Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province
| dc.contributor.author | Cook, Ian | |
| dc.contributor.author | Alberts, Marianne | |
| dc.contributor.author | Lambert, Estelle V | |
| dc.date.accessioned | 2018-03-12T08:19:36Z | |
| dc.date.available | 2018-03-12T08:19:36Z | |
| dc.date.issued | 2010 | |
| dc.date.updated | 2016-01-15T08:05:31Z | |
| dc.description.abstract | Objectives. We developed a novel approach to investigate patterns of pedometry-measured total weekly activity energy expenditure (EEAct) in rural black South Africans in the Limpopo Province. Design. We analysed 7-day pedometry data in 775 subjects (female: N=508; male: N=267). Variance components models for EEAct were used to estimate the variance explained by body mass (BM), total weekly steps (volume) and estimated intensity (kcal. kg-1.step-1). Univariate General Linear Models, adjusting for age, BM and physical activity (PA) volume, were used to determine if EEAct was primarily affected by volume or intensity. Results. BM (13.1%), PA intensity (24.4%) and PA volume (56.9%) explained 94.4% of the variance in EEAct. Adjusted EEAct did not differ between sexes (78 kcal.week-1, p =0.2552). There were no significant differences across activity categories (sedentary to very active) for adjusted EEAct (62 - 287 kcal.week-1, p>0.1). Adjusted EEAct for 6 - 7 days of compliance (≥10 000 steps.day-1) differed significantly from 1 - 2 days of compliance (266 - 419 kcal.week-1, p<0.04). Obese (body mass index ≥30 kg.m-2) and normal weight (body mass index 18.5 - 24.9 kg.m-2) women did not differ significantly across activity categories for EEAct (200 - 592 kcal.week-1, p>0.30). Conclusions. We have highlighted an intensity effect for days of compliance and at very active ambulatory levels (≥12 500 steps. day-1). A volume effect appeared to dominate between sexes, across activity categories and weight-by-activity categories. It is important that post hoc statistical adjustments be made for body mass and PA volume when comparing EEAct across groups. | |
| dc.identifier.apacitation | Cook, I., Alberts, M., & Lambert, E. V. (2010). Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province. <i>South African Journal of Sport Medicine</i>, http://hdl.handle.net/11427/27632 | en_ZA |
| dc.identifier.chicagocitation | Cook, Ian, Marianne Alberts, and Estelle V Lambert "Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province." <i>South African Journal of Sport Medicine</i> (2010) http://hdl.handle.net/11427/27632 | en_ZA |
| dc.identifier.citation | Cook, I., Alberts, M., & Lambert, E. V. (2010). Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province. South African Journal of Sports Medicine, 22(1), 3-7. | |
| dc.identifier.ris | TY - Journal Article AU - Cook, Ian AU - Alberts, Marianne AU - Lambert, Estelle V AB - Objectives. We developed a novel approach to investigate patterns of pedometry-measured total weekly activity energy expenditure (EEAct) in rural black South Africans in the Limpopo Province. Design. We analysed 7-day pedometry data in 775 subjects (female: N=508; male: N=267). Variance components models for EEAct were used to estimate the variance explained by body mass (BM), total weekly steps (volume) and estimated intensity (kcal. kg-1.step-1). Univariate General Linear Models, adjusting for age, BM and physical activity (PA) volume, were used to determine if EEAct was primarily affected by volume or intensity. Results. BM (13.1%), PA intensity (24.4%) and PA volume (56.9%) explained 94.4% of the variance in EEAct. Adjusted EEAct did not differ between sexes (78 kcal.week-1, p =0.2552). There were no significant differences across activity categories (sedentary to very active) for adjusted EEAct (62 - 287 kcal.week-1, p>0.1). Adjusted EEAct for 6 - 7 days of compliance (≥10 000 steps.day-1) differed significantly from 1 - 2 days of compliance (266 - 419 kcal.week-1, p<0.04). Obese (body mass index ≥30 kg.m-2) and normal weight (body mass index 18.5 - 24.9 kg.m-2) women did not differ significantly across activity categories for EEAct (200 - 592 kcal.week-1, p>0.30). Conclusions. We have highlighted an intensity effect for days of compliance and at very active ambulatory levels (≥12 500 steps. day-1). A volume effect appeared to dominate between sexes, across activity categories and weight-by-activity categories. It is important that post hoc statistical adjustments be made for body mass and PA volume when comparing EEAct across groups. DA - 2010 DB - OpenUCT DP - University of Cape Town J1 - South African Journal of Sport Medicine LK - https://open.uct.ac.za PB - University of Cape Town PY - 2010 T1 - Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province TI - Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province UR - http://hdl.handle.net/11427/27632 ER - | en_ZA |
| dc.identifier.uri | http://hdl.handle.net/11427/27632 | |
| dc.identifier.vancouvercitation | Cook I, Alberts M, Lambert EV. Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province. South African Journal of Sport Medicine. 2010; http://hdl.handle.net/11427/27632. | en_ZA |
| dc.language.iso | eng | |
| dc.publisher.department | MRC/UCT RU for Exercise and Sport Medicine | en_ZA |
| dc.publisher.faculty | Faculty of Health Sciences | en_ZA |
| dc.publisher.institution | University of Cape Town | |
| dc.source | South African Journal of Sport Medicine | |
| dc.source.uri | http://www.ajol.info/index.php/sasma/article/view/70166 | |
| dc.title | Effect of body mass and physical activity volume and intensity on pedometry-measured activity energy expenditure in rural black South Africans in the Limpopo Province | |
| dc.type | Journal Article | |
| uct.type.filetype | Text | |
| uct.type.filetype | Image |