A mixed ecologic-cohort comparison of physical activity & weight among young adults from five populations of African origin

BMC Public Health

Richard S Cooper⁵  Ulf Ekelund⁷  Soren Brage³  Guichan Cao⁵  David A Shoham⁵  Ramon A Durazo-Arvizu⁵  Lara R Dugas⁵  Dale A Schoeller⁴  Estelle V Lambert⁸  Terrence E Forrester⁶  Jacob Plange-Rhule¹  Pascal Bovet²  Amy Luke⁵ 

[1] Kwame Nkrumah University of Science and Technology, Kumasi, Ghana;Institute of Social & Preventive Medicine, Lausanne University Hospital, Ministry of Health, Republic of Seychelles, Lausanne, Switzerland;MRC Epidemiology Unit, Addenbrooke’s Hospital, Cambridge, UK;University of Wisconsin, Madison, WI, USA;Stritch School of Medicine, Loyola University Chicago, Maywood, IL, USA;Tropical Medicine Research Institute, University of the West Indies, Mona, Kingston, Jamaica;Department of Sport Medicine, Norwegian School of Sport Sciences, Oslo, Norway;Research Unit for Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa

关键词: Epidemiologic transition;    Obesity;    Physical activity;   

Others  :  1131485
DOI  :  10.1186/1471-2458-14-397

 received in 2013-10-11, accepted in 2014-03-30,  发布年份 2014

【 摘 要 】

Background

Examination of patterns and intensity of physical activity (PA) across cultures where obesity prevalence varies widely provides insight into one aspect of the ongoing epidemiologic transition. The primary hypothesis being addressed is whether low levels of PA are associated with excess weight and adiposity.

Methods

We recruited young adults from five countries (500 per country, 2500 total, ages 25–45 years), spanning the range of obesity prevalence. Men and women were recruited from a suburb of Chicago, Illinois, USA; urban Jamaica; rural Ghana; peri-urban South Africa; and the Seychelles. PA was measured using accelerometry and expressed as minutes per day of moderate-to-vigorous activity or sedentary behavior.

Results

Obesity (BMI ≥ 30) prevalence ranged from 1.4% (Ghanaian men) to 63.8% (US women). South African men were the most active, followed by Ghanaian men. Relatively small differences were observed across sites among women; however, women in Ghana accumulated the most activity. Within site-gender sub-groups, the correlation of activity with BMI and other measures of adiposity was inconsistent; the combined correlation across sites was -0.17 for men and -0.11 for women. In the ecological analysis time spent in moderate-to-vigorous activity was inversely associated with BMI (r = -0.71).

Conclusion

These analyses suggest that persons with greater adiposity tend to engage in less PA, although the associations are weak and the direction of causality cannot be inferred because measurements are cross-sectional. Longitudinal data will be required to elucidate direction of association.

【 授权许可】

   
2014 Luke et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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