.001). Antioxidant parameters increased after the Wingate test but only resting values were significantly higher in the morning (e. g., 1.33 ± 0.19 vs. 1.19 ± 0.14 µmol.L (- 1) for total antioxidant status; p<0.05). The results indicate that muscle injury and antioxidant activity after the Wingate test were higher in the evening, suggesting a possible link between the biochemical measures and the diurnal fluctuation of anaerobic performance. However, repetition of this study after prescribed rather than self-selected exercise intensity is recommended.
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Affiliation(s)
- O Hammouda
- Research Laboratory Sports performance optimization National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
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Chtourou H, Hammouda O, Chaouachi A, Chamari K, Souissi N. The Effect of Time-of-Day and Ramadan Fasting on Anaerobic Performances. Int J Sports Med 2012; 33:142-7. [DOI: 10.1055/s-0031-1286251] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- H. Chtourou
- Research Laboratory “Sports performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - O. Hammouda
- Research Laboratory “Sports performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - A. Chaouachi
- Research Unit, High Institute of Sport and Physical Education, Sfax, Tunisia, High Institute of Sport and Physical Education, University, Ksar-Saïd, Manouba, Tunisia
| | - K. Chamari
- Research Laboratory “Sports performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
| | - N. Souissi
- Research Laboratory “Sports performance Optimization”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
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Affiliation(s)
- H. Chtourou
- Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sports (CNMSS)
- Research Unit, High Institute of Sport and Physical Education
| | - A. Chaouachi
- Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sports (CNMSS)
| | - O. Hammouda
- Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sports (CNMSS)
| | - K. Chamari
- Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sports (CNMSS)
- High Institute of Sport and Physical Education
| | - N. Souissi
- Research Laboratory “Sports Performance Optimization” National Center of Medicine and Science in Sports (CNMSS)
- High Institute of Sport and Physical Education
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Bouassida A, Chamari K, Zaouali M, Feki Y, Zbidi A, Tabka Z. Review on leptin and adiponectin responses and adaptations to acute and chronic exercise. Br J Sports Med 2008; 44:620-30. [DOI: 10.1136/bjsm.2008.046151] [Citation(s) in RCA: 156] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chaouachi A, Chamari K, Wong P, Castagna C, Chaouachi M, Moussa-Chamari I, Behm DG. Stretch and sprint training reduces stretch-induced sprint performance deficits in 13- to 15-year-old youth. Eur J Appl Physiol 2008; 104:515-22. [DOI: 10.1007/s00421-008-0799-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/05/2008] [Indexed: 11/29/2022]
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Abstract
The effect of Ramadan intermittent fasting (RIF) was studied on a battery of blood lipid markers in 15 elite judo athletes during a period when they were maintaining their training load without competing. Nine-to-twelve hours postprandial serum lipid and lipoproteins were measured on five occasions: before, three times during Ramadan, and three weeks post-Ramadan. Dietary data were collected using a 24-hour recall method for three days before, during and after the Ramadan month. Mean energy intake (12.9 MJ/d) remained similar throughout the study as did the macronutrient constituents of the diet. Mean body mass was slightly reduced (2 %; p < 0.01) by the end of Ramadan due mainly to a 0.65 +/- 0.68 kg decrease in body fat (p < 0.05). The RIF produced significant changes in some of the blood lipid levels: both HDL-C and LDL-C increased by 0.12 (p < 0.01) and 0.20 mmol . l (-1) (p < 0.05), respectively. During Ramadan, mean non-esterified fatty acid (NEFA) levels decreased from 0.73 to 0.28 mmol . l (-1) (p < 0.01) during the first week, then increased (p < 0.05) to 1.22 mmol . l (-1) over the middle of Ramadan and recovered to pre-Ramadan concentrations for the end and the post-Ramadan periods. Apolipoprotein A1 (Apo-A1) levels were significantly elevated at the end (p < 0.01) and the post-Ramadan periods (p < 0.05). Three weeks after Ramadan, blood levels of glucose, NEFA, Apo-A1, and Apo-B did not return to the values observed before Ramadan. In conclusion, the present results show that the combination of the change in diet pattern during Ramadan, along with intense exercise training, induced a significant decrease in body mass associated with a reduction in body fat and changes in some of the serum lipids and lipoproteins. Nevertheless, all the measured serum parameters remained within normal levels for young and active individuals. The volunteers, in this study, were able to maintain a constant training load during RIF.
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Affiliation(s)
- A Chaouachi
- Research Unit Evaluation, Sport, Santé, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia.
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