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Katsura Y, Takeda N, Inami T, Yamaguchi S, Takahashi S, Nakamura M, Nosaka K. Effects of lunges inserted in walking (eccentric walking) on lower limb muscle strength, physical and cognitive function of regular walkers. Eur J Appl Physiol 2024:10.1007/s00421-024-05453-y. [PMID: 38467835 DOI: 10.1007/s00421-024-05453-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Received: 12/29/2023] [Accepted: 02/13/2024] [Indexed: 03/13/2024]
Abstract
INTRODUCTION Walking is a popular exercise but does not increase lower limb muscle strength and balance. We hypothesized that muscle strength, physical and cognitive function would be improved by inserting lunges in conventional walking. METHODS Eleven regular walkers (54-88 years) who had more than 5000 steps in exercise walking a day at least 5 days a week participated in this study. They walked as usual for the first 4 weeks and included lunges and descending stairs or slope walking (i.e., eccentric walking) for the next 8 weeks. The steps of eccentric walking were gradually increased from 100 to 1000 steps per week over 8 weeks. RESULTS The average steps per day were 10,535 ± 3516 in the first 4 weeks, and 10,118 ± 3199 in the eccentric walking period without a significant difference. No significant changes in maximal voluntary isometric contraction torque of the knee extensors (MVC), 30-s chair stand (CS), 2-min step, balance assessed by center of pressure movement area with eyes close, sit and reach, a digit symbol substitution test (DSST) for cognitive function were observed in the first 4 weeks. However, significant (P < 0.05) improvements were evident in MVC (18.6 ± 15.7%), CS (24.2 ± 17.3%), balance ( - 45.3 ± 34.5%), and DSST (20.8 ± 16.7%) from weeks 4 to 12. Serum complement component 1q concentration decreased (P < 0.05) from weeks 4 to 12, although no changes in serum glucose, triglyceride, and cholesterol concentrations were observed. CONCLUSION These results supported the hypothesis, and suggest that eccentric walking provides effects that are not achieved by conventional walking.
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Affiliation(s)
- Yoshihiro Katsura
- Centre for Promotion of Higher Education, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan.
| | - Noriko Takeda
- Centre for Promotion of Higher Education, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Kohoku, Yokohama, Kanagawa, 223-8521, Japan
| | - Shota Yamaguchi
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Kohoku, Yokohama, Kanagawa, 223-8521, Japan
| | - Sho Takahashi
- Sports Science, Daito Bunka University, 1-9-1, Takashimadaira, Itabashi, Tokyo, 175-8571, Japan
| | - Masatoshi Nakamura
- Faculty of Rehabilitation Sciences, Nishi Kyushu University, 4490-9, Kanzaki, Saga, 842-8585, Japan
| | - Kazunori Nosaka
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA, 6027, Australia
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Chida K, Inami T, Yamaguchi S, Nishioka T, Yoshida Y, Kohtake N. Assessing the validity of two-dimensional video analysis for measuring lower limb joint angles during fencing lunge. Front Sports Act Living 2024; 6:1335272. [PMID: 38419910 PMCID: PMC10899431 DOI: 10.3389/fspor.2024.1335272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 01/22/2024] [Indexed: 03/02/2024] Open
Abstract
Introduction The fencing lunge (lunge), characterized by minimal body rotation, offers a movement well-suited for 2D video analysis. However, to the best of our knowledge, the validity of 2D video analysis for fencing has not been verified. This study aimed to validate 2D video analysis by comparing lower limb joints (hip, knee, and ankle joints) angles during lunge using both 2D video analysis and 3D motion analysis methods. Methods Twenty-two male fencers performed lunge trials that were simultaneously recorded using eight motion capture cameras (Qualisys Miqus M1) and two digital video cameras (Sony AX-450 and AX450a). Results The 2D video analysis results exhibited an extremely large correlation in knee joint angles of the front and rear legs in the sagittal with those from 3D motion analysis (r = 0.93-0.99). However, while a robust correlation was found between the ankle joint angles of the front and rear legs (r = 0.82-0.84), a large bias was also observed (-5.23° to -21.31°). Conversely, for the hip joints of the rear leg, a moderate correlation (r = 0.31) and a large bias (-10.89°) were identified. Conclusions The results of this study will contribute to the development of coaching using 2D video analysis in competition settings because such analysis can be a useful alternative to 3D motion analysis when measuring the knee joint angle of the front leg and rear leg in the sagittal plane. However, for the ankle joint angle, further research on the optimal shooting position and height of the digital video camera is needed, whereas for the hip joint angle, 3D motion analysis is recommended at this time.
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Affiliation(s)
- Kenta Chida
- Graduate School of System Design and Management, Keio University, Yokohama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Shota Yamaguchi
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Takuya Nishioka
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Yasumasa Yoshida
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Naohiko Kohtake
- Graduate School of System Design and Management, Keio University, Yokohama, Japan
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Inami T, Yamaguchi S, Nishioka T, Ishida H, Morito A, Yamada S, Nagata N, Murayama M. Relationships between Changes in Muscle Shear Modulus, Urinary Titin N- Terminal Fragment, and Maximum Voluntary Contraction Torque after Eccentric Exercise of the Elbow Flexors. J Sports Sci Med 2023; 22:797-805. [PMID: 38045754 PMCID: PMC10690499 DOI: 10.52082/jssm.2024.797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 11/27/2023] [Indexed: 12/05/2023]
Abstract
The study aimed to investigate the relationships between the shear modulus of the biceps brachii (BB) and brachialis muscle (BA) and the total of the two (BB+BA), and urinary titin N-terminal fragment (UTF), maximum voluntary isometric contraction (MVC), and other indirect markers. Fifteen healthy men performed five sets of 10 eccentric contractions using a dumbbell corresponding to 50% of MVC at 90° measured at baseline. The elbow joint of the left arm was extended from 90° to 180° (180° = full extension) in 5 s in the exercise, and was returned with support from the examiner to prevent concentric contraction. Shear modulus of BB and BA were measured by ultrasound shear wave elastography, and UTF, MVC, and range of motion of the elbow joint (ROM) were recorded before; immediately after; and 1, 24, 48, 72, 96, and 168 h after the exercise. After calculating the shear modulus of BB and BA, two values were added (BB+BA). The shear modulus peaked at 48 h, UTF peaked at 96 h, MVC and ROM changed largest at immediately, and muscle soreness peaked at 48 h post-exercise. Significant (p < 0.05) relationships were found between changes in BB shear modulus and BA shear modulus (r = 0.874), BB+BA shear modulus (r = 0.977), UTF (r = 0.681), and MVC (r = -0.538). Significant (p < 0.05) relationships were also observed between changes in BA shear modulus and BB+BA shear modulus (r = 0.957), UTF (r = 0.682), MVC (r = -0.522), and ROM (r = -0.600). Moreover, significant (p < 0.05) relationships were observed between changes in BB+BA shear modulus and UTF (r = 0.703), MVC (r = -0.549), and ROM (r = -0.547). These results indicate that shear modulus of each muscle (i.e., BB and BA) provide more precise information about muscle damage than UTF, MVC and ROM.
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Affiliation(s)
| | | | | | | | | | | | - Naoya Nagata
- Institute of Physical Education, Keio University, Japan
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Inami T, Yamaguchi S, Nishioka T, Chida K, Hoshina K, Ito O, Hashimoto T, Murayama M. The Effect of Contrast Water Therapy on Dehydration during Endurance Training Camps in Moderate-Altitude Environments. Sports (Basel) 2023; 11:232. [PMID: 38133099 PMCID: PMC10747241 DOI: 10.3390/sports11120232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/03/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
The effects of contrast water therapy (CWT) on dehydration at moderate altitudes during training camps remain unknown. We hypothesized that CWT reduces dehydration resulting from training at moderate altitudes and improves performance, akin to conditions at sea level. A 13-day endurance training camp was held at a moderate altitude of 1100 m and included 22 university athletes, who were divided into two groups (CWT group, n = 12; control (CON) group, n = 10). The sample size was calculated based on an α level of 0.05, power (1 β) of 0.8, and effect size of 0.25 based on two-way ANOVA. Longitudinal changes over 13 days were compared using a two-group comparison model. Additionally, 16 athletes participated in an additional performance verification analysis. Subjective fatigue, body mass, and water content (total body water (TBW), extracellular water (ECW), and intracellular water) were measured using bioimpedance analysis every morning, and the titin N-terminal fragment in urine (UTF) was measured as an index of muscle damage. For performance verification, 10 consecutive jump performances (with the reactive strength index (RSI) as an indicator) were evaluated as neuromuscular function indices. The results indicated that the UTF did not significantly differ between the two groups. Moreover, the ECW/TBW values, indicative of dehydration, on days 4 and 5 in the CWT group were significantly lower than those in the CON group. However, there was no significant difference in RSI between the two groups. Therefore, although CWT reduces dehydration in the early stages of the training camp, it may not affect performance.
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Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Shota Yamaguchi
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Takuya Nishioka
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Kenta Chida
- Graduate School of System Design, Management, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Kosaku Hoshina
- Graduate School of Media and Governance, Keio University, 5322, Fujisawa 252-0883, Japan
| | - Osamu Ito
- Sports Medicine Research Center, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
- FOCS Inc., 1-3-47, Nakahara-Ward, Kawasaki 211-0025, Japan
| | - Takeshi Hashimoto
- Sports Medicine Research Center, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
| | - Mitsuyoshi Murayama
- Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 223-8521, Japan
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Soga T, Yamaguchi S, Inami T, Saito H, Hakariya N, Nakaichi N, Shinohara S, Akiyama K, Hirose N. The Validity and Reliability of a Smartphone Application for Break-Point Angle Measurement during Nordic Hamstring Exercise. Int J Sports Phys Ther 2023; 18:917-922. [PMID: 37547835 PMCID: PMC10399091 DOI: 10.26603/001c.83936] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 12/30/2022] [Accepted: 05/24/2023] [Indexed: 08/08/2023] Open
Abstract
Background A recently developed smartphone application (Nordic Angle) allows the automatic calculation of the break-point angle (BPA) during Nordic hamstring exercise (NHE) without transferring the collected data to a computer. The BPA is the point at which the hamstrings are unable to withstand force. However, the validity of the BPA values obtained by this method has not been examined. Hypothesis/Purpose This study aimed to evaluate the validity and reliability of the Nordic Angle by comparing the BPA values of the Nordic Angle with those of two-dimensional motion analysis software that can calculate the angles and angular velocities of various joints. Study Design Cohort assessing Validity and Reliability. Methods The validity of the Nordic Angle BPA data was verified by Spearman's correlation test for consistency with the movement analysis data, and the magnitude of the correlation was indicated by rs. The agreement between these measurements was examined using the Bland-Altman analysis. The reliability of the Nordic Angle and motion analysis was examined using the intraclass correlation coefficient (ICC) (1,k) based on data from repeated trials within a day. Results Although the spearman correlation between the Nordic angle and the angle determined using motion analysis did not reach statistical significance (p = 0.052), a very large correlation was present (rs = 0.75). The difference between the mean values of the Nordic Angle and motion analysis was 0.4 ± 2.1°, and the limits of agreement ranged from -3.9° to 4.6°. In two BPA measurements, the Nordic Angle showed perfect reliability (ICC = 1.00, p < 0.001), while motion analysis showed nearly perfect reliability (ICC = 0.97, p < 0.001). Conclusion The Nordic Angle, which has both validity and reliability, may be appropriate for field measurement because it allows immediate feedback of BPA and the measurement of many athletes. Level of evidence 3b©The Author(s).
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Affiliation(s)
| | | | | | - Hiromi Saito
- Graduate School of Sport Sciences Waseda University
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Fukano M, Nakagawa K, Higashihara A, Inami T, Narita T. Damage and recovery of the intrinsic and extrinsic foot muscles from running a full marathon. Scand J Med Sci Sports 2023. [PMID: 37102625 DOI: 10.1111/sms.14377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 03/25/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023]
Abstract
PURPOSE To investigate the effects of full marathon running on intrinsic and extrinsic foot muscle damage and to determine the relationship with the height change of the longitudinal foot arch following full marathon completion. METHODS Magnetic resonance imaging-measured transverse relaxation time (T2 ) of the abductor hallucis (ABH), flexor digitorum brevis (FDB) and quadratus plantae (QP), flexor digitorum longus (FDL), tibialis posterior (TP), and flexor hallucis longus (FHL) from 22 collegiate runners were assessed before and 1, 3, and 8 days after full marathon running. The three-dimensional foot posture of 10 of the 22 runners was further obtained using a foot scanner system before and 1, 3, and 8 days after the marathon. RESULTS Marathon-induced increases in T2 were observed in the QP, FDL, TP, and FHL 1 day after the marathon (+7.5%, +4.7%, +6.7%, and +5.9%, respectively), with the increased T2 of TP persisting until 3 days after the marathon (+4.6%). T2 changes of FDL and FHL from pre-marathon to DAY 1 showed direct correlations with the corresponding change in the arch height ratio (r = 0.823, p = 0.003, and r = 0.658, p = 0.038). CONCLUSION The damage and recovery response from a full marathon differed among muscles; QP, FDL, TP, and FHL increased T2 after the marathon, whereas ABH and FDB did not. In addition, T2 changes in FDL and FHL and the arch height ratio change were correlated. Our results suggest that the extrinsic foot muscles could be more susceptible to damage than the intrinsic during marathon running.
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Affiliation(s)
- Mako Fukano
- College of Engineering, Shibaura Institute of Technology, Saitama, Japan
| | - Kento Nakagawa
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - Ayako Higashihara
- Institute of Physical Education, Keio University, Yokohama, Kanagawa, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Kanagawa, Japan
| | - Takaya Narita
- Faculty of Culture and Sport Policy, Toin University of Yokohama, Yokohama, Kanagawa, Japan
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Inami T, Yamaguchi S, Kim HK, Murayama M. Localized-bioelectrical impedance vector analysis on mechanical property changes after muscle injury and damage. J Sports Med Phys Fitness 2023; 63:509-510. [PMID: 36169396 DOI: 10.23736/s0022-4707.22.14416-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan -
| | - Shota Yamaguchi
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Hyeon-Ki Kim
- Institute of Physical Education, Keio University, Yokohama, Japan
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Inami T, Yamaguchi S, Ishida H, Kohtake N, Morito A, Yamada S, Shimomasuda M, Haramoto M, Nagata N, Murayama M. Changes in Muscle Shear Modulus and Urinary Titin N-Terminal Fragment after Eccentric Exercise. J Sports Sci Med 2022; 21:536-544. [PMID: 36523897 PMCID: PMC9741722 DOI: 10.52082/jssm.2022.536] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 10/10/2022] [Indexed: 12/24/2022]
Abstract
This study aimed to investigate the relationship between the muscle shear modulus of the biceps brachii, urinary titin N-terminal fragment (UTF), and other damage markers after eccentric exercise. Seventeen healthy males performed five sets of ten eccentric exercises with dumbbells weighing 50% of the maximum voluntary contraction (MVC) at the elbow joint. Muscle shear modulus with range of interest set to only biceps brachii muscle measured by ultrasound shear wave elastography, UTF, MVC, range of motion (ROM), and soreness (SOR) were recorded before, immediately after, and 1, 24, 48, 72, 96, and 168 h after eccentric exercise. Each marker changed in a time course pattern, as found in previous studies. The peak shear modulus showed a moderate negative correlation with peak MVC (r = -0.531, P < 0.05) and a strong positive correlation with peak UTF (r = 0.707, P < 0.01). Our study results revealed a significant relationship between muscle strength, shear modulus measured by ultrasound SWE, and titin measured by UTF, as a non-invasive damage marker after eccentric exercise to track changes in EIMD.
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Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, Japan, Senior Assistant Professor, Institute of Physical Education, Keio University, 4-1-1, Hiyoshi, Yokohama 2238521 Japan
| | | | | | - Naohiko Kohtake
- Graduate School of System Design Management, Keio University, Japan
| | - Akihisa Morito
- Graduate School of System Design Management, Keio University, Japan,Taisho Pharmaceutical Co., Ltd.Japan
| | | | | | | | - Naoya Nagata
- Institute of Physical Education, Keio University, Japan
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Kim HK, Radak Z, Takahashi M, Inami T, Shibata S. Chrono-exercise: Time-of-day-dependent physiological responses to exercise. Sports Medicine and Health Science 2022; 5:50-58. [PMID: 36994180 PMCID: PMC10040331 DOI: 10.1016/j.smhs.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/10/2022] [Accepted: 11/22/2022] [Indexed: 12/05/2022] Open
Abstract
Exercise is an effective strategy to prevent and improve obesity and related metabolic diseases. Exercise increases the metabolic demand in the body. Although many of the metabolic health benefits of exercise depend on skeletal muscle adaptations, exercise exerts many of its metabolic effects through the liver, adipose tissue, and pancreas. Therefore, exercise is the physiological state in which inter-organ signaling is most important. By contrast, circadian rhythms in mammals are associated with the regulation of several physiological and biological functions, including body temperature, sleep-wake cycle, physical activity, hormone secretion, and metabolism, which are controlled by clock genes. Glucose and lipid tolerance reportedly exhibit diurnal variations, being lower in the evening than in the morning. Therefore, the effects of exercise on substrate metabolism at different times of the day may differ. In this review, the importance of exercise timing considerations will be outlined, incorporating a chrono-exercise perspective.
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Naka Y, Inami T, Takeuchi K, Kikuchi H, Goda A, Kohno T, Soejima K. Prevalence and implications of exercise pulmonary hypertension in chronic thromboembolic pulmonary disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Recent international statement on chronic thromboembolic pulmonary hypertension proposed the definition of chronic thromboembolic pulmonary disease (CTEPD) and advocated further research regarding its clinical characteristic, natural history, and therapeutic strategy. Exercise pulmonary hypertension (Ex-PH) has been considered a mild degree of pulmonary hypertension (PH) among patients with normal pulmonary hemodynamics at rest. However, the clinical significance of Ex-PH in CTEPD remains unknown.
Purpose
In the patients with CTEPD, we aimed to verify 1) the prevalence and clinical profiles of Ex-PH, 2) effect of BPA on pulmonary vascular response after exercise in Ex-PH, 3) long-term clinical outcomes of conservative management in non-Ex-PH.
Methods
We retrospectively reviewed 26 patients with CTEPD (median age 65 years, 38% male), who underwent cardiopulmonary exercise test with right heart catheterization (CPET-RHC). The definitions of CTEPD are the following 1) pulmonary artery occlusion due to organic thrombus confirmed by imaging studies after ≥3 months of anticoagulation, 2) mPAP<25 mmHg and PAWP≤15 mmHg at rest. PQslope was plotted using multipoint plots. Ex-PH was defined by PQ slope>3.0, and the patients were divided into Ex-PH and non-Ex PH groups. Clinical profiles and long-term outcomes were compared between two groups. The patients in Ex-PH groupunderwent CPET-RHC 6–12 months after balloon pulmonary angioplasty (BPA). In Non-Ex-PH group, serial measurements of echocardiography were performed.
Results
Overall, 5 and 21 patients were categorized as CTEPD with PH (mPAP 21–24mmHg) and without PH (mPAP≤20mmHg), and 14 and 12 were categorized Ex-PH and non-Ex-PH groups, respectively. Although all 5 patients with CTEPD with PH were classified as Ex-PH group (Figure 1), there was no significant difference in baseline hemodynamics at rest between Ex-PH and non-Ex-PH groups (mPAP: 19.5 [18.4–20.6] vs. 17.7 [16.6–18.9] mmHg, PVR: 2.2 [1.7–2.7] vs. 2.3 [1.9–2.8] wood units, P>0.05, respectively). PQ slope was significantly higher in Ex-PH group (4.6 [3.2–6.0] vs. 1.31 [0.2–2.8], p=0.002). There were no differences in respiratory function test, blood gas analysis, and 6-minute walk distance between two groups. There were no major adverse events such as all-cause mortality and hospitalization for PH in overall cohort. Among Ex-PH group, BPA decreased PQslope (4.8 [3.6–6.4] to 2.3 [1.9–3.0], p<0.05). Among no-Ex-PH group, there was no significant change in tricuspid regurgitation pressure gradient (28 [17–33] to 27 [21–36] mmHg, p>0.05) over the 997 [651–1451] days.
Conclusion
Ex-PH was common in patients with CTEPD, and there were no clinical profiles differentiating Ex-PH from non-Ex-PH, except parameters of CPET-RHC. BPA improved an abnormal pulmonary vascular response to exercise in Ex-PH. The conservative management in non-Ex-PH was feasible. Randomized clinical trials will be needed to further investigate this treatment strategy.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Naka
- Kyorin University, Mitaka , Tokyo , Japan
| | - T Inami
- Kyorin University, Mitaka , Tokyo , Japan
| | - K Takeuchi
- Kyorin University, Mitaka , Tokyo , Japan
| | - H Kikuchi
- Kyorin University, Mitaka , Tokyo , Japan
| | - A Goda
- Kyorin University, Mitaka , Tokyo , Japan
| | - T Kohno
- Kyorin University, Mitaka , Tokyo , Japan
| | - K Soejima
- Kyorin University, Mitaka , Tokyo , Japan
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Morito A, Inami T, Hirata A, Yamada S, Shimomasuda M, Haramoto M, Kato K, Tahara S, Oguma Y, Ishida H, Kohtake N. Ice slurry ingestion improves physical performance during high-intensity intermittent exercise in a hot environment. PLoS One 2022; 17:e0274584. [PMID: 36107972 PMCID: PMC9477354 DOI: 10.1371/journal.pone.0274584] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 08/30/2022] [Indexed: 12/03/2022] Open
Abstract
Ice slurry ingestion enhances exercise performance by lowering the core body temperature. However, an operational issue related to this ingestion is the requirement for a high intake of 7.5 g·kg-1 to produce the desired effects. We investigated the effects of the intake of low amounts of ice slurry at −2°C on the tympanic temperature and exercise performance during repeated high-intensity intermittent exercises in a hot environment. This study was a randomized, crossover study, with a 6-day washout period. Twelve university rugby union players performed two 30-min sessions of high-intensity intermittent exercises separated by a 15-min half-time break on a cycle ergometer in a hot environment (28.8°C ± 0.1°C, 49.5% ± 0.6% relative humidity). The participants ingested 450 g of −2°C-ice slurry (ICE), or a 30°C-beverage (CON) having the same composition as ICE, or 30°C-water (WAT) during the half-time break. The tympanic temperature and skin temperature were measured as the physiological data, and the peak power and mean power as the exercise performance data. The tympanic temperature at the half-time break and beginning of the 2nd session was significantly lower in the ICE group as compared with the CON and WAT groups. The skin temperature at the half-time break was significantly lower in the ICE group as compared with the WAT group. While the peak power and mean power during the 2nd session were significantly greater in the ICE group as compared with the CON and WAT groups. Our findings suggest that even the intake of lower amounts, as compared with those used in previous studies, of low-temperature ice slurry can reduce the body temperature and improve the peak power. These results suggest that intake of low-temperature ice slurry as a strategy for internal body cooling is useful for improving endurance exercise performance in hot environments.
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Affiliation(s)
- Akihisa Morito
- Graduate School of System Design and Management, Keio University, Kanagawa, Japan
- R&D Laboratories, Self-Medication, Taisho Pharmaceutical Co., Ltd., Saitama, Japan
- * E-mail:
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Kanagawa, Japan
| | - Akihiro Hirata
- Graduate School of System Design and Management, Keio University, Kanagawa, Japan
- Sports Medicine Research Center, Keio University, Kanagawa, Japan
| | - Satoshi Yamada
- R&D Laboratories, Self-Medication, Taisho Pharmaceutical Co., Ltd., Saitama, Japan
| | - Masatsugu Shimomasuda
- Research & Development Headquarters, Self-Medication, Taisho Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Maki Haramoto
- Research & Development Headquarters, Self-Medication, Taisho Pharmaceutical Co., Ltd., Tokyo, Japan
| | - Keita Kato
- R&D Laboratories, Self-Medication, Taisho Pharmaceutical Co., Ltd., Saitama, Japan
| | - Shigeyuki Tahara
- Graduate School of System Design and Management, Keio University, Kanagawa, Japan
| | - Yuko Oguma
- Sports Medicine Research Center, Keio University, Kanagawa, Japan
| | - Hiroyuki Ishida
- Sports Medicine Research Center, Keio University, Kanagawa, Japan
| | - Naohiko Kohtake
- Graduate School of System Design and Management, Keio University, Kanagawa, Japan
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12
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Murayama M, Inami T, Shima N, Yoneda T, Nosaka K. Changes in biceps brachii muscle hardness assessed by a push-in meter and strain elastography after eccentric versus concentric contractions. Sci Rep 2022; 12:9214. [PMID: 35655084 PMCID: PMC9163354 DOI: 10.1038/s41598-022-13184-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/20/2022] [Indexed: 11/17/2022] Open
Abstract
Changes in biceps brachii muscle hardness assessed by a push-in meter (PM) and strain elastography (SE) were compared between eccentric (ECC) and concentric contractions (CON) of the elbow flexors to test the hypothesis that muscle hardness would increase greater after ECC. Ten men performed 5 sets of 10 ECC with their non-dominant arms and 5 sets of 10 CON with their dominant arms using a dumbbell corresponding to 50% of maximum voluntary isometric contraction (MVIC) force at 90º elbow flexion. Before and 1–4 days after the exercise, MVIC force, elbow joint angles, upper-arm circumference, and muscle soreness as muscle damage makers, and biceps brachii muscle hardness at maximally extended elbow joint by PM and SE were measured. Changes in these measures over time were compared between ECC and CON. All muscle damage markers showed greater changes after ECC than CON (p < 0.001). Muscle hardness assessed by PM and SE increased (p < 0.05) and peaked at 4 days post-ECC with 154.4 ± 90.0% (PM) and 156.2 ± 64.2% (SE) increases from the baseline, but did not change significantly after CON. The changes in muscle hardness post-ECC were correlated between PM and SE (r = 0.752, p < 0.001). A correlation (p < 0.001) between the normalized changes in resting elbow joint angle and changes in muscle hardness assessed by PM (r = − 0.772) or SE (r = − 0.745) was also found. These results supported the hypothesis and suggest that the increases in muscle hardness after ECC were associated with muscle damage (increased muscle stiffness), and PM and SE detected muscle hardness changes similarly.
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Affiliation(s)
- Mitsuyoshi Murayama
- Institute of Physical Education, Keio University, Address 4-1-1, Hiyoshi, Kouhoku-ku, Yokohama, 223-8521, Japan.
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Address 4-1-1, Hiyoshi, Kouhoku-ku, Yokohama, 223-8521, Japan
| | - Norihiro Shima
- Department of Sport and Health Science, School of Sport and Health Science, Tokai Gakuen University, Aichi, Japan
| | - Tsugutake Yoneda
- Department of Physiology, School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - Kazunori Nosaka
- Centre for Human Performance, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
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13
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Kim HK, Furuhashi S, Takahashi M, Chijiki H, Nanba T, Inami T, Radak Z, Sakamoto S, Shibata S. Late-afternoon endurance exercise is more effective than morning endurance exercise at improving 24-h glucose and blood lipid levels. Front Endocrinol (Lausanne) 2022; 13:957239. [PMID: 35928886 PMCID: PMC9343590 DOI: 10.3389/fendo.2022.957239] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Glucose and lipid tolerance reportedly exhibit diurnal variations, being lower in the evening than in the morning. Therefore, the effects of exercise on glucose and blood lipid levels at different times of the day may differ. This study aimed to investigate the effects of short-term endurance exercise intervention in the morning versus late afternoon on 24-h blood glucose variability and blood lipid levels. METHODS Twelve healthy young men participated in a randomized crossover trial. The participants were assigned to morning (09:00-11:00) or late afternoon (16:00-18:00) endurance exercise for a week, consisting of supervised exercise sessions on Mondays, Wednesdays, and Fridays. In the morning and evening trials, the participants walked for 60 min on a treadmill at approximately 60% of maximal oxygen uptake (VO2max). Following a 2-week wash-out period, the participants performed the exercise training regimen at another time point. Continuous glucose monitoring was used to evaluate blood glucose fluctuations during each 24-h trial period. Blood samples were collected before and after each intervention to examine blood lipid and hormonal responses. RESULTS Examination of the area under the curve (AUC) of the glucose level changes for 24 h after the late afternoon versus morning exercise intervention revealed significantly lower values for the former versus the latter (P < 0.01). The AUC of glucose level changes after each meal was also lower after the late afternoon versus morning intervention, and significantly lower values were observed in the late afternoon versus morning trial for breakfast and dinner (P < 0.05, P < 0.01). In addition, a significant decrease in triglycerides (TG) and TG/high-density lipoprotein cholesterol (HDL-C) was noted after versus before the late afternoon intervention (P < 0.05). CONCLUSIONS These results suggest that late afternoon endurance exercise is more effective than morning endurance exercise at improving 24-h glucose and triglyceride levels.
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Affiliation(s)
- Hyeon-Ki Kim
- Faculty of Science and Engineering, Waseda University, Tokyo, Japan
- Institute of Physical Education, Keio University, Yokohama, Japan
- *Correspondence: Hyeon-Ki Kim,
| | - Shota Furuhashi
- Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Masaki Takahashi
- Institute for Liberal Arts, Tokyo Institute of Technology, Tokyo, Japan
| | - Hanako Chijiki
- Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Takuya Nanba
- Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Zsolt Radak
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
- Research Center for Molecular Exercise Science, University of Physical Education, Budapest, Hungary
| | - Shizuo Sakamoto
- Faculty of Sport Sciences, Surugadai University, Saitama, Japan
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14
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Yoshimura A, Inami T, Schleip R, Mineta S, Shudo K, Hirose N. Effects of Self-myofascial Release Using a Foam Roller on Range of Motion and Morphological Changes in Muscle: A Crossover Study. J Strength Cond Res 2021; 35:2444-2450. [PMID: 31136541 DOI: 10.1519/jsc.0000000000003196] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
ABSTRACT Yoshimura, A, Inami, T, Schleip, R, Mineta, S, Shudo, K, and Hirose, N. Effects of self-myofascial release using a foam roller on range of motion and morphological changes in muscle: a crossover study. J Strength Cond Res 35(9): 2444-2450, 2021-Self-myofascial release using a foam roller (FR) is effective in improving range of motion (ROM) in at least some conditions. However, its mechanism is still unclear. Therefore, this study investigated potential acute muscle morphological changes after the FR intervention and aimed to clarify the mechanism of increases in ROM by the FR intervention. We hypothesized that the FR intervention may increase ROM because of changes in fascicle length (FL) and aponeurosis displacement. This crossover study, involving 22 male university students (21.5 ± 1.3 years, 170.6 ± 4.0 cm, and 64.1 ± 8.9 kg; mean ± SD), compared the FR intervention targeting the gastrocnemius muscle with the control trial. The outcome measures were maximum passive ankle ROM, morphology of the gastrocnemius muscle (FL and aponeurosis displacement) during passive ankle plantar flexor movement, degree of pain during the FR intervention, and sensation of the triceps surae muscle. Although ROM of both dorsiflexion and plantar flexion increased significantly after the FR intervention (p < 0.01), no significant differences were found in FL and aponeurosis displacement before and after the FR intervention. The mean perception of pain during the FR intervention was rated as "slightly uncomfortable," corresponding to a 2.3 ± 2.4-cm on a 9.5-cm visual analog scale. We found that the FR intervention did not influence the morphology of muscle. It is necessary to investigate other factors related to ROM as the next step of this study.
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Affiliation(s)
- Akane Yoshimura
- Graduate School of Sport Sciences, Waseda University, Nishitokyo, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Robert Schleip
- Fascia Research Group, Department of Neuroanesthesiology, Neurosurgical Clinic, Ulm University, Guenzburg, Germany
| | - Shinshiro Mineta
- Graduate School of Sport Sciences, Waseda University, Nishitokyo, Japan
| | - Kohei Shudo
- Sinior High School, Waseda University, Nerimaku, Japan ; and
| | - Norikazu Hirose
- Faculty of Sport Sciences, Waseda University, Nishitokyo, Japan
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15
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Fukano M, Nakagawa K, Inami T, Higashihara A, Iizuka S, Narita T, Maemichi T, Yoshimura A, Yamaguchi S, Iso S. Increase in foot arch asymmetry after full marathon completion. J Sports Sci 2021; 39:2468-2474. [PMID: 34120573 DOI: 10.1080/02640414.2021.1939965] [Citation(s) in RCA: 0] [Impact Index Per Article: 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
Long-distance running results in lowering of the foot medial longitudinal arch, but it is unknown whether the left and right arches decrease equally. This study aimed to determine whether foot arch asymmetry increases upon completion of a full marathon and to identify factors capable of explaining the degree of asymmetry of navicular height and navicular height displacement. The three-dimensional foot posture data of 74 collegiate runners were obtained using an optical foot scanner system before (PRE) and immediately after (POST) a full marathon. The navicular height and arch height ratio (normalised navicular height by foot length) of both feet significantly decreased from PRE to POST full marathon completion (44.3 ± 6.3 mm versus 40.8 ± 6.5 mm, 17.8 ± 2.5 versus 16.6 ± 2.7, respectively; p < 0.001, both). The asymmetry of the arch height ratio was significantly greater POST than PRE marathon. Multiple linear regression analysis indicated that the POST-race Asymmetry Index (AI) of navicular height was significantly predicted by the PRE-race AI of navicular height; navicular height displacement was predicted by PRE-race navicular height and the marathon time. Full marathon running induced increasing asymmetry and lowering of the medial longitudinal arch in runners.
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Affiliation(s)
- Mako Fukano
- College of Engineering, Shibaura Institute of Technology, Saitama, Japan.,Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - Kento Nakagawa
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Kanagawa, Japan
| | | | - Satoshi Iizuka
- Department of Sport Sciences, Japan Institute of Sport Sciences, Tokyo, Japan
| | - Takaya Narita
- Faculty of Culture and Sport Policy, Toin University of Yokohama, Kanagawa, Japan
| | | | - Akane Yoshimura
- Graduate School of Sport Sciences, Waseda University, Saitama, Japan
| | - Shota Yamaguchi
- Graduate School of System Design and Management, Keio University, Kanagawa, Japan
| | - Shigeo Iso
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
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16
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Mineta S, Inami T, Hoshiba T, Higashihara A, Kumai T, Torii S, Hirose N. Greater knee varus angle and pelvic internal rotation after landing are predictive factors of a non-contact lateral ankle sprain. Phys Ther Sport 2021; 50:59-64. [PMID: 33894569 DOI: 10.1016/j.ptsp.2021.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 12/24/2022]
Abstract
OBJECTIVES This study aimed to clarify the kinematic, kinetic characteristics associated with lateral ankle sprain. DESIGN A 16-month prospective cohort study. SETTING Laboratory. PARTICIPANTS A total of 179 college athletes. MAIN OUTCOME MEASURES Joint kinematics, moment during single-leg landing tasks, and ankle laxity were measured. The attendance of each participating team, injury mechanism, existence of body contact, presence of orthosis, with or without medical diagnosis, and periods of absence were recorded. RESULTS Twenty-nine participants incurred lateral ankle sprain during non-contact motion. The Cox regression analysis revealed that greater knee varus peak angle (hazard ratio: 1.16 [95% confidence interval: 1.10-1.22], p < 0.001) and greater pelvic internal rotation peak angle toward the support leg were associated with lateral ankle sprain (hazard ratio: 1.08 [95% confidence interval: 1.02-1.15], p = 0.009). The cut-off values for each predictive factor were -0.17° (area under the curve = 0.89, p < 0.001) and 6.63° (area under the curve = 0.74, p < 0.001), respectively. CONCLUSIONS A greater knee varus peak angle and pelvic internal rotation peak angle after single-leg landing are predictive factors for lateral ankle sprain.
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Affiliation(s)
- Shinshiro Mineta
- Graduate School of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Tokyo, Japan; Research Fellowships for Young Scientists, Japan Society for the Promotion of Science, Chiyoda-ku, Kojimachi, Japan.
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Hiyoshi, Yokohama, Japan.
| | - Takuma Hoshiba
- Waseda Institute for Sport Sciences, Waseda University, Mikajima, Tokorozawashi, Saitama, Japan.
| | - Ayako Higashihara
- Institute of Physical Education, Keio University, Hiyoshi, Yokohama, Japan; Faculty of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Tokyo, Japan.
| | - Tsukasa Kumai
- Faculty of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Tokyo, Japan.
| | - Suguru Torii
- Faculty of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Tokyo, Japan.
| | - Norikazu Hirose
- Faculty of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Tokyo, Japan.
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17
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Yoshimura A, Sekine Y, Schleip R, Furusyo A, Yamazaki K, Inami T, Murayama M, Hirose N. The acute mechanism of the self-massage-induced effects of using a foam roller. J Bodyw Mov Ther 2021; 27:103-112. [PMID: 34391221 DOI: 10.1016/j.jbmt.2021.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 02/09/2021] [Accepted: 02/28/2021] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Maintaining flexibility, often defined as range of motion (ROM), is important. Recently, self-massage using a foam roller (FR) has been used in clinical and/or sports settings to effectively and immediately improve ROM. Many studies have found significant increases in ROM following the FR intervention; however, the mechanism of the effect is unclear. We aimed to clarify this mechanism regarding the ROM effects following the FR intervention by evaluating local tissue and autonomic nervous system responses. METHOD The study employed a crossover design that included a comparison between non-intervention (CON trial: left leg) and intervention (FR trial: right leg) groups. Fourteen volunteers participated. Nine outcomes (passive maximum ankle ROM [ROM with a specified and non-specified passive strength], tissue hardness, skin temperature, water contents, circumference, blood flow velocity, pressure pain threshold, autonomic nervous system, and heart rate) were investigated before (PRE) and 0 min (POST0), 20 min (POST20), 40 min (POST40), and 60 min (POST60) post intervention. RESULTS Skin temperature, impedance, and circumference changed significantly following the intervention, and increased ROM with non-specified strength was observed. DISCUSSION Although we found that the FR intervention influenced skin temperature, impedance, circumference, and ROM, adaptability to the intervention may differ depending on an individual's characteristics. Females and/or individuals with a high body water content could obtain greater positive ROM effects than males and/or individuals with a low body water content. CONCLUSION These findings suggest that the FR intervention may be an effective method to improve ROM, with alterations of skin temperature, impedance, and circumference.
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Affiliation(s)
- Akane Yoshimura
- Graduate School of Sport Sciences, Waseda University, Japan.
| | - Yuta Sekine
- Faculty of Modern Life, Teikyo Heisei University, Japan.
| | - Robert Schleip
- Department of Sport and Health Sciences, Technical University of Munich, Germany.
| | - Atsuya Furusyo
- Graduate School of Sport Sciences, Waseda University, Japan.
| | - Kazuya Yamazaki
- Graduate School of Sport Sciences, Waseda University, Japan.
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Japan.
| | | | - Norikazu Hirose
- Faculty of Sport Sciences, Waseda University, 3-4-1, Higashifushimi, Nishitokyo City, Tokyo, 2020021, Japan.
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18
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Yoshida Y, Inami T, Takase T. Body composition of collegiate kendo players. J Sports Med Phys Fitness 2021; 61:1430-1431. [PMID: 33615767 DOI: 10.23736/s0022-4707.21.12352-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yasumasa Yoshida
- Institute of Physical Education, Keio University, Hiyoshi, Japan -
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Hiyoshi, Japan
| | - Takeshi Takase
- Department of Law, Toin University of Yokohama, Yokohama, Japan
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19
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Nakata C, Goda A, Takeuchi K, Kikuchi H, Inami T, Soejima K, Satoh T. Leg raise can detect exercise-induced pulmonary arterial wedge pressure elevation. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Exercise-induced elevation of pulmonary arterial wedge pressure (PAWP) may show preclinical or exercise-induced left ventricular diastolic dysfunction. Invasive hemodynamic assessment during provocative maneuvers, like exercise and volume challenge, in these patients allows greater sensitivity to diagnose or exclude HFpEF. The aim of this study was to examine how the leg raise, which is a simple way to increase preload, can detect exercise-induced PAWP elevation.
Methods
Four hundred seventy-nine patients (60±14y.o, mean pulmonary arterial pressure (PAP) 19mmHg, PAWP 8mmHg, CTEPH /IPAH/CTD-PH/SOB unknown reason: 357/56/38/28pts) with near-normal PAP and normal PAWP at rest underwent symptom-limited exercise test using supine cycle ergometer with right heart catheter. Exercise-induced elevation in PAWP of over 20mmHg was defined as exercise-induced elevation group.
Results
ΔPAWP (after leg raise - rest) in the exercise-induced elevation group was significantly higher (6.0±4.1 vs. 2.7±3.9mmHg, p<0.001, in the older (age≥60y.o) group (n=276); 3.4±3.5 vs. 1.9±3.4mmHg, p<0.001, in the younger (age<60y.o) group (n=203)) than that in the non-elevation group after legs raise for cycle ergometer exercise. The area under the ROC curve for ΔPAWP was 0.72 (95% CI: 0.65–0.78) in the older and 0.64 (95% CI: 0.53–0.75) in the younger. In the older, the cut-off value for detect exercise-induced PAWP elevation of ΔPAWP was 4mmHg, with 72% sensitivity and 58% specificity. On the other hand, in the younger, the cut-off value was 3mmHg, with 69% sensitivity and 59% specificity.
Conclusion
Leg raise can easily detect occult left ventricular diastolic dysfunction.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- C Nakata
- Kyorin University Hospital, Tokyo, Japan
| | - A Goda
- Kyorin University Hospital, Tokyo, Japan
| | - K Takeuchi
- Kyorin University Hospital, Tokyo, Japan
| | - H Kikuchi
- Kyorin University Hospital, Tokyo, Japan
| | - T Inami
- Kyorin University Hospital, Tokyo, Japan
| | - K Soejima
- Kyorin University Hospital, Tokyo, Japan
| | - T Satoh
- Kyorin University Hospital, Tokyo, Japan
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20
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Nakata C, Takeuchi K, Kikuchi H, Goda A, Inami T, Satoh T, Soejima K. Comparison of pulmonary vascular resistance and pulmonary artery compliance during exercise between IPAH and CTEPH with normal pulmonary artery pressure. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Pulmonary vascular resistance (PVR) and pulmonary artery compliance (PAC) are inversely related. However, the little is known about dynamics during exercise by disease difference. The aim of this study was to reveal the relationships of PVR and PAC during exercise between idiopathic pulmonary arterial hypertension (IPAH) and chronic thromboembolic pulmonary hypertension (CTEPH) patients.
Methods
Sixty-two IPAH patients (45±9 y.o) and 359 CTEPH patients (63±13 y.o) with normal mean PAP and PAWP at rest underwent symptom-limited exercise test using supine cycle ergometer with right heart catheter.
Results
There were no differences between baseline mean PAP and PAWP in 2 groups, however, cardiac output, SaO2 and SvO2 were lower in CTEPH group. Lower PAC (2.9±1.1 vs. 3.7±1.7 ml/mmHg, p<0.001) and higher PVR (2.3±1.0 vs. 1.9±1.0 wood.unit, p=0.016) were observed in CTEPH group. These trends were also seen at peak exercise. PVR-PAC relationship in CTEPH group was leftward shift compared with IPAH group (Figure 1).
Conclusion
Resting and exercise PVR and PAC in CTEPH patients were worse than those in IPAH patients who had normal PAP and PAWP at rest.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- C Nakata
- Kyorin University, Mitaka, Japan
| | | | | | - A Goda
- Kyorin University, Mitaka, Japan
| | - T Inami
- Kyorin University, Mitaka, Japan
| | - T Satoh
- Kyorin University, Mitaka, Japan
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21
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Nagamatsu Y, Inami T, Nakata C, Takeuchi K, Kikuchi H, Goda A, Soejima K, Satoh T. Usefulness of peripheral-pressure-directed balloon pulmonary angioplasty for chronic thromboembolic pulmonary hypertension. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Balloon pulmonary angioplasty (BPA) in expert center may be considered in patients with chronic thromboembolic pulmonary hypertension (CTEPH) who are technically non-operable for pulmonary endarterectomy. BPA based on objective quantitative methods has not been established. The endpoint at BPA sessions has not been clarified yet.
Objectives
The purpose of this study was to investigate the usefulness of BPA according to peripheral pressure measured by pressure wire or catheter.
Methods
This study included consecutive 143 CTEPH who underwent cardiopulmonary exercise test with right heart catheterization after BPA. All patients were divided into 2 groups such as angio-guided (n=47) group or pressure-guidedgroup (n=96). In pressure-guided group, the pulmonary arterial pressure (PAP) proximal and distal to the target lesion and the ratio of the 2 pressures were measured by the pressure wire or catheter. the endpoint was determined to when the pressure ratio of distal to proximal pressures was >0.7 to 0.8 finally. The dilation was stopped when the distal mean PAP after each dilation reached 35 mm Hg and when the baseline mean PAP was >35 mm Hg. Changes of hemodynamic parameters such as PAP and pulmonary vascular resistance (PVR) from baseline, and mean PAP and PVR at peak oxygen consumption, and pulmonary arterial pressure – cardiac output (PA-CO) slope were compared between two groups. All data except changes of hemodynamics from baseline were expressed by median [25th percentile-75th percentile]. Changes of hemodynamics from baseline were expressed by average [95% confidence interval]
Results
The median age and male were 66 [56–72] years old and 35. There were no significant differences in number of sessions and dilated vessels between two groups (Angio-guided group vs. Pressure-guided group: 4 [3–6] vs. 4 [3–5], P>0.05; 19 [12–22] vs. 17 [13–22], P>0.05). Changes of PAP and PVR from baseline in pressure-guided group was significantly higher than in angio-guided groups (Angio-guided group vs. Pressure-guided group; ΔPAP: −19 [−20 to −17] vs. −20 [−21 to −20], P>0.05; ΔPVR: −6.0 [−6.3 to −5.7] vs. −6.6 [−6.8 to −6.3], P<0.01). Mean PAP and PVR at peak oxygen consumption (VO2) and PA-CO slope in pressure-guided group were significantly lower than in angio-guided group (Angio-guided group vs. Pressure-guided group; PAP at VO2: 43 [36–50] vs. 39 [34–43], P<0.05; PVR at VO2: 2.7 [1.9–4.5] vs. 2.2 [1.6–2.9], P<0.01; PA-CO slope: 3.8 [2.1–5.2] vs. 2.9 [1.9–4.0], P<0.05).
Conclusions
Peripheral-pressure-directed BPA can improve hemodynamics at rest and exercise more effectively.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- Y Nagamatsu
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Inami
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - C Nakata
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Takeuchi
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - H Kikuchi
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - A Goda
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - K Soejima
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Satoh
- Kyorin University School of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
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22
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Higashihara A, Nakagawa K, Inami T, Fukano M, Iizuka S, Maemichi T, Hashizume S, Narita T, Hirose N. Regional differences in hamstring muscle damage after a marathon. PLoS One 2020; 15:e0234401. [PMID: 32584826 PMCID: PMC7316338 DOI: 10.1371/journal.pone.0234401] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 05/24/2020] [Indexed: 02/04/2023] Open
Abstract
Previous studies suggest that marathon running induces lower extremity muscle damage. This study aimed to examine inter- and intramuscular differences in hamstring muscle damage after a marathon using transverse relaxation time (T2)–weighted magnetic resonance images (MRI). 20 healthy collegiate marathon runners (15 males) were recruited for this study. T2-MRI was performed before (PRE) and at 1 (D1), 3 (D3), and 8 days (D8) after marathon, and the T2 values of each hamstring muscle at the distal, middle, and proximal sites were calculated. Results indicated that no significant intermuscular differences in T2 changes were observed and that, regardless of muscle, the T2 values of the distal and middle sites increased significantly at D1 and D3 and recovered at D8, although those values of the proximal site remained constant. T2 significantly increased at distal and middle sites of the biceps femoris long head on D1 (p = 0.030 and p = 0.004, respectively) and D3 (p = 0.007 and p = 0.041, respectively), distal biceps femoris short head on D1 (p = 0.036), distal semitendinosus on D1 (p = 0.047) and D3 (p = 0.010), middle semitendinosus on D1 (p = 0.005), and distal and middle sites of the semimembranosus on D1 (p = 0.008 and p = 0.040, respectively) and D3 (p = 0.002 and p = 0.018, respectively). These results suggest that the distal and middle sites of the hamstring muscles are more susceptible to damage induced by running a full marathon. Conditioning that focuses on the distal and middle sites of the hamstring muscles may be more useful in improving recovery strategies after prolonged running.
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Affiliation(s)
- Ayako Higashihara
- Institute of Physical Education, Keio University, Kanagawa, Japan
- * E-mail:
| | - Kento Nakagawa
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Kanagawa, Japan
| | - Mako Fukano
- Shibaura Institute of Technology, Tokyo, Japan
| | - Satoshi Iizuka
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | | | - Satoru Hashizume
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan
| | - Takaya Narita
- Department of Sport Technology, Toin University of Yokohama, Kanagawa, Japan
| | - Norikazu Hirose
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
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23
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Yamaguchi S, Suzuki K, Inami T, Kanda K, Hanye Z, Okada J. Changes in Urinary Titin N-terminal Fragment Concentration after Concentric and Eccentric Exercise. J Sports Sci Med 2020; 19:121-129. [PMID: 32132835 PMCID: PMC7039023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
We aimed to compare the urinary titin N-terminal fragment (UTF) concentration after concentric and eccentric exercise and to clarify the specific response of UTF to exercise-induced muscle damage (EIMD). Nine healthy young men performed 30 concentric elbow flexion exercises with maximum effort, rested for at least eight weeks, and performed eccentric exercises at the same workload using the same arm. Changes in the maximal voluntary isometric contraction (MVIC), muscle soreness (SOR), range of motion (ROM), serum creatine kinase (CK) activity, and UTF concentrations were recorded before and after for six consecutive days after exercise. There was no significant difference in workload during exercise between the two exercise types. However, serum CK activity increased after eccentric exercise (p < 0.05). Additionally, MVIC, SOR, ROM, and UTF concentration were significantly higher after eccentric exercise than after concentric exercise (p < 0.05). Although workload was the same, the UTF concentration greatly increased after eccentric exercise. Based on these results, we suggest that UTF can be a non-invasive and highly specific biomarker of EIMD.
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Affiliation(s)
- Shota Yamaguchi
- Graduate School of Sport Sciences, Waseda University, Saitama, Japan
| | | | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Kanagawa, Japan
| | - Kazue Kanda
- Institute for Nanoscience & Nanotechnology, Waseda University, Shinjuku, Tokyo, Japan
| | - Zhao Hanye
- Graduate School of Sport Sciences, Waseda University, Saitama, Japan
| | - Junichi Okada
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
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24
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Inami T, Nakagawa K, Yonezu T, Fukano M, Higashihara A, Iizuka S, Abe T, Narita T. Tracking of Time-Dependent Changes in Muscle Hardness After a Full Marathon. J Strength Cond Res 2020; 33:3431-3437. [PMID: 29481455 DOI: 10.1519/jsc.0000000000002495] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Inami, T, Nakagawa, K, Yonezu, T, Fukano, M, Higashihara, A, Iizuka, S, Abe, T, and Narita, T. Tracking of time-dependent changes in muscle hardness after a full marathon. J Strength Cond Res 33(12): 3431-3437, 2019-We sought to identify changes in individual muscle hardness after a full marathon and to track time-dependent changes using ultrasound strain elastography (SE). Twenty-one collegiate marathon runners were recruited. Muscle hardness (i.e., strain ratio, SR) was measured using SE for the rectus femoris (RF), vastus lateralis (VL), biceps femoris (BF) long head, tibialis anterior (TA), gastrocnemius medial (GM) head, and soleus (SOL) muscles at the following time points: pre (PRE), immediately post (POST), day-1 (D1), day-3 (D3), and day-8 (D8), after a full marathon. We found that the SR decreased after the full marathon (i.e., the muscle became harder), and that the lowest SR across all measured muscles was observed on D1. Although there was no difference in the magnitude of change in SR between the muscles of the thigh, that of the MG and SOL were significantly larger than that of the TA. Muscle hardness in the vastus lateralis, biceps femoris, and SOL recovered at D8 (i.e., nonsignificant difference from PRE), whereas recovery of rectus femoris and gastrocnemius medial hardness at D8 was not observed. Thus, the degree of change in muscle hardness does not occur uniformly within the lower extremity muscles. In particular, changes in muscle hardness of the TA after a full marathon are small compared with other muscles and time-dependent changes in each muscle vary during recovery. The features of muscle hardness identified in this study will be useful for coaches when mentoring runners on proper forms and for training advisers and therapists who seek to address deficiencies in running.
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Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Japan
| | - Kento Nakagawa
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan.,Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | | | - Mako Fukano
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | | | - Satoshi Iizuka
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - Taira Abe
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - Takaya Narita
- Department of Physical Therapy, Health Science University, Minamitsuru, Japan
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25
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Yamaguchi S, Suzuki K, Kanda K, Inami T, Okada J. Changes in urinary titin N-terminal fragments as a biomarker of exercise-induced muscle damage in the repeated bout effect. J Sci Med Sport 2019; 23:536-540. [PMID: 31928880 DOI: 10.1016/j.jsams.2019.12.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/26/2019] [Accepted: 12/17/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Muscle damage symptoms induced by unaccustomed eccentric contraction exercise can be reduced by repeating the experience several times. This phenomenon is termed the repeated bout effect. Although traditional biochemical markers require invasive blood sampling, biochemical measurements have recently been developed that can be non-invasively performed using urinary titin N-terminal fragment (UTF). However, it is unclear whether UTF can reflect the repeated bout effect. Therefore, the aim of the present study was to clarify whether UTF decreased with the repeated bout effect. DESIGN This study compared changes in muscle damage markers between bouts of exercise performed for the first and second time. METHODS Eight young men performed 30 eccentric exercises of the elbow flexor on the first day of the first week (Bout 1). A second bout of eccentric exercises, same as the first, was performed 2 weeks later, (Bout 2). The dependent variables were muscle soreness (SOR), maximal voluntary isometric contraction (MVIC), range of motion (ROM), creatine kinase (CK), and UTF. All dependent variables were analyzed using two-way analysis of variance. RESULTS No significant difference was observed in workload or peak torque between the first and second exercise bouts. SOR as well as CK and UTF were significantly lower and ROM and MVIC were significantly higher in Bout 2 in comparison to Bout 1. CONCLUSIONS These results suggest that UTF sensitively reflects the repeated bout effect and exercise-induced muscle damage can be non-invasively measured.
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Affiliation(s)
- Shota Yamaguchi
- Graduate School of Sport Sciences, Waseda University, Japan.
| | | | - Kazue Kanda
- Institute for Nanoscience & Nanotechnology, Waseda University, Shinjuku, Tokyo, JAPAN
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Ikeda N, Inami T, Kawakami Y. Stretching Combined with Repetitive Small Length Changes of the Plantar Flexors Enhances Their Passive Extensibility while Not Compromising Strength. J Sports Sci Med 2019; 18:58-64. [PMID: 30787652 PMCID: PMC6370965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 11/23/2018] [Indexed: 06/09/2023]
Abstract
Static stretching increases flexibility but can decrease muscle strength; therefore, a method that would avoid the latter has been longed for. In this study, a novel stretching modality was developed that provides repetitive small length changes to the plantar flexor muscles undergoing passive static stretching (minute oscillation stretching). We investigated the effects of minute oscillation stretching on muscle strength and flexibility and its continuance. Isometric plantar flexion strength and maximal ankle joint dorsiflexion angle (dorsiflexion range of motion) were measured in 10 healthy young men (22 ± 2 years) before (pre) and immediately after (post) 3 types of stretching: static stretching, minute oscillation stretching at 15 Hz, and no intervention (control). The dorsiflexion range of motion was also measured at 15, 30, and 60 min post-stretching. Elongation of the medial gastrocnemius and Achilles tendon was determined by ultrasonography. Plantar flexion strength significantly decreased by 4.3 ± 3.5% in static stretching but not in minute oscillation stretching. The dorsiflexion range of motion significantly increased both in static stretching (7.2 ± 8.1%) and minute oscillation stretching (11.2 ± 14.6%), which was accompanied by a significantly larger muscle elongation but not tendon elongation. Elevated dorsiflexion range of motion was maintained until 30 min after minute oscillation stretching, while levels returned to baseline (pre-intervention) 15 min after static stretching. All variables remained unchanged in the control condition. In conclusion, minute oscillation stretching improves extensibility of the muscle belly without decreasing strength. Furthermore, the augmented flexibility to a similar extent to static stretching is retained for 30 min in minute oscillation stretching and within 15 min in static stretching.
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Affiliation(s)
- Naoki Ikeda
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Yokohama, Kanagawa, Japan
| | - Yasuo Kawakami
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
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27
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Murayama M, Inami T, Shima N, Nosaka K, Uchiyama T, Yoneda T. Optimum displacement of muscle in relation to thickness for biceps brachii hardness measurement using a push-in meter. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aaea52] [Citation(s) in RCA: 2] [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: 11/12/2022]
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28
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Inami T, Nakagawa K, Fukano M, Yonezu T, Higashihara A, Iizuka S, Narita T, Murayama M. Changes in muscle hardness after a full marathon appear different even intramuscularly. J Sports Med Phys Fitness 2018; 59:1094-1095. [PMID: 30317841 DOI: 10.23736/s0022-4707.18.09173-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Takayuki Inami
- Institute of Physical Education, Keio University, Keio, Japan -
| | - Kento Nakagawa
- Toronto Rehabilitation Institute, University Health Network, Toronto, Canada.,Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, Japan.,Faculty of Sport Sciences, Waseda University, Waseda, Japan
| | - Mako Fukano
- College of Engineering, Shibaura Institute of Technology, Tokyo, Japan
| | | | | | - Satoshi Iizuka
- Faculty of Sport Sciences, Waseda University, Waseda, Japan
| | - Takaya Narita
- Department of Physical Therapy, Health Science University, Kyoto, Japan
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29
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Affiliation(s)
- Mako Fukano
- College of Engineering, Shibaura Institute of Technology, Saitama, Japan
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Kanagawa, Japan
| | - Kento Nakagawa
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - Takaya Narita
- Department of Physical Therapy, Health Science University, Yamanashi, Japan
| | - Shigeo Iso
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
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30
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Inami T, Shigeta Y, Kataoka M, Fukushi K, Takeuchi K, Kikuchi H, Yoshino H, Satoh T. P2603Efficacy of ptpa for long-term outcome in chronic thromboembolic pulmonary hypertension. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2603] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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31
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Kikuchi H, Inami T, Kataoka M, Fukushi K, Takeuchi K, Shigeta Y, Yoshino H, Satoh T. P2599Efficacy of pulmonary hypertension-targeted drugs for chronic thromboembolic pulmonary hypertension after percutaneous transluminal pulmonary angioplasty. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2599] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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32
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Inami T, Kataoka M, Fukushi K, Takeuchi K, Kikuchi H, Shigeta Y, Yoshino H, Satoh T. P2608Efficacy of percutaneous transluminal pulmonary angioplasty for chronic pulmonary thromboembolism without pulmonary hypertension. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2608] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Nakagawa K, Inami T, Yonezu T, Kenmotsu Y, Narita T, Kawakami Y, Kanosue K. Unstable rocker shoes promote recovery from marathon-induced muscle damage in novice runners. Scand J Med Sci Sports 2017; 28:621-629. [PMID: 28513880 DOI: 10.1111/sms.12911] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2017] [Indexed: 11/28/2022]
Abstract
We recently reported that wearing unstable rocker shoes (Masai Barefoot Technology: MBT) may enhance recovery from marathon race-induced fatigue. However, this earlier study only utilized a questionnaire. In this study, we evaluated MBT utilizing objective physiological measures of recovery from marathon-induced muscle damages. Twenty-five university student novice runners were divided into two groups. After running a full marathon, one group wore MBT shoes (MBT group), and the control group (CON) wore ordinary shoes daily for 1 week following the race. We measured maximal isometric joint torque, muscle hardness (real time tissue elastography of the strain ratio) in the lower limb muscles before, immediately after, and 1, 3, and 8 days following the marathon. We calculated the magnitude of recovery by observing the difference in each value between the first measurement and the latter measurements. Results showed that isometric torques in knee flexion recovered at the first day after the race in the MBT group while it did not recover even at the eighth day in the CON group. Muscle hardness in the gastrocnemius and vastus lateralis showed enhanced recovery in the MBT group in comparison with the CON group. Also for muscle hardness in the tibialis anterior and biceps femoris, the timing of recovery was delayed in the CON group. In conclusion, wearing MBT shoes enhanced recovery in lower leg and thigh muscles from muscle damage induced by marathon running.
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Affiliation(s)
- K Nakagawa
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan.,Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
| | - T Inami
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - T Yonezu
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - Y Kenmotsu
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - T Narita
- Health Science University, Kawaguchiko, Japan
| | - Y Kawakami
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - K Kanosue
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
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Mineta S, Inami T, Mariano R, Hirose N. High lateral plantar pressure is related to an increased tibialis anterior/fibularis longus activity ratio in patients with recurrent lateral ankle sprain. Open Access J Sports Med 2017; 8:123-131. [PMID: 28615977 PMCID: PMC5460647 DOI: 10.2147/oajsm.s131596] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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] [Indexed: 12/26/2022] Open
Abstract
Introduction Center of pressure (COP) is a sudden displacement at the time of a lateral ankle sprain (LAS). It has been suggested that the distribution of plantar pressure and the quantity of COP displacement are important for assessing the risk of LAS. Therefore, we evaluated the plantar pressure during a single-leg balance test with eyes closed (SLB-C) to identify the factors and characteristics of plantar pressure in people with repeated cases of LAS. Methods We recruited 22 collegiate athletes and divided them into an instability group (IG; n=11) and a control group (CG; n=11). We measured the distribution of plantar pressure and lower extremity muscle activity during a SLB-C along with static alignment and isometric ankle strength. Results The fibularis longus (FL) activity was significantly lower in the IG than in the CG. The lateral plantar pressure (LPP)/medial plantar pressure (MPP) ratio was also higher in the IG than in the CG. In addition, the LPP/MPP ratio was correlated with the tibialis anterior (TA)/FL ratio. Conclusion These results suggest that increased lateral plantar pressure is related to decreased FL activity and increased TA/FL ratio.
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Affiliation(s)
| | - Takayuki Inami
- Institute of Physical Education, Keio University, Hiyoshi, Yokohama
| | - Raldy Mariano
- Graduate School of Asia-Pacific Studies, Waseda University, Shinjuku, Tokyo
| | - Norikazu Hirose
- Faculty of Sport Sciences, Waseda University, Higashifushimi, Nishitokyo, Japan
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35
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Inami T, Tsujimura T, Shimizu T, Watanabe T, Lau WY, Nosaka K. Relationship between isometric contraction intensity and muscle hardness assessed by ultrasound strain elastography. Eur J Appl Physiol 2017; 117:843-852. [DOI: 10.1007/s00421-016-3528-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 12/08/2016] [Indexed: 01/16/2023]
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36
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Inami T, Shimizu T. The change in muscle hardness after static stretching evaluated by different ultrasound elastography techniques may be equivalent. J Sports Med Phys Fitness 2017; 57:161-162. [DOI: 10.23736/s0022-4707.16.05815-1] [Citation(s) in RCA: 2] [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: 11/08/2022]
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Saito A, Ema R, Inami T, Maeo S, Otsuka S, Higuchi M, Shibata S, Kawakami Y. Anatomical cross-sectional area of the quadriceps femoris and sit-to-stand test score in middle-aged and elderly population: development of a predictive equation. J Physiol Anthropol 2016; 36:3. [PMID: 27405228 PMCID: PMC4940975 DOI: 10.1186/s40101-016-0099-1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 06/09/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Although the sit-to-stand (STS) test score has been shown to relate to the strength and size of the quadriceps femoris (QF) for elderly population, it is unknown whether this relationship is influenced by a posture (i.e., the trunk being allowed to stoop or not) during the STS test. The present study investigated the relationship between STS test score and QF anatomical cross-sectional area (ACSA) in the middle-aged and elderly population with regard to the difference in the posture during STS test, and aimed to develop an accurate predicting equation of the QF ACSA from the STS test score. METHODS 105 males (40-81 years) and 113 females (41-79 years) participated in the present study, then the subjects were divided at random as validation and cross-validation groups. Mid-thigh QF ACSA was determined by magnetic resonance imaging. Subjects performed a 10-repeated STS as fast as possible in two conditions: (1) with the trunk being allowed to stoop during the sitting phases, and (2) kept upright throughout the test. A power index of the STS test score was calculated based on an equation obtained in a previous study using the time taken for each test condition, the thigh and shank lengths, and body mass. In the validation group (n = 109), a stepwise multiple linear regression analysis was performed to create a predictive model of the ACSA with sex, age, the STS time, and power for both conditions as independent variables. The formulated predictive equation was examined in the cross-validation group (n = 109). RESULTS In the validation group, a stepwise regression analysis revealed that STS power with upright trunk condition, sex, and age but not with the stooping condition, were selected as variables to predict QF ACSA (R (2) = 0.64, P < 0.001). There was no systematic error for the relationship between predicted and measured values in the cross-validation group. CONCLUSIONS These results indicate that STS test score with upright trunk condition is one of the indices of QF muscle size of the middle-aged and elderly population. The estimated predicting equation should be useful in clinical and practical settings for the health promotion.
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Affiliation(s)
- Akira Saito
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan.
| | - Ryoichi Ema
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan.,Graduate School of Engineering and Science, Shibaura Institute of Technology, 307 Fukasaku, Minuma-ku, Saitama, Japan.,Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, Japan
| | - Takayuki Inami
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan
| | - Sumiaki Maeo
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan.,Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo, Japan
| | - Shun Otsuka
- Graduate School of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan
| | - Mitsuru Higuchi
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan.,Institute of Advanced Active Aging Research, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan
| | - Shigenobu Shibata
- School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu, Shinjuku-ku, Tokyo, Japan
| | - Yasuo Kawakami
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, Japan
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Nakagaki A, Inami T, Minoura T, Baba R, Iwase S, Sato M. Differences in autonomic neural activity during exercise between the second and third trimesters of pregnancy. J Obstet Gynaecol Res 2016; 42:951-9. [PMID: 27121772 DOI: 10.1111/jog.12990] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 02/01/2016] [Accepted: 02/14/2016] [Indexed: 11/29/2022]
Abstract
AIM To test the hypothesis that autonomic neural activity in pregnant women during exercise varies according to gestational age. METHODS This cross-sectional study involved 20 healthy women in their second (n = 13) or third (n = 7) trimester of pregnancy. Incremental cardiopulmonary exercise testing was performed with an electromagnetic cycle ergometer. Heart rate variability was analyzed by frequency analysis software. RESULTS The low-frequency to high-frequency (LF/HF) ratio, an indicator of the sympathetic nervous system, was significantly higher in third trimester than in second trimester subjects (P < 0.05) at 1, 2, and 3 min of incremental exercise testing. In contrast, the HF/total power ratio, an indicator of rapidly acting parasympathetic activity, was significantly higher in second trimester than in third trimester subjects (P < 0.05) at 2 and 3 min. In addition, a negative correlation was found between gestational age and the 'accumulation half-time' of the LH/HF ratio, the time point at which the sum of the LF/HF ratio reached 50% of that accumulated in the total 6 min of exercise testing (r = -0.49, P = 0.028). CONCLUSIONS The autonomic response to exercise in pregnant women differs between the second and third trimesters. These differences should be considered when prescribing exercise to pregnant women.
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Affiliation(s)
- Akemi Nakagaki
- School of Nursing/Graduate School of Nursing, Nagoya City University, Nagoya, Japan.,Department of Physiology, Aichi Medical University, Nagakute, Japan
| | - Takayuki Inami
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan
| | - Tetsuji Minoura
- School of Nursing & Health, Aichi Prefectural University, Nagoya, Japan
| | - Reizo Baba
- Department of Cardiology, Aichi Children's Health and Medical Centre, Obu, Japan
| | - Satoshi Iwase
- Department of Physiology, Aichi Medical University, Nagakute, Japan
| | - Motohiko Sato
- Department of Physiology, Aichi Medical University, Nagakute, Japan
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Ando R, Nosaka K, Inami T, Tomita A, Watanabe K, Blazevich AJ, Akima H. Difference in fascicle behaviors between superficial and deep quadriceps muscles during isometric contractions. Muscle Nerve 2016; 53:797-802. [DOI: 10.1002/mus.24905] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Ryosuke Ando
- Graduate School of Education and Human Development, Nagoya University, Furo, Chikusa; Nagoya Aichi 464-8601 Japan
- Centre for Exercise and Sport Science Research, School of Exercise and Health Sciences; Edith Cowan University; Perth Western Australia Australia
| | - Kazunori Nosaka
- Centre for Exercise and Sport Science Research, School of Exercise and Health Sciences; Edith Cowan University; Perth Western Australia Australia
| | - Takayuki Inami
- Centre for Exercise and Sport Science Research, School of Exercise and Health Sciences; Edith Cowan University; Perth Western Australia Australia
| | - Aya Tomita
- Graduate School of Education and Human Development, Nagoya University, Furo, Chikusa; Nagoya Aichi 464-8601 Japan
| | - Kohei Watanabe
- School of International Liberal Studies; Chukyo University; Nagoya Japan
| | - Anthony J. Blazevich
- Centre for Exercise and Sport Science Research, School of Exercise and Health Sciences; Edith Cowan University; Perth Western Australia Australia
| | - Hiroshi Akima
- Graduate School of Education and Human Development, Nagoya University, Furo, Chikusa; Nagoya Aichi 464-8601 Japan
- Research Center of Health, Physical Fitness & Sports; Nagoya University; Nagoya Japan
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Ishikawa N, Kimura T, Takeguchi M, Aizawa T, Inami T. B12-O-23Reduction of hematite by ceramics in TEM. Microscopy (Oxf) 2015. [DOI: 10.1093/jmicro/dfv110] [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: 11/14/2022] Open
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42
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Affiliation(s)
- Takayuki Inami
- Centre of Exercise and Sports Science Research, School of Exercise and Health Sciences, Edith Cowan University, Australia
| | - Reizo Baba
- Department of Pediatric Cardiology, Aichi Children’s Health and Medical Center, Japan
| | - Akemi Nakagaki
- Reproductive Health Nursing/Midwifery, Graduate School of Nursing, Nagoya City University, Japan
| | - Takuya Shimizu
- Graduate School of Health and Sports Sciences, Chukyo University, Japan
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Inami T, Tsurumi M, Seino Y, Shimizu W. Successful treatment of ball-shaped very late thrombus after myocardial infarction. Case Reports 2014; 2014:bcr-2014-204340. [DOI: 10.1136/bcr-2014-204340] [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: 11/03/2022] Open
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44
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Inami T, Shirakabe A, Hata N, Seino Y. Unique case of latent left ventricular obstruction in Takayasu arteritis. Case Reports 2013; 2013:bcr-2013-009886. [DOI: 10.1136/bcr-2013-009886] [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: 11/03/2022] Open
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45
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Inami T, Kataoka M, Shimura N, Yanagisawa R, Ishiguro H, Tamura Y, Kawakami T, Fukuda K, Yoshino H, Satoh T. Influence of balloon pulmonary angioplasty on prognosis in patients with chronic thrombo-embolic pulmonary hypertension. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.765] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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46
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Yanagisawa R, Kataoka M, Inami T, Shimura N, Taguchi H, Ishiguro H, Fukuda K, Yoshino H, Satoh T. Impact of percutaneous transluminal pulmonary angioplasty for the treatment of chronic thromboembolic pulmonary hypertension. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2196] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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47
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Nagaoka M, Goda A, Shimura N, Yanagisawa R, Taguchi H, Inami T, Ishiguro H, Satoh T, Yoshino H. Sleep apnea syndrome is not associated with a poor prognosis in patients with pulmonary arterial hypertension. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1531] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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48
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Inami T, Seino Y, Bessho R, Mizuno K. Untreated obstructive sleep apnoea as a therapeutic target in acute aortic dissection. Case Reports 2012; 2012:bcr-2012-006843. [DOI: 10.1136/bcr-2012-006843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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49
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Matsuda YH, Her JL, Inami T, Ohwada K, Ouyang ZW, Okada K, Nojiri H, Mitsuda A, Wada H, Yoshimura K, Amitsuka H, Kawamura N, Suzuki M, Kotani A. XMCD spectroscopy on valence fluctuating and heavy fermion compounds in very high magnetic fields up to 40 T. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/190/1/012019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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Matsuda YH, Ouyang ZW, Nojiri H, Inami T, Ohwada K, Suzuki M, Kawamura N, Mitsuda A, Wada H. X-ray magnetic circular dichroism of a valence fluctuating state in eu at high magnetic fields. Phys Rev Lett 2009; 103:046402. [PMID: 19659375 DOI: 10.1103/physrevlett.103.046402] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Indexed: 05/28/2023]
Abstract
X-ray magnetic circular dichroism (XMCD) at the Eu L edge in two compounds exhibiting valence fluctuation, namely EuNi_{2}(Si_{0.18}Ge_{0.82})_{2} and EuNi_{2}P_{2}, has been investigated at high magnetic fields of up to 40 T. A distinct XMCD peak corresponding to the trivalent state (Eu(3+)), whose ground state is nonmagnetic (J = 0), was observed in addition to the main XMCD peak corresponding to the magnetic (J = 7/2) divalent state (Eu(2+)). This result indicates that the 5d electrons belonging to both valence states are magnetically polarized. It was also found that the ratio P_{5d}(3+)/P_{5d}(2+) between the polarization of 5d electrons (P_{5d}) in the Eu(3+) state and that of Eu(2+) depends on the material. The possible origin of the XMCD and an explanation of the material dependence of P_{5d}(3+)/P_{5d}(2+) are discussed in terms of hybridization between the conduction electrons and the f electrons.
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Affiliation(s)
- Y H Matsuda
- Institute for Materials Research, Tohoku University, Aoba-ku, Sendai 980-8577, Japan.
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