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Berry TR, Rhodes RE, Ori EM, McFadden K, Faulkner G, Latimer-Cheung AE, O'Reilly N, Spence JC, Tremblay MS, Vanderloo LM. The short-term effects of a mass reach physical activity campaign: an evaluation using hierarchy of effects model and intention profiles. BMC Public Health 2018; 18:1300. [PMID: 30482163 PMCID: PMC6258458 DOI: 10.1186/s12889-018-6218-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 11/14/2018] [Indexed: 12/05/2022] Open
Abstract
Background Mass reach physical activity campaigns are designed to deliver physical-activity related messages to a large population across different media including print, television, radio, and websites. Few evaluations have examined the short-term effects of a mass reach campaign on participants who were engaged with the campaign. The current research examined the short-term effects of the ParticipACTION 150 Play List, a mass reach physical activity campaign, on participants who registered with the campaign website. Methods Participants (N = 7801) completed a registration questionnaire measuring demographic information, awareness and recall of physical activity and sport advertising, and self-reported number of activities tried or planned to try from the 150 Play List. A follow-up survey was completed by 1298 participants from the original sample. Additional questions assessed experience with the 150 Play List and attitudes towards campaign advertisements. Results Approximately 14.5% of participants cited the ParticipACTION 150 Play List and 23.6% mentioned a ‘getting active’ message when recalling advertisements. Those who named the 150 Play List or getting active reported more activities tried and more activities planned than those who did not. They were also more likely to say they had tried a new activity and planned ongoing participation. It was also found that participants with a disability were more likely to have tried a new activity compared to those not in a minority group. Other correlates of trying new activities at follow-up were younger age, more positive reported experience with the 150 Play List, and more favourable attitudes towards campaign advertisements. Those who did not intend continued participation, or who were unsure at baseline and then decided against continued participation at follow-up, reported they were less sedentary or encouraging others to be active. Conclusions This research addresses the gap in evidence regarding the efficacy of mass reach physical activity campaigns by informing whether a year-long campaign like the 150 Play List can be effective in influencing the behavior of those engaged with the campaign. The results reinforce the idea that ‘top of mind’ awareness should be measured. Investigating intention profiles can help inform campaign impacts and continuation intentions. Electronic supplementary material The online version of this article (10.1186/s12889-018-6218-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- T R Berry
- Faculty of Kinesiology, Sport, and Recreation, 1-153 University Hall; University of Alberta, T6G 2H9, Edmonton, AB, 780 492 3280, Canada.
| | - R E Rhodes
- University of Victoria, Victoria, Canada
| | - E M Ori
- Faculty of Kinesiology, Sport, and Recreation, 1-153 University Hall; University of Alberta, T6G 2H9, Edmonton, AB, 780 492 3280, Canada
| | - K McFadden
- Faculty of Kinesiology, Sport, and Recreation, 1-153 University Hall; University of Alberta, T6G 2H9, Edmonton, AB, 780 492 3280, Canada
| | - G Faulkner
- University of British Columbia, British Columbia, Canada
| | | | | | - J C Spence
- Faculty of Kinesiology, Sport, and Recreation, 1-153 University Hall; University of Alberta, T6G 2H9, Edmonton, AB, 780 492 3280, Canada
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ontario, Canada
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Chaput JP, Barnes JD, Tremblay MS, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Katzmarzyk PT. Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. Pediatr Obes 2018; 13:450-457. [PMID: 29573239 DOI: 10.1111/ijpo.12276] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/27/2018] [Indexed: 12/27/2022]
Abstract
BACKGROUND It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children. OBJECTIVE The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries. METHODS This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data. RESULTS Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1 in boys and from 41.7 to 58.7 min d-1 in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1 in boys and from 32.5 to 62.7 min d-1 in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85%, similar to MVPA alone. Country-specific analyses provided similar findings. CONCLUSIONS The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.
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Affiliation(s)
- J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.,University of Ottawa, Ottawa, Canada
| | - J D Barnes
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada.,University of Ottawa, Ottawa, Canada
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E V Lambert
- University of Cape Town, Cape Town, South Africa
| | - C Maher
- University of South Australia, Adelaide, Australia
| | - J Maia
- University of Porto, Porto, Portugal
| | - T Olds
- University of South Australia, Adelaide, Australia
| | | | | | | | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA.,University of Massachusetts Amherst, Amherst, MA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
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3
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Chaput J, Barnes JD, Tremblay MS, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor‐Locke C, Katzmarzyk PT. Inequality in physical activity, sedentary behaviour, sleep duration and risk of obesity in children: a 12-country study. Obes Sci Pract 2018; 4:229-237. [PMID: 29951213 PMCID: PMC6009998 DOI: 10.1002/osp4.271] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/28/2018] [Accepted: 04/04/2018] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE Studies examining associations between movement behaviours (i.e. physical activity, sedentary behaviour and sleep duration) and obesity focus on average values of these movement behaviours, despite important within-country and between-country variability. A better understanding of movement behaviour inequalities is important for developing public health policies and behaviour-change interventions. The objective of this ecologic analysis at the country level was to determine if inequality in movement behaviours is a better correlate of obesity than average movement behaviour volume in children from all inhabited continents of the world. METHODS This multinational, cross-sectional study included 6,128 children 9-11 years of age. Moderate-to-vigorous physical activity (MVPA), total sedentary time (SED) and sleep period time were monitored over 7 consecutive days using waist-worn accelerometry. Screen time was self-reported. Inequality in movement behaviours was determined using Gini coefficients (ranging from 0 [complete equality] to 1 [complete inequality]). RESULTS The largest inequality in movement behaviours was observed for screen time (Gini of 0.32; medium inequality), followed by MVPA (Gini of 0.21; low inequality), SED (Gini of 0.07; low inequality) and sleep period time (Gini of 0.05; low inequality). Average MVPA (h d-1) was a better correlate of obesity than MVPA inequality (r = -0.77 vs. r = 0.00, p = 0.03). Average SED (h d-1) was also a better correlate of obesity than SED inequality (r = 0.52 vs. r = -0.32, p = 0.05). Differences in associations for screen time and sleep period time were not statistically significant. MVPA in girls was found to be disproportionally lower in countries with more MVPA inequality. CONCLUSIONS Findings from this study show that average MVPA and SED should continue to be used in population health studies of children as they are better correlates of obesity than inequality in these behaviours. Moreover, the findings suggest that MVPA inequality could be greatly reduced through increases in girls' MVPA alone.
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Affiliation(s)
- J.‐P. Chaput
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
- University of OttawaOttawaCanada
| | - J. D. Barnes
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
| | - M. S. Tremblay
- Children's Hospital of Eastern Ontario Research InstituteOttawaCanada
- University of OttawaOttawaCanada
| | | | - G. Hu
- Pennington Biomedical Research CenterBaton RougeLouisianaUSA
| | | | - C. Maher
- University of South AustraliaAdelaideAustralia
| | - J. Maia
- University of PortoPortoPortugal
| | - T. Olds
- University of South AustraliaAdelaideAustralia
| | | | | | | | - C. Tudor‐Locke
- Pennington Biomedical Research CenterBaton RougeLouisianaUSA
- University of Massachusetts AmherstAmherstMassachusettsUSA
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4
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Dumuid D, Olds T, Lewis LK, Martin-Fernández JA, Barreira T, Broyles S, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maia J, Matsudo V, Onywera VO, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Katzmarzyk P, Gillison F, Maher C. The adiposity of children is associated with their lifestyle behaviours: a cluster analysis of school-aged children from 12 nations. Pediatr Obes 2018; 13:111-119. [PMID: 28027427 DOI: 10.1111/ijpo.12196] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/09/2016] [Accepted: 09/30/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND The relationship between children's adiposity and lifestyle behaviour patterns is an area of growing interest. OBJECTIVES The objectives of this study are to identify clusters of children based on lifestyle behaviours and compare children's adiposity among clusters. METHODS Cross-sectional data from the International Study of Childhood Obesity, Lifestyle and the Environment were used. PARTICIPANTS the participants were children (9-11 years) from 12 nations (n = 5710). MEASURES 24-h accelerometry and self-reported diet and screen time were clustering input variables. Objectively measured adiposity indicators were waist-to-height ratio, percent body fat and body mass index z-scores. ANALYSIS sex-stratified analyses were performed on the global sample and repeated on a site-wise basis. Cluster analysis (using isometric log ratios for compositional data) was used to identify common lifestyle behaviour patterns. Site representation and adiposity were compared across clusters using linear models. RESULTS Four clusters emerged: (1) Junk Food Screenies, (2) Actives, (3) Sitters and (4) All-Rounders. Countries were represented differently among clusters. Chinese children were over-represented in Sitters and Colombian children in Actives. Adiposity varied across clusters, being highest in Sitters and lowest in Actives. CONCLUSIONS Children from different sites clustered into groups of similar lifestyle behaviours. Cluster membership was linked with differing adiposity. Findings support the implementation of activity interventions in all countries, targeting both physical activity and sedentary time.
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Affiliation(s)
- Dorothea Dumuid
- School of Health Sciences, University of South Australia, Adelaide, Australia
| | - T Olds
- School of Health Sciences, University of South Australia, Adelaide, Australia
| | - L K Lewis
- School of Health Sciences, University of South Australia, Adelaide, Australia.,School of Health Sciences, Flinders University, Adelaide, Australia
| | | | - T Barreira
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA.,School of Education, Syracuse University, Syracuse, USA
| | - S Broyles
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - G Hu
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - R Kuriyan
- Department of Nutrition, St John's Research Institute, Bengaluru, India
| | - A Kurpad
- Department of Nutrition, St John's Research Institute, Bengaluru, India
| | - E V Lambert
- Department of Human Biology, University of Cape Town, Cape Town, South Africa
| | - J Maia
- Faculty of Sport, University of Porto, Porto, Portugal
| | - V Matsudo
- Center of Studies of the Physical Fitness Research Laboratory from Sao Caetano du Sul (CELAFISCS), Sao Caetano do Sul, Brazil
| | - V O Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Kenyatta, Kenya
| | - O L Sarmiento
- Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - P Katzmarzyk
- Population Science, Pennington Biomedical Research Center, Baton Rouge, USA
| | - F Gillison
- Department for Health, University of Bath, Bath, UK
| | - C Maher
- School of Health Sciences, University of South Australia, Adelaide, Australia
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5
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Chaput JP, Katzmarzyk PT, Barnes JD, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Tremblay MS. Mid-upper arm circumference as a screening tool for identifying children with obesity: a 12-country study. Pediatr Obes 2017; 12:439-445. [PMID: 27238202 DOI: 10.1111/ijpo.12162] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/21/2016] [Accepted: 05/09/2016] [Indexed: 12/17/2022]
Abstract
BACKGROUND No studies have examined if mid-upper arm circumference (MUAC) can be an alternative screening tool for obesity in an international sample of children differing widely in levels of human development. OBJECTIVE Our aim is to determine whether MUAC could be used to identify obesity in children from 12 countries in five major geographic regions of the world. METHODS This observational, multinational cross-sectional study included 7337 children aged 9-11 years. Anthropometric measurements were objectively assessed, and obesity was defined according to the World Health Organization reference data. RESULTS In the total sample, MUAC was strongly correlated with adiposity indicators in both boys and girls (r > 0.86, p < 0.001). The accuracy level of MUAC for identifying obesity was high in both sexes and across study sites (overall area under the curve of 0.97, sensitivity of 95% and specificity of 90%). The MUAC cut-off value to identify obesity was ~25 cm for both boys and girls. In country-specific analyses, the cut-off value to identify obesity ranged from 23.2 cm (boys in South Africa) to 26.2 cm (girls in the UK). CONCLUSIONS Results from this 12-country study suggest that MUAC is a simple and accurate measurement that may be used to identify obesity in children aged 9-11 years. MUAC may be a promising screening tool for obesity in resource-limited settings.
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Affiliation(s)
- J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | | | - J D Barnes
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, USA
| | - R Kuriyan
- St. Johns Research Institute, Bangalore, India
| | - A Kurpad
- St. Johns Research Institute, Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Canada
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Katzmarzyk PT, Broyles ST, Chaput JP, Fogelholm M, Hu G, Lambert EV, Maher C, Maia J, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C. Sources of variability in childhood obesity indicators and related behaviors. Int J Obes (Lond) 2017; 42:108-110. [PMID: 28811652 PMCID: PMC5762390 DOI: 10.1038/ijo.2017.204] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/04/2017] [Indexed: 01/08/2023]
Abstract
The purpose of this study was to describe sources of variability in obesity-related variables in 6,022 children aged 9–11 y from 12 countries. The study design involved recruitment of students, nested within schools, which were nested within study sites. Height, weight and waist circumference (WC) were measured and BMI was calculated; sleep duration and total and in-school moderate-to-vigorous physical activity (MVPA) and sedentary time were measured by accelerometry; and diet scores were obtained by questionnaire. Variance in most variables was largely explained at the student level: BMI (91.9%), WC (93.5%), sleep (75.3%), MVPA (72.5%), sedentary time (76.9%), healthy diet score (88.3%), unhealthy diet score (66.2%), with the exception of in-school MVPA (53.8%) and in-school sedentary time (25.1%). Variance explained at the school level ranged from 3.3% for BMI to 29.8% for in-school MVPA, and variance explained at the site level ranged from 3.2% for WC to 54.2% for in-school sedentary time. In general, more variance was explained at the school and site levels for behaviors than for anthropometric traits. Given the variance in obesity-related behaviors in primary school children explained at school and site levels, interventions that target policy and environmental changes may enhance obesity intervention efforts.
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Affiliation(s)
- P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- School of Health Sciences/Sansom Institute, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - T Olds
- School of Health Sciences/Sansom Institute, University of South Australia, Adelaide, South Australia, Australia
| | | | | | | | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
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7
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Sampasa-Kanyinga H, Standage M, Tremblay MS, Katzmarzyk PT, Hu G, Kuriyan R, Maher C, Maia J, Olds T, Sarmiento OL, Tudor-Locke C, Chaput JP. Associations between meeting combinations of 24-h movement guidelines and health-related quality of life in children from 12 countries. Public Health 2017; 153:16-24. [PMID: 28818582 DOI: 10.1016/j.puhe.2017.07.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 05/09/2017] [Accepted: 07/07/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To examine whether meeting vs not meeting movement/non-movement guidelines (moderate-to-vigorous physical activity [MVPA], screen time, sleep duration), and combinations of these recommendations, are associated with health-related quality of life (HRQoL) in children from 12 countries in five major geographic regions of the world and explore whether the associations vary by study site. STUDY DESIGN Observational, multinational cross-sectional study. METHODS This study included 6106 children aged 9-11 years from sites in Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, the United Kingdom, and the United States. Participants completed the KIDSCREEN-10 to provide a global measure of their HRQoL. Sleep duration and MVPA were assessed using 24-h accelerometry. Screen time was assessed through self-report. Meeting the recommendations was defined as ≥60 min/day for MVPA, ≤2 h/day for screen time, and between 9 and 11 h/night for sleep duration. Age, sex, highest parental education, unhealthy diet pattern score, and body mass index z-score were included as covariates in statistical models. RESULTS In the full sample, children meeting the screen time recommendation, the screen time + sleep recommendation, and all three recommendations had significantly better HRQoL than children not meeting any of these guidelines. Differences in HRQoL scores between sites were also found within combinations of movement/non-movement behaviors. For example, while children in Australia, Canada, and USA self-reported better HRQoL when meeting all three recommendations, children in Kenya and Portugal reported significantly lower HRQoL when meeting all three recommendations (relative to not meeting any). CONCLUSIONS Self-reported HRQoL is generally higher when children meet established movement/non-movement recommendations. However, differences between study sites also suggest that interventions aimed at improving lifestyle behaviors and HRQoL should be locally and culturally adapted.
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Affiliation(s)
- H Sampasa-Kanyinga
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, Canada
| | - M Standage
- Department for Health, University of Bath, Bath, United Kingdom
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- Department of Nutrition, St. John's Research Institute, Bangalore, India
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, Australia
| | - O L Sarmiento
- School of Medicine, Universidad de Los Andes, Bogotá, Colombia
| | - C Tudor-Locke
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
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8
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Prince SA, Reed JL, McFetridge C, Tremblay MS, Reid RD. Correlates of sedentary behaviour in adults: a systematic review. Obes Rev 2017; 18:915-935. [PMID: 28524615 DOI: 10.1111/obr.12529] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/03/2017] [Accepted: 02/07/2017] [Indexed: 12/26/2022]
Abstract
OBJECTIVE The objective of this study was to systematically review evidence to identify intrapersonal, social environmental, physical environmental and policy correlates of sedentary behaviour (SB) among adults. METHODS Six databases were searched to identify studies that reported on intrapersonal, social, physical environmental and/or policy correlates of SB across domains (i.e. occupational, leisure and transportation) in adults (mean ≥ 18 years old). Subgroup differences (sex, age, disease status, publication status and date, weekdays vs. weekend) were examined. Risk of bias was assessed, and a qualitative synthesis completed. PROSPERO CRD42014009814 RESULTS: Searching identified 22,779 articles; 257 were used in the analysis. Most studies used self-reported SB and were cross-sectional. The most studied domain of SB and correlate was leisure and intrapersonal, respectively. Consistent evidence found positive relationships between full-time employment and higher transportation and lower leisure SB; higher income/socioeconomic status and greater transportation and occupation SB; living in more urban areas and greater sitting time and total SB; ownership of televisions and greater leisure SB; and, active workstations and lower occupational SB. CONCLUSIONS The review identifies the need for longitudinal studies, as well as further research on factors in the physical, social and policy environments. The review also recognizes the need to standardize methodology for collecting, defining and reporting SB and correlates.
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Affiliation(s)
- S A Prince
- Division of Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - J L Reed
- Division of Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, ON, Canada
| | - C McFetridge
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - M S Tremblay
- Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada.,Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
| | - R D Reid
- Division of Prevention and Rehabilitation, University of Ottawa Heart Institute, Ottawa, ON, Canada
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9
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Borghese MM, Tremblay MS, LeBlanc AG, Leduc G, Boyer C, Chaput JP. Comparison of ActiGraph GT3X+ and Actical accelerometer data in 9-11-year-old Canadian children. J Sports Sci 2016; 35:517-524. [PMID: 27103499 DOI: 10.1080/02640414.2016.1175653] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Accelerometry is the gold standard for field-based physical activity assessment in children; however, the plethora of devices, data reduction procedures, and cut-points available limits comparability between studies. This study aimed to compare physical activity variables from the ActiGraph GT3X+ and Actical accelerometers in children under free-living conditions. A cross-sectional study of 379 children aged 9-11 years from Ottawa (Canada) was conducted. Children wore the ActiGraph GT3X+ and Actical accelerometers on the hip simultaneously for 7 consecutive days (24-h protocol). Moderate-to-vigorous (MVPA), vigorous (VPA), moderate (MPA), and light (LPA) physical activity, as well as sedentary time, (SED) were derived using established data reduction protocols. Excellent agreement between devices was observed for MVPA (ICC = 0.73-0.80), with fair to good agreement for MPA, LPA and SED, and poor agreement for VPA. Bland-Altman plots showed excellent agreement for MVPA, LPA, and SED, adequate agreement for MPA, and poor agreement for VPA. MVPA derived from the Actical was 11.7% lower than the ActiGraph GT3X+. The ActiGraph GT3X+ and Actical are comparable for measuring children's MVPA. However, comparison between devices for VPA, MPA, LPA, and SED are highly dependent on data reduction procedures and cut-points, and should be interpreted with caution.
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Affiliation(s)
- M M Borghese
- a School of Kinesiology and Health Studies , Queen's University , Kingston , ON , Canada
| | - M S Tremblay
- b Healthy Active Living and Obesity Research Group , Children's Hospital of Eastern Ontario Research Institute , Ottawa , ON , Canada.,c School of Human Kinetics, Faculty of Health Sciences , University of Ottawa , Ottawa , ON , Canada.,d Department of Pediatrics, Faculty of Medicine , University of Ottawa , Ottawa , ON , Canada
| | - A G LeBlanc
- b Healthy Active Living and Obesity Research Group , Children's Hospital of Eastern Ontario Research Institute , Ottawa , ON , Canada
| | - G Leduc
- b Healthy Active Living and Obesity Research Group , Children's Hospital of Eastern Ontario Research Institute , Ottawa , ON , Canada
| | - C Boyer
- b Healthy Active Living and Obesity Research Group , Children's Hospital of Eastern Ontario Research Institute , Ottawa , ON , Canada
| | - J P Chaput
- b Healthy Active Living and Obesity Research Group , Children's Hospital of Eastern Ontario Research Institute , Ottawa , ON , Canada.,c School of Human Kinetics, Faculty of Health Sciences , University of Ottawa , Ottawa , ON , Canada.,d Department of Pediatrics, Faculty of Medicine , University of Ottawa , Ottawa , ON , Canada
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10
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Katzmarzyk PT, Barreira TV, Broyles ST, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Church TS. Association between body mass index and body fat in 9-11-year-old children from countries spanning a range of human development. Int J Obes Suppl 2015; 5:S43-6. [PMID: 27152184 DOI: 10.1038/ijosup.2015.18] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The purpose was to assess associations between body mass index (BMI) and body fat in a multinational sample of 9-11-year-old children. The sample included 7265 children from countries ranging in human development. Total body fat (TBF) and percentage body fat (PBF) were measured with a Tanita SC-240 scale and BMI z-scores (BMIz) and percentiles were computed using reference data from the World Health Organization and the U.S. Centers for Disease Control and Prevention, respectively. Mean PBF at BMIz values of -1, 0 and +1 were estimated using multilevel models. Correlations between BMI and TBF were >0.90 in all countries, and correlations between BMI and PBF ranged from 0.76 to 0.96. Boys from India had higher PBF than boys from several other countries at all levels of BMIz. Kenyan girls had lower levels of PBF than girls from several other countries at all levels of BMIz. Boys and girls from Colombia had higher values of PBF at BMIz=-1, whereas Colombian boys at BMIz 0 and +1 also had higher values of PBF than boys in other countries. Our results show a consistently high correlation between BMI and adiposity in children from countries representing a wide range of human development.
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Affiliation(s)
- P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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11
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Chaput JP, Katzmarzyk PT, LeBlanc AG, Tremblay MS, Barreira TV, Broyles ST, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Rae DE, Maher C, Maia J, Matsudo V, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Olds T. Associations between sleep patterns and lifestyle behaviors in children: an international comparison. Int J Obes Suppl 2015; 5:S59-65. [PMID: 27152187 DOI: 10.1038/ijosup.2015.21] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVES Although evidence is accumulating on the importance of a good night's sleep for healthy eating and activity behaviors, existing research has mainly been conducted in high-income, developed countries with limited sociocultural variability. This study is the first to examine the associations between sleep patterns and lifestyle behaviors in children from 12 countries in five major geographic regions of the world. METHODS This observational, multinational cross-sectional study included 5777 children aged 9-11 years from sites in Australia, Brazil, Canada, China, Colombia, Finland, India, Kenya, Portugal, South Africa, the United Kingdom and the United States. Nocturnal sleep duration (hours per night), sleep efficiency (%) and bedtime (h:min) were monitored over 7 consecutive days using an accelerometer. Lifestyle behaviors included moderate-to-vigorous physical activity (MVPA), total sedentary time (SED), self-reported screen time (ST) and healthy/unhealthy diet patterns (HDP/UDP). Multilevel modeling analyses were used to account for the hierarchical nature of the data. RESULTS Overall, participants averaged 8.8 (s.d. 0.9) hours of sleep with 96.2% (s.d. 1.4) sleep efficiency and a mean bedtime of 2218 hours. After adjustment for age, sex, highest parental education and BMI z-score, results showed that (i) sleep duration was negatively associated with MVPA, SED and UDP score; (ii) sleep efficiency was negatively associated with MVPA and UDP score, and positively associated with SED; and (iii) later bedtime was positively associated with SED, ST and UDP score, and negatively associated with MVPA and HDP score. Results using categories of sleep patterns were consistent with the linear associations. Results also revealed that associations between sleep patterns and MVPA, SED and ST were significantly different between study sites, with stronger associations in high-income countries compared with low/middle-income countries. CONCLUSIONS Sleep characteristics are important correlates of lifestyle behaviors in children. Differences between countries suggest that interventions aimed at improving sleep and lifestyle behaviors should be culturally adapted.
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Affiliation(s)
- J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - A G LeBlanc
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; University of Ottawa, Ottawa, Ontario, Canada
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St. Johns Research Institute , Bangalore, India
| | - A Kurpad
- St. Johns Research Institute , Bangalore, India
| | - E V Lambert
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - D E Rae
- Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
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12
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Tudor-Locke C, Mire EF, Barreira TV, Schuna JM, Chaput JP, Fogelholm M, Hu G, Kurpad A, Kuriyan R, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Zhao P, Church TS, Katzmarzyk PT. Nocturnal sleep-related variables from 24-h free-living waist-worn accelerometry: International Study of Childhood Obesity, Lifestyle and the Environment. Int J Obes Suppl 2015; 5:S47-52. [PMID: 27152185 DOI: 10.1038/ijosup.2015.19] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES We describe the process of identifying and defining nocturnal sleep-related variables (for example, movement/non-movement indicators of sleep efficiency, waking episodes, midpoint and so on) using the unique 24-h waist-worn free-living accelerometer data collected in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). METHODS Seven consecutive days of 24-h waist-worn accelerometer (GT3X+, ActiGraph LLC) data were collected from over 500 children at each site. An expert subgroup of the research team with accelerometry expertize, frontline data collectors and data managers met on several occasions to categorize and operationally define nocturnal accelerometer signal data patterns. The iterative process was informed by the raw data drawn from a sub set of the US data, and culminated in a refined and replicable delineated definition for each identified nocturnal sleep-related variable. Ultimately based on 6318 participants from all 12 ISCOLE sites with valid total sleep episode time (TSET), we report average clock times for nocturnal sleep onset, offset and midpoint in addition to sleep period time, TSET and restful sleep efficiency (among other derived variables). RESULTS Nocturnal sleep onset occurred at 2218 hours and nocturnal sleep offset at 0707 hours. The mean midpoint was 0243 hours. The sleep period time of 529.6 min (8.8 h) was typically accumulated in a single episode, making the average TSET very similar in duration (529.0 min). The mean restful sleep efficiency ranged from 86.8% (based on absolute non-movement of 0 counts per minute) to 96.0% (based on relative non-movement of <100 counts per minute). CONCLUSIONS These variables extend the potential of field-based 24-h waist-worn accelerometry to distinguish and categorize the underlying robust patterns of movement/non-movement signals conveying magnitude, duration, frequency and periodicity during the nocturnal sleep period.
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Affiliation(s)
- C Tudor-Locke
- Department of Kinesiology, School of Public Health and Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA; Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E F Mire
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, Syracuse University, Syracuse, NY, USA
| | - J M Schuna
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Oregon State University, Corvallis, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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13
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Zakrzewski JK, Gillison FB, Cumming S, Church TS, Katzmarzyk PT, Broyles ST, Champagne CM, Chaput JP, Denstel KD, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Mire EF, Olds T, Onywera V, Sarmiento OL, Tremblay MS, Tudor-Locke C, Zhao P, Standage M. Associations between breakfast frequency and adiposity indicators in children from 12 countries. Int J Obes Suppl 2015; 5:S80-8. [PMID: 27152190 DOI: 10.1038/ijosup.2015.24] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Reports of inverse associations between breakfast frequency and indices of obesity are predominantly based on samples of children from high-income countries with limited socioeconomic diversity. Using data from the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE), the present study examined associations between breakfast frequency and adiposity in a sample of 9-11-year-old children from 12 countries representing a wide range of geographic and socio-cultural variability. METHODS Multilevel statistical models were used to examine associations between breakfast frequency (independent variable) and adiposity indicators (dependent variables: body mass index (BMI) z-score and body fat percentage (BF%)), adjusting for age, sex, and parental education in 6941 children from 12 ISCOLE study sites. Associations were also adjusted for moderate-to-vigorous physical activity, healthy and unhealthy dietary patterns and sleep time in a sub-sample (n=5710). Where interactions with site were significant, results were stratified by site. RESULTS Adjusted mean BMI z-score and BF% for frequent breakfast consumers were 0.45 and 20.5%, respectively. Frequent breakfast consumption was associated with lower BMI z-scores compared with occasional (P<0.0001, 95% confidence intervals (CI): 0.10-0.29) and rare (P<0.0001, 95% CI: 0.18-0.46) consumption, as well as lower BF% compared with occasional (P<0.0001, 95% CI: 0.86-1.99) and rare (P<0.0001, 95% CI: 1.07-2.76). Associations with BMI z-score varied by site (breakfast by site interaction; P=0.033): associations were non-significant in three sites (Australia, Finland and Kenya), and occasional (not rare) consumption was associated with higher BMI z-scores compared with frequent consumption in three sites (Canada, Portugal and South Africa). Sub-sample analyses adjusting for additional covariates showed similar associations between breakfast and adiposity indicators, but lacked site interactions. CONCLUSIONS In a multinational sample of children, more frequent breakfast consumption was associated with lower BMI z-scores and BF% compared with occasional and rare consumption. Associations were not consistent across all 12 countries. Further research is required to understand global differences in the observed associations.
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Affiliation(s)
- J K Zakrzewski
- Department of Sport Science and Physical Activity, University of Bedfordshire , Bedford, UK
| | - F B Gillison
- Department for Health, University of Bath , Bath, UK
| | - S Cumming
- Department for Health, University of Bath , Bath, UK
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - C M Champagne
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , Sao Paulo, Brazil
| | - E F Mire
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - T Olds
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine Universidad de los Andes , Bogota, Colombia
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - M Standage
- Department for Health, University of Bath , Bath, UK
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14
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Denstel KD, Broyles ST, Larouche R, Sarmiento OL, Barreira TV, Chaput JP, Church TS, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Katzmarzyk PT. Active school transport and weekday physical activity in 9-11-year-old children from 12 countries. Int J Obes Suppl 2015; 5:S100-6. [PMID: 27152177 DOI: 10.1038/ijosup.2015.26] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Active school transport (AST) may increase the time that children spend in physical activity (PA). This study examined relationships between AST and weekday moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), sedentary time (SED) and total activity during naturally organized time periods (daily, before school, during school and after school) in a sample of children from 12 countries. METHODS The sample included 6224 children aged 9-11 years. PA and sedentary time were objectively measured using Actigraph accelerometers. AST was self-reported by participants. Multilevel generalized linear and logistic regression statistical models were used to determine associations between PA, SED and AST across and within study sites. RESULTS After adjustment for age, highest parental educational attainment, BMI z-score and accelerometer wear time, children who engaged in AST accumulated significantly more weekday MVPA during all studied time periods and significantly less time in LPA before school compared with children who used motorized transport to school. AST was unrelated to time spent in sedentary behaviors. Across all study sites, AST was associated with 6.0 min (95% confidence interval (CI): 4.7-7.3; P<0.0001) more of weekday MVPA; however, there was some evidence that this differed across study sites (P for interaction=0.06). Significant positive associations were identified within 7 of 12 study sites, with differences ranging from 4.6 min (95% CI: 0.3-8.9; P=0.04, in Canada) to 10.2 min (95% CI: 5.9-14.4; P<0.0001, in Brazil) more of daily MVPA among children who engaged in AST compared with motorized transport. CONCLUSIONS The present study demonstrated that AST was associated with children spending more time engaged in MVPA throughout the day and less time in LPA before school. AST represents a good behavioral target to increase levels of PA in children.
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Affiliation(s)
- K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Larouche
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute , Bangalore, India
| | - A Kurpad
- St Johns Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS) , São Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - M Standage
- Department for Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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15
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Sarmiento OL, Lemoine P, Gonzalez SA, Broyles ST, Denstel KD, Larouche R, Onywera V, Barreira TV, Chaput JP, Fogelholm M, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Standage M, Tremblay MS, Tudor-Locke C, Zhao P, Church TS, Katzmarzyk PT. Relationships between active school transport and adiposity indicators in school-age children from low-, middle- and high-income countries. Int J Obes Supp 2015; 5:S107-14. [PMID: 27152178 DOI: 10.1038/ijosup.2015.27] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVES Within the global context of the nutrition and physical activity transition it is important to determine the relationship between adiposity and active school transport (AST) across different environmental and socio-cultural settings. The present study assessed the association between adiposity (that is, body mass index z-score (BMIz), obesity, percentage body fat (PBF), waist circumference) and AST in 12 country sites, in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). METHODS The analytical sample included 6797 children aged 9-11 years. Adiposity indicators included, BMIz calculated using reference data from the World Health Organization, obesity (BMIz ⩾+2 s.d.), PBF measured using bioelectrical impedance and waist circumference. School travel mode was assessed by questionnaire and categorized as active travel versus motorized travel. Multilevel linear and non-linear models were used to estimate the magnitude of the associations between adiposity indicators and AST by country site and sex. RESULTS After adjusting for age, sex, parental education and motorized vehicle availability, children who reported AST were less likely to be obese (odds ratio=0.72, 95% confidence interval (0.60-0.87), P<0.001) and had a lower BMIz (-0.09, s.e.m.=0.04, P=0.013), PBF (least square means (LSM) 20.57 versus 21.23% difference -0.66, s.e.m.=0.22, P=0.002) and waist circumference (LSM 63.73 cm versus 64.63 cm difference -0.90, s.e.m.=0.26, P=0.001) compared with those who reported motorized travel. Overall, associations between obesity and AST did not differ by country (P=0.279) or by sex (P=0.571). CONCLUSIONS AST was associated with lower measures of adiposity in this multinational sample of children. Such findings could inform global efforts to prevent obesity among school-age children.
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Affiliation(s)
- O L Sarmiento
- Department of Public Health, School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - P Lemoine
- Department of Public Health, School of Medicine, Universidad de los Andes, Bogotá, Colombia; Department of Industrial Engineering, Faculty of Engineering, CeiBA Complex Systems Research Center, Universidad de los Andes, Bogotá, Colombia
| | - S A Gonzalez
- Department of Public Health, School of Medicine, Universidad de los Andes , Bogotá, Colombia
| | - S T Broyles
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - K D Denstel
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Larouche
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University , Nairobi, Kenya
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Exercise Science, University of Syracuse, Syracuse, NY, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki , Helsinki, Finland
| | - G Hu
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - R Kuriyan
- St John's Research Institute , Bangalore, India
| | - A Kurpad
- St John's Research Institute , Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town , Cape Town, South Africa
| | - C Maher
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto , Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul , Sao Paulo, Brazil
| | - T Olds
- Alliance for Research In Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia , Adelaide, South Australia, Australia
| | - M Standage
- Department of Health, University of Bath , Bath, UK
| | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute , Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA; Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center , Tianjin, China
| | - T S Church
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
| | - P T Katzmarzyk
- Pennington Biomedical Research Center , Baton Rouge, LA, USA
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Qiao Y, Ma J, Wang Y, Li W, Katzmarzyk PT, Chaput JP, Fogelholm M, Johnson WD, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tremblay MS, Tudor-Locke C, Church TS, Zhao P, Hu G. Birth weight and childhood obesity: a 12-country study. Int J Obes Suppl 2015; 5:S74-9. [PMID: 27152189 PMCID: PMC4850624 DOI: 10.1038/ijosup.2015.23] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Few studies have investigated the association between the full range of birth weight and the risk of childhood obesity in high-, middle- and low-income countries. The aim of the present study is to assess the association between different levels of birth weight and the risk of obesity among children aged 9-11 years in 12 countries. METHODS A multinational, cross-sectional study of 5141 children aged 9-11 years was conducted in 12 countries. Height and weight were obtained using standardized methods. Time spent in moderate-to-vigorous physical activity (MVPA), sedentary and sleeping were objectively measured using 24-h, waist-worn accelerometer (Actigraph GT3X+) monitored for 7 days. Birth weight and other factors (regions, parental education, maternal history of gestational diabetes, children age, gender, breast feeding, gestational age, unhealthy diet scores and healthy diet scores) were collected by parental and children's questionnaires. Multilevel modeling was used to account for the nested nature of the data. RESULTS The overall prevalence of obesity (BMI z-score>+2 s.d.) was 15.4% for boys and 10.0% for girls. There was a positive association between birth weight and BMI z-scores. The multivariable-adjusted odds ratios (ORs) of childhood obesity were significantly higher among children whose birth weights were 3500-3999 g (OR 1.45; 95% confidence interval (CI): 1.10-1.92), and >4000 g (OR 2.08; 95% CI: 1.47-2.93), compared with the reference group (2500-2999 g). The positive association between birth weight and the odds of childhood obesity was seen in girls, whereas a U-shaped association appeared in boys. CONCLUSIONS High levels of birth weight, defined as birth weight ⩾3500 g, were associated with increased odds of obesity among 9-11-year-old children in 12 countries. However, sex differences in the association between birth weight and the risk of obesity need to be considered when planning interventions to reduce childhood obesity.
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Affiliation(s)
- Y Qiao
- Tianjin Women's and Children's Health Center, Tianjin, China
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J Ma
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - Y Wang
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - W Li
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - W D Johnson
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute, Bangalore, India
| | - A Kurpad
- St Johns Research Institute, Bangalore, India
| | - E V Lambert
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | | | - M S Tremblay
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - T S Church
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - P Zhao
- Tianjin Women's and Children's Health Center, Tianjin, China
| | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - for the ISCOLE Research Group
- Tianjin Women's and Children's Health Center, Tianjin, China
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
- St Johns Research Institute, Bangalore, India
- Department of Human Biology, Faculty of Health Sciences, Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
- School of Medicine, Universidad de los Andes, Bogota, Colombia
- University of Bath, Bath, UK
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
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LeBlanc AG, Katzmarzyk PT, Barreira TV, Broyles ST, Chaput JP, Church TS, Fogelholm M, Harrington DM, Hu G, Kuriyan R, Kurpad A, Lambert EV, Maher C, Maia J, Matsudo V, Olds T, Onywera V, Sarmiento OL, Standage M, Tudor-Locke C, Zhao P, Tremblay MS. Are participant characteristics from ISCOLE study sites comparable to the rest of their country? Int J Obes Suppl 2015; 5:S9-S16. [PMID: 27152192 PMCID: PMC4850614 DOI: 10.1038/ijosup.2015.13] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES The International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) provides robust, multi-national information on physical activity, diet and weight status in 9-11-year-old children around the world. The purpose of this analysis was to examine the similarities and differences between participant characteristics from ISCOLE sites and data from nationally representative surveys from ISCOLE countries (Australia, Brazil, Canada, China, Colombia, Finland, Kenya, India, Portugal, South Africa, the United Kingdom and the United States). METHODS Distributions of characteristics were assessed within each ISCOLE country-level database, and compared with published data from national or regional surveys, where available. Variables of comparison were identified a priori and included body mass index (BMI), physical activity (accelerometer-determined steps per day) and screen time (child-report). RESULTS Of 12 countries, data on weight status (BMI) were available in 8 countries, data on measured physical activity (steps per day) were available in 5 countries and data on self-reported screen time were available in 9 countries. The five ISCOLE countries that were part of the Health Behaviour in School-aged Children Survey (that is, Canada, Finland, Portugal, the United Kingdom (England) and the United States) also provided comparable data on self-reported physical activity. Available country-specific data often used different measurement tools or cut-points, making direct comparisons difficult. Where possible, ISCOLE data were re-analyzed to match country-level data, but this step limited between-country comparisons. CONCLUSIONS From the analyses performed, the ISCOLE data do not seem to be systematically biased; however, owing to limitations in data availability, data from ISCOLE should be used with appropriate caution when planning country-level population health interventions. This work highlights the need for harmonized measurement tools around the world while accounting for culturally specific characteristics, and the need for collaboration across study centers and research groups.
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Affiliation(s)
- A G LeBlanc
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
| | - P T Katzmarzyk
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - T V Barreira
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- University of Syracuse, Syracuse, New York, USA
| | - S T Broyles
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
| | - T S Church
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - M Fogelholm
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | | | - G Hu
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - R Kuriyan
- St Johns Research Institute, Bangalore, India
| | - A Kurpad
- St Johns Research Institute, Bangalore, India
| | - E V Lambert
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - C Maher
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - J Maia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
| | - V Matsudo
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
| | - T Olds
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - V Onywera
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
| | - O L Sarmiento
- School of Medicine, Universidad de los Andes, Bogota, Colombia
| | - M Standage
- Department for Health, University of Bath, Bath, UK
| | - C Tudor-Locke
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - P Zhao
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - M S Tremblay
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - for the ISCOLE Research Group
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
- Pennington Biomedical Research Center, Baton Rouge, LA, USA
- University of Syracuse, Syracuse, New York, USA
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
- University of Leicester, Leicester, UK
- St Johns Research Institute, Bangalore, India
- Department of Human Biology, Division of Exercise Science and Sports Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Alliance for Research in Exercise Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia
- CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal
- Centro de Estudos do Laboratório de Aptidão Física de São Caetano do Sul (CELAFISCS), Sao Paulo, Brazil
- Department of Recreation Management and Exercise Science, Kenyatta University, Nairobi, Kenya
- School of Medicine, Universidad de los Andes, Bogota, Colombia
- Department for Health, University of Bath, Bath, UK
- Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA, USA
- Tianjin Women's and Children's Health Center, Tianjin, China
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Affiliation(s)
- A G LeBlanc
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Population Health, Faculty of Graduate and Postdoctoral Studies, University of Ottawa, Ottawa, Canada.
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Chaput JP, Lambert M, Mathieu ME, Tremblay MS, O' Loughlin J, Tremblay A. Physical activity vs. sedentary time: independent associations with adiposity in children. Pediatr Obes 2012; 7:251-8. [PMID: 22461356 DOI: 10.1111/j.2047-6310.2011.00028.x] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [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] [Received: 05/24/2011] [Revised: 11/21/2011] [Accepted: 12/09/2011] [Indexed: 01/12/2023]
Abstract
OBJECTIVE To investigate the independent associations between objectively measured levels of movement intensity (i.e., time spent sedentary and at light, moderate and vigorous intensities) and indicators of adiposity in a cohort of Canadian children. METHODS A cross-sectional study was conducted in 550 Caucasian children aged 8-10 years with at least one obese biological parent. Physical activity and sedentary time (accelerometer over 7 d) and indicators of adiposity (% body fat measured by dual-energy X-ray absorptiometry and waist-to-height ratio) were objectively measured. We examined the associations between levels of movement intensity and adiposity in multi-level linear regression models adjusted for age, sex, sleep duration, energy intake, sexual maturation, parental socioeconomic status and parental body mass index. RESULTS Objectively measured sedentary time was not associated with adiposity indicators in this cohort (unadjusted and adjusted models). However, moderate-to-vigorous physical activity (MVPA) was inversely associated with % body fat (adj. β = -0.047; P = 0.02) and waist-to-height ratio (adj. β = -0.071; P < 0.001), independent of sedentary time and other covariates. Additionally, we observed that children who did not accumulate ≥60 min d(-1) of MVPA were more likely to be overweight or obese compared to those who met the recommendation (odds ratio [OR] 2.22, 95% confidence interval [CI] 1.45-3.38). In contrast, there was no difference in the likelihood of being categorized as overweight or obese between those who met the recommendation of ≤2 h d(-1) of screen time and those who did not meet this recommendation (OR 1.27, 95% CI 0.75-2.01). CONCLUSION The present study suggests that MVPA is independently associated with adiposity indices in this sample of children while sedentary time is not. Future studies should examine the best approach to increase MVPA in children and youth.
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Affiliation(s)
- J P Chaput
- Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada.
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Colapinto CK, O'Connor DL, Dubois L, Tremblay MS. P1-117 Determinants of folate concentration in Canadian women of childbearing age. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976d.11] [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: 11/04/2022]
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Carter MA, Dubois L, Tremblay MS. P1-107 Contextual circumstances and patterns of childhood weight change. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976c.100] [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: 11/04/2022]
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Colapinto CK, O'Connor DL, Dubois L, Tremblay MS. O1-5.5 Determinants of high folate concentration in the Canadian population. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976a.40] [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: 11/04/2022]
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Ware SAP, Kristjansson EA, Russell K, Billette JM, Ali A, Sawada M, Tremblay MS, Prud'homme D. O5-2.1 Is it where you live or who you are that is important? An analysis of neighbourhood environments, self-reported physical activity and overweight / obesity in Canada's capital. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976b.43] [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: 11/04/2022]
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Abstract
The purposes of this study were to: (i) provide contemporary estimates of the prevalence of abdominal obesity, as assessed by waist circumference (WC), in Canadian adolescents and adults; (ii) provide estimates of the prevalence of abdominal obesity within normal weight, overweight and obese body mass index categories and (iii) examine secular changes in abdominal obesity. Data were based on three national health surveys conducted in 1981, 1988 and 2007-2009. WC was measured at the mid-point between the last rib and iliac crest in all three surveys. The prevalence of Canadians with abdominal obesity increased with age and was higher in females than in males. In 12- to 19-year-old adolescents, the estimated prevalence of abdominal obesity was 1.8% in 1981, 2.4% in 1988 and 12.8% in 2007-2009. The corresponding values for 20- to 69-year-old adults were 11.4%, 14.2% and 35.6%. Between 1981 and 2007-2009, mean WC values increased by 4.2 cm in adolescent males, 6.7 cm in adolescent females, 6.5 cm in men and 10.6 cm in women. Within the 2007-2009 survey, 2.6% of normal weight adults had abdominal obesity, 35.3% of overweight adults had abdominal obesity and 93.0% of obese adults had abdominal obesity.
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Affiliation(s)
- I Janssen
- School of Kinesiology & Health Studies, Queen's University, Kingston, Ontario, Canada.
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Plotnikoff RC, Lightfoot P, McFall S, Spinola C, Johnson ST, Prodaniuk T, Predy G, Tremblay MS, Svenson L. Child Health Ecological Surveillance System (CHESS) for childhood obesity: a feasibility study. Chronic Dis Can 2010; 30:95-106. [PMID: 20609293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To assess the feasibility of employing an ecologically guided childhood obesity relevant surveillance system. METHODS Cross-sectional qualitative and quantitative data were collected from 31 organizational representatives across 28 unique organizations and/or departments from three purposively sampled communities in the Capital Health Region in Alberta, Canada. RESULTS All the organizational representatives surveyed reported awareness of childhood obesity and 36% reported participation in child obesity initiatives. Data to support a surveillance system are available but not in a suitable format, and privacy legislation present significant barriers. Interest in developing and sustaining an ecologically based surveillance system was low (18%). CONCLUSION Due to the heterogeneity of available data and limited vision for the development and implementation of a surveillance system, the application of an ecologically based surveillance system relevant to childhood obesity may be constrained. Broad-based awareness of childhood obesity by a wide range of organizations could assist in establishing an effective coalition to address this issue over the long term by supporting the establishment of a surveillance system.
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Affiliation(s)
- R C Plotnikoff
- School of Education, University of Newcastle, Callaghan, NSW 2308, Australia.
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Rotermann M, Bryan S, Tremblay MS. 016: Seasonal Variation Among the 5 Most Popular Leisure-Time Physical Activities in Canada. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s4c] [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: 11/12/2022] Open
Affiliation(s)
| | - S Bryan
- Statistics Canada, Ottawa, Canada
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Abstract
OBJECTIVE This study examined the relation among children's physical activity, sedentary behaviours, and body mass index (BMI), while controlling for sex, family structure, and socioeconomic status. DESIGN Epidemiological study examining the relations among physical activity participation, sedentary behaviour (video game use and television (TV)/video watching), and BMI on a nationally representative sample of Canadian children. SUBJECTS A representative sample of Canadian children aged 7-11 (N=7216) from the 1994 National Longitudinal Survey of Children and Youth was used in the analysis. MEASUREMENTS Physical activity and sport participation, sedentary behaviour (video game use and TV/video watching), and BMI measured by parental report. RESULTS Both organized and unorganized sport and physical activity are negatively associated with being overweight (10-24% reduced risk) or obese (23-43% reduced risk), while TV watching and video game use are risk factors for being overweight (17-44% increased risk) or obese (10-61% increased risk). Physical activity and sedentary behaviour partially account for the association of high socioeconomic status and two-parent family structure with the likelihood of being overweight or obese. CONCLUSION This study provides evidence supporting the link between physical inactivity and obesity of Canadian children.
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Affiliation(s)
- M S Tremblay
- College of Kinesiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
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Tremblay MS, Katzmarzyk PT, Willms JD. Temporal trends in overweight and obesity in Canada, 1981-1996. Int J Obes Relat Metab Disord 2002; 26:538-43. [PMID: 12075581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
OBJECTIVE To assess changes in the prevalence of overweight and obesity among Canadian children and adults between 1981 and 1996 using recent recommendations for the classification of overweight and obesity. DESIGN Epidemiological study comparing the prevalence of overweight and obesity from the 1981 Canada Fitness Survey (CFS) to the 1996 National Longitudinal Survey of Children and Youth (NLSCY) and the 1996 National Population Health Survey (NPHS). SUBJECTS Adults 20-64 y of age and children 7-13 y of age from the CFS, NLSCY and NPHS. MEASUREMENTS BMI was calculated from directly measured or self-reported body mass and height. For adults 20-64 y of age, overweight and obesity were defined as BMI > or = 25 kg/m2 and BMI > or = 30 kg/m2, respectively. Age- and sex-specific cut-off points for children that correspond to the adulthood categories were used to define overweight and obesity for children 7-13 y of age. RESULTS The prevalence of overweight increased from 48 to 57% among men and from 30 to 35% among women, while the prevalence of obesity increased from 9 to 14% in men and from 8 to 12% in women. The corresponding increases were from 11 to 33% in boys and from 13 to 27% in girls for overweight and from 2 to 10% in boys and from 2 to 9% in girls for obesity. CONCLUSION The results indicate dramatic increases in the prevalence of both overweight and obesity in Canada over the last 15 y, and the problem is particularly pronounced among children.
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Affiliation(s)
- M S Tremblay
- College of Kinesiology, University of Saskatchewan, Saskatoon, Canada.
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Consitt LA, Copeland JL, Tremblay MS. Hormone responses to resistance vs. endurance exercise in premenopausal females. Can J Appl Physiol 2001; 26:574-87. [PMID: 11842274 DOI: 10.1139/h01-032] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Sixteen, cross-trained, premenopausal women participated in an endurance, resistance, and control session to compare hormone responses. The resistance session included 3 sets of eight exercises at 10 RM intensity. The endurance session consisted of a 40-min cycling protocol at 75% of maximal heart rate. During the control session, subjects rested for 35 min. Serum DHEA, estradiol, testosterone, growth hormone, IGF-I, cortisol, and plasma lactate concentrations were measured pre-exercise, post-exercise, and 30 min into recovery. Differences in intensity variables existed between the three sessions. Endurance exercise elicited increases in growth hormone, estradiol, and testosterone compared to the control session, and growth hormone increased after the resistance compared to the control session. The exercise protocols used in this study indicate that an acute bout of exercise can stimulate the endocrine system in premenopausal females. In addition, these results indicate that differences exist between these two exercise protocols when compared to a control session.
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Affiliation(s)
- L A Consitt
- Faculty of Kinesiology, University of New Brunswick, Canada
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Abstract
PURPOSE The purpose of this study was to explore the validity of the Assessment of Young Children's Activity Using Video Technology (ACTIVITY) self-report instrument in assessing previous-day physical activity. METHODS Forty-seven third-grade children (mean age 7.72 +/- 0.45, 41% female) from one elementary school completed the ACTIVITY on one weekday. To evaluate concurrent validity, children wore a Caltrac accelerometer and a Polar Vantage XL heart rate monitor on the day before completing the ACTIVITY. An ACTIVITY score from six time-anchored questions was obtained from the ACTIVITY. Mean Caltrac counts per minute (CNTSMIN), average activity heart rates, and cumulative minutes at or above 50% of heart rate reserve (50% HRR) were calculated for the entire day (7:00 a.m. to 7:00 p.m.). RESULTS Significant Pearson product-moment correlations were observed between the ACTIVITY score and CNTSMIN (r = 0.40, P < 0.001) and 50% HRR (r = 0.50, P < 0.001). Answers from four of six time-anchored questions correlated significantly with heart rate scores during those time periods (r = 0.30-0.49). CONCLUSIONS This exploratory study suggests that the ACTIVITY self-report instrument is a moderately valid instrument for measuring general activity levels of young children during the school year, including during specified periods of time. The potential for video technology to facilitate accurate physical activity recall in young children warrants further study.
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Affiliation(s)
- M S Tremblay
- Faculty of Kinesiology and Canadian Research Institute for Social Policy, University of New Brunswick, New Brunswick, Canada.
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Tremblay MS, Shephard RJ, McKenzie TL, Gledhill N. Physical activity assessment options within the context of the Canadian Physical Activity, Fitness, and Lifestyle Appraisal. Can J Appl Physiol 2001; 26:388-407. [PMID: 11487710 DOI: 10.1139/h01-024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The Canadian Physical Activity, Fitness, and Lifestyle Appraisal (CPAFLA) is a standardized battery of tests that is commonly used to assess asymptomatic individuals. This paper reviews evidence concerning the reliability, validity, and utility of the procedure currently used to assess habitual physical activity in the CPAFLA and surveys available physical activity assessment options. Special considerations related to age, gender, ethnicity, seasonal variations, and within-week variance are discussed. The potential assessment options are discussed with consideration given to the logistical and pragmatic constraints inherent in the CPAFLA. New technologies for future assessment of physical activity are briefly presented and recommendations for future research forwarded.
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Affiliation(s)
- M S Tremblay
- College of Kinesiology, University of Saskatchewan
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Tremblay MS, Willms JD. Secular trends in the body mass index of Canadian children. CMAJ 2000; 163:1429-33. [PMID: 11192647 PMCID: PMC80409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
BACKGROUND Various changes in society have created the opportunity for more sedentary behaviour and the consumption of food that is high in kilojoules, which may lead to a progressive increase in body mass over time. The purpose of this study was to examine secular changes in the body mass index (BMI) of Canadian children between 1981 and 1996. METHODS Nationally representative data from the 1981 Canada Fitness Survey, the 1988 Campbell's Survey on the Well-being of Canadians and the 1996 National Longitudinal Survey of Children and Youth were used in the analysis. Regression analyses were used to assess population changes in BMI from 1981 to 1996 for children aged 7-13 years. Changes in the distribution of BMI results were evaluated by plotting the residuals from regression analyses of BMI on age, assessed separately by sex, using the 1981 data as baseline. The proportions of children exceeding the 85th and 95th age- and sex-specific percentiles from the 1981 (baseline) data were also calculated. RESULTS Since 1981, BMI has increased at the rate of nearly 0.1 kg/m2 per year for both sexes at most ages, indicating a clear secular trend toward an increase in BMI of Canadian children. The prevalence of overweight among boys increased from 15% in 1981 to 28.8% in 1996 and among girls from 15% to 23.6%. The prevalence of obesity in children more than doubled over that period, from 5% to 13.5% for boys and 11.8% for girls. INTERPRETATION Secular trends indicate that Canadian children aged 7-13 years are becoming progressively overweight and obese.
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Affiliation(s)
- M S Tremblay
- Faculty of Kinesiology, University of New Brunswick, Fredericton, NB.
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Galloway SD, Tremblay MS, Sexsmith JR, Roberts CJ. The effects of acute phosphate supplementation in subjects of different aerobic fitness levels. Eur J Appl Physiol Occup Physiol 1996; 72:224-30. [PMID: 8820890 DOI: 10.1007/bf00838643] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Six trained cyclists (high-fitness group) and six untrained individuals (low-fitness group), performed a 20-min cycle ergometer exercise test at 70% of maximum oxygen consumption (VO2max) followed by a 30-min rest period and then an incremental ride to exhaustion on two occasions, 1 week apart. Ninety minutes prior to exercise subjects consumed a drink containing either 22.2 g dibasic calcium phosphate (DCP; treatment) or calcium carbonate (placebo). Blood was drawn prior to drink ingestion, during submaximal exercise, during recovery and at exhaustion for determination of blood 2,3-DPG, blood ATP, plasma lactate, plasma phosphate, haemoglobin and haematocrit. Throughout exercise, cardiorespiratory variables [oxygen uptake (VO2), minute ventilation, (VE), respiratory exchange ratio, heart rate and oxygen pulse] were monitored, and ratings of perceived exertion obtained. Although there was a trend for the low-fitness group to have a higher plasma phosphate concentration prior to treatment ingestion, no treatment effects on plasma phosphate were noted at any sample time in either group. 2,3-DPG, VO2, oxygen pulse, VE, time to exhaustion and VO2max were significantly higher in the high-fitness group; however, no differences in these variables were observed as a result of phosphate ingestion. Plasma lactate was significantly lower in the high-fitness group during the submaximal exercise and the recovery period, but again phosphate ingestion had no effect. These results suggest that acute DCP supplementation is not effective as an ergogenic aid and that aerobic fitness level does not affect the response to phosphate supplementation.
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Affiliation(s)
- S D Galloway
- Faculty of Physical Education and Recreation, University of New Brunswick, Canada
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Abstract
Improvements in laboratory techniques have allowed research related to exercise endocrinology to flourish. The emerging literature, however, is often inconsistent and contradictory. The discrepancies in research findings are possibly the result of poor control of confounding variables and/or inappropriate methodologies or analyses. Environmental and pretesting behavioural conditions must be standardised to minimise the influence of variables not directly related to the investigation. Environmental temperature and relative humidity, alcohol, caffeine and nicotine intake, prandial state, sleep deprivation and previous exercise can each alter hormonal responses to exercise. Both prescription and over-the-counter medications can also modify normal hormonal secretions thereby confusing exercise-induced findings. Specimen collection and analysis procedures must be controlled carefully. Changes in plasma volume related to postural changes or tourniquet-induced stasis can confound attempts to isolate exercise-related endocrine responses. The established circadian and rhythmical variations characteristic of many hormones need to be controlled. The specimen selection (plasma, serum, urine, etc), collection, storage and analysis procedures should be carefully planned and evaluated. The magnitude of haemolysis, analytical and biological variation must also be monitored. Isolating the hormonal perturbations resulting from a particular exercise variable can be very difficult. Exercise intensity, duration, mode, frequency and volume may each have specific effects on the endocrine changes seen with exercise and training. Furthermore, hormonal responses to exercise are dependent upon initial training status and fitness level. The statistical procedures and data presentation options selected to convey experimental findings can bias experimental results. The descriptive and inferential statistics to be used for data analysis should be preplanned and consistent with the underlying assumptions of the analytical procedure. Careful consideration should be given to the biological relevance of statistically significant findings. In some cases, data transformations (e.g. absolute vs relative changes, logarithmic) should be considered for analysis or presentation. Given the individual nature of hormonal responses to exercise, emphasis should be placed presenting individual data. Other considerations, including age, sex, racial origin and disease conditions need to be controlled for when trying to examine exercise-induced hormone changes.
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Affiliation(s)
- M S Tremblay
- Faculty of Physical Education and Recreation, University of New Brunswick, Fredericton, Canada
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Deschênes A, Tremblay MS, Bothwell-Myers C. THE PHYSICAL FITNESS PERFORMANCE OF GRADE ONE CHILDREN WITH DEVELOPMENTAL COORDINATION DIFFICULTIES. Med Sci Sports Exerc 1995. [DOI: 10.1249/00005768-199505001-01339] [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: 11/21/2022]
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Roberts CJ, Galloway SD, Sexsmith JR, Tremblay MS. 132 EFFECTS OF ACUTE DIBASIC CALCIUM PHOSPHATE SUPPLEMENTATION ON VENTILATORY AND LACTATE METABOLIC THRESHOLDS. Med Sci Sports Exerc 1994. [DOI: 10.1249/00005768-199405001-00133] [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: 11/21/2022]
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Galloway SDR, Sexsmith JR, Tremblay MS, Roberts CJ. 133 THE EFFECTS OF ACUTE PHOSPHATE SUPPLEMENTATION IN SUBJECTS OF DIFFERENT AEROBIC FITNESS LEVELS. Med Sci Sports Exerc 1994. [DOI: 10.1249/00005768-199405001-00134] [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: 11/21/2022]
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Abstract
Modifications were made to the Series III-311 Omnikinetic Hydra-Gym apparatus (Hydra-Fitness Industries Inc., Belton, TX) in an effort to provide relatively inexpensive yet clinically useful isokinetic strength measurements. Signal transmission and processing functions were installed to calculate relevant strength characteristics for knee extension/flexion motions. Results from the modified Hydra-Gym were compared with matched procedures on the Kin-Com (model 500-10, Chattecx Corporation, Chattanooga, TN). Subjects (N = 10) performed three maximal concentric right knee extension/flexion cycles at different resistance settings (2, 4, and 6) on the Hydra-Gym and the corresponding angular velocities on the Kin-Com (190, 125, and 40 degrees/sec, respectively). Each subject completed eight testing sessions, four on each dynamometer. A five-way analysis of variance on the peak torque data revealed no significant difference between dynamometers; however, there was a significant interaction between dynamometer and extension/flexion measurements. The variance in angle of peak torque data was significantly different between dynamometers, with Hydra-Gym showing superior reproducibility (p < 0.005). Mechanical differences between dynamometers produced slightly different, though comparable and consistent, measurement values. Care must be taken when evaluating hamstring/quadriceps ratios from the Hydra-Gym because the interaction noticed between dynamometer and extension/flexion may exaggerate muscle imbalances. In summary, modifications to the Hydra-Gym appear to provide clinicians with a reliable and clinically useful strength testing alternative.
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Affiliation(s)
- M S Tremblay
- Faculty of Physical Education and Recreation, University of New Brunswick, Fredericton, Canada
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Tremblay MS, Galloway SD, Sexsmith JR. Ergogenic effects of phosphate loading: physiological fact or methodological fiction? Can J Appl Physiol 1994; 19:1-11. [PMID: 8186760 DOI: 10.1139/h94-001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Inorganic phosphate (Pi) supplementation has been reported to provide ergogenic benefits, though the research findings are inconsistent. Several confounding influences may explain these results, including mode of exercise, exercise intensity, dietary intake, daily biological fluctuations, type of supplement, administered dose of the supplement, washout period, length of loading period, fitness level of subjects, blood volume alterations, and sample collection and analysis techniques. This review provides a critical analysis of the methodological difficulties that may contribute to the equivocal research findings pertaining to Pi supplementation.
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Affiliation(s)
- M S Tremblay
- Faculty of Physical Education and Recreation, University of New Brunswick, Fredericton
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Sexsmith JR, Galloway SD, Tremblay MS, Roberts CJ. 1084 EFFECTS OF ACUTE PHOSPHATE SUPPLEMENTATION ON CARDIO-RESPIRATORY AND HEMATOLOGICAL RESPONSES TO EXERCISE. Med Sci Sports Exerc 1993. [DOI: 10.1249/00005768-199305001-01087] [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: 11/21/2022]
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VanHelder WP, Kofman E, Tremblay MS. Anabolic steroids in sport. Can J Sport Sci 1991; 16:248-57. [PMID: 1663826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The use of androgenic-anabolic steroids (AAS) for enhancing athletic performance and body image is widespread. An increasing number of elite and recreational athletes of varying ages and athletic pursuits are using AAS. Sophisticated patterns of AAS use are supported by unethical and illegal distribution channels. Various testosterone-derived preparations attempt to manipulate pharmacological characteristics in an effort to maximize anabolic potential while minimizing androgenic effects. Although anecdotal and theoretical information suggests that AAS have positive ergogenic properties, the experimental evidence is equivocal. In addition to the ethical and legal implications of using AAS, there are diverse, though often reversible, medical and behaviour ramifications. In an effort to control and discourage AAS use, relevant sport governing bodies have implemented various testing and educational programs with undetermined success.
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Affiliation(s)
- W P VanHelder
- School of Physical and Health Education, University of Toronto, Ontario
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