BACKGROUND: It is unclear whether physical activity energy expenditure (PAEE) predicts changes in body composition. OBJECTIVE: The objective was to describe the independent associations between PAEE and changes in body composition in a population-based cohort. DESIGN: This was a prospective population-based study conducted in 739 (311 men and 428 women) healthy middle-aged (median age: 53.8 y) whites. The median follow-up was 5.6 y. PAEE (MJ/d) was assessed by heart rate monitoring, individually calibrated by using the FLEX heart rate method. Fat mass (FM) and fat-free mass (FFM) were assessed by bioimpedance. RESULTS: Body weight (BW) at follow-up was significantly related to baseline PAEE (P < 0.05) after adjustment for sex, baseline age, FM, FFM, and follow-up time. A significant interaction between PAEE and age (P = 0.023) was observed. After the subjects were stratified (above and below the median for age), BW increased by a mean (+/-SD) of 1.7 +/- 5.9 kg (P < 0.0001) in the younger cohort. In this group, follow-up FM was significantly associated with baseline PAEE (P = 0.036) after adjustment for confounders. In the older cohort, BW did not change between baseline and follow-up. In this group, in contrast with the younger population, follow-up BW, FM, and FFM were all significantly and positively associated with baseline PAEE (P < 0.01 for all). CONCLUSIONS: Baseline PAEE predicts a change in FM in younger adults, who as a group gained weight in this study. In contrast, baseline PAEE in older adults--who were on average weight stable--is associated with a gain in BW, which was explained by an increase in FM and FFM.
BACKGROUND: It is unclear whether physical activity energy expenditure (PAEE) predicts changes in body composition. OBJECTIVE: The objective was to describe the independent associations between PAEE and changes in body composition in a population-based cohort. DESIGN: This was a prospective population-based study conducted in 739 (311 men and 428 women) healthy middle-aged (median age: 53.8 y) whites. The median follow-up was 5.6 y. PAEE (MJ/d) was assessed by heart rate monitoring, individually calibrated by using the FLEX heart rate method. Fat mass (FM) and fat-free mass (FFM) were assessed by bioimpedance. RESULTS: Body weight (BW) at follow-up was significantly related to baseline PAEE (P < 0.05) after adjustment for sex, baseline age, FM, FFM, and follow-up time. A significant interaction between PAEE and age (P = 0.023) was observed. After the subjects were stratified (above and below the median for age), BW increased by a mean (+/-SD) of 1.7 +/- 5.9 kg (P < 0.0001) in the younger cohort. In this group, follow-up FM was significantly associated with baseline PAEE (P = 0.036) after adjustment for confounders. In the older cohort, BW did not change between baseline and follow-up. In this group, in contrast with the younger population, follow-up BW, FM, and FFM were all significantly and positively associated with baseline PAEE (P < 0.01 for all). CONCLUSIONS: Baseline PAEE predicts a change in FM in younger adults, who as a group gained weight in this study. In contrast, baseline PAEE in older adults--who were on average weight stable--is associated with a gain in BW, which was explained by an increase in FM and FFM.
Authors: John B Correa; John W Apolzan; Desti N Shepard; Daniel P Heil; Jennifer C Rood; Corby K Martin Journal: Appl Physiol Nutr Metab Date: 2016-03-14 Impact factor: 2.665
Authors: Lara R Dugas; Regina Harders; Sarah Merrill; Kara Ebersole; David A Shoham; Elaine C Rush; Felix K Assah; Terrence Forrester; Ramon A Durazo-Arvizu; Amy Luke Journal: Am J Clin Nutr Date: 2010-12-15 Impact factor: 7.045
Authors: Amy Luke; Lara R Dugas; Kara Ebersole; Ramon A Durazo-Arvizu; Guichan Cao; Dale A Schoeller; Adebowale Adeyemo; William R Brieger; Richard S Cooper Journal: Am J Clin Nutr Date: 2008-12-03 Impact factor: 7.045
Authors: Catrine Tudor-Locke; Meghan M Brashear; William D Johnson; Peter T Katzmarzyk Journal: Int J Behav Nutr Phys Act Date: 2010-08-03 Impact factor: 6.457
Authors: Todd M Manini; James E Everhart; Stephen D Anton; Dale A Schoeller; Steve R Cummings; Dawn C Mackey; Matthew J Delmonico; Douglas C Bauer; Eleanor M Simonsick; Lisa H Colbert; Marjolein Visser; Frances Tylavsky; Anne B Newman; Tamara B Harris Journal: Am J Clin Nutr Date: 2009-09-09 Impact factor: 7.045