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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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ORIGINAL ARTICLES BODY COMPOSITION, NUTRITION AND SUPPLEMENTATION
The Journal of Sports Medicine and Physical Fitness 2013 Aprile;53(2):162-8
Body mass index for athletes participating in swimming at the World Masters Games
Walsh J. 1, Climstein M. 2, Heazlewood I. T. 3, Kettunen J. 4, 5, Burke S. 6, Debeliso M. 7, Adams K. J. 8 ✉
1 Independent researcher, Sydney, Australia;
2 Faculty of Health Sciences and Medicine Bond University, Gold Coast, Australia;
3 Allied Health and Exercise and Sport Science School of Environmental and Life Sciences Charles Darwin University, Darwin, Northern Territory, Australia;
4 Medical Sciences, Arcada University of Applied Sciences, Helsinki, Finland;
5 Research Consult in ORTON Orthopaedic Hospital, ORTON Foundation, Helsinki, Finland;
6 School of Exercise Science, Faculty of Health Sciences, Australian Catholic University, Australia;
7 Department of Physical Education and Human Performance, Southern Utah University, Cedar City, UT, USA;
8 Kinesiology Department, California State University Monterey Bay, Seaside, CA, USA
Aim: Whilst there is growing evidence that physical activity across the lifespan is beneficial for improved health, there are many physiological changes involved with the aging process and subsequently the potential for reduced indices of health. The experimental aim was to gain improved understanding of the nexus between health, physical activity and aging by testing the hypothesis that prevalence of obesity (BMI ≥30 kg/m2) in the World Masters Games swimming cohort would be less than adult national populations.
Methods: Body mass index (BMI) of 527 (49.7% male, 50.3% female) World Masters Games (WMG) swimmers aged 25-91 yrs (mean 54.3, standard deviation ±12.2) was investigated using a survey tool.
Results: Analysis demonstrated significantly (χ2=44.9, P<0.001) reduced obesity (9% vs. 21%) when compared to the adult (aged ≥18years) Australian as well as other appropriate national populations. Investigation revealed, amongst other findings, that in line with trends shown in the adult Australian population, WMG male swimmers had a significantly higher BMI (mean 25.9 vs. 24.6) than their female counterparts (Z=-5.8, P<0.001).
Conclusion: Evidence of improved classification in one index of health (BMI ≥30 kg/m2) for WMG swimmers raised the possibility of improved classification due to adherence to sport or that reduced BMI was advantageous, contributing to this cohort competing at the WMG. This proportionately under-investigated population having reduced obesity over national populations was of particular interest given the obesity epidemic, the multi-faceted approaches taken globally in an attempt to halt this epidemic and a usual tendency for increased incidence of obesity with age.