The effect of an incremental increase in exercise on appetite, feeding behaviour and energy balance in lean men and women feeding ad libitum

Abstract
Abstract The effects of incremental exercise on appetite, energy intake (EI), expenditure (EE) and balance (EB) in lean men and women were examined. Six men (mean (SD) age 29.7 (5.9) years, weight 75.2 (15.3) kg, height 1.75 (0.11) m) and six women (mean (SD) age 24.7 (5.9) years, weight 66.7 (9.10) kg, height 1.70 (0.09) m) were each studied three times during a 16-d protocol, corresponding to no additional exercise (Nex), medium intensity exercise (Mex, 1.5-2.0 MJ/d) and high-intensity exercise (Hex, 3.0-4.0 MJ/d) regimes. During days 1-2 subjects were fed to EB, and during days 3-16 they fed ad libitum from a medium fat diet of constant composition. Total daily EE was assessed using the doubly labelled water method. Total daily EE amounted to 9.2, 11.6 and 13.7 MJ/d, (P<0.001; SED = 0.45), for the women and 12.2, 14.0 and 16.7 MJ/d, (P=0.007; SED = 1.11) for the men on the Nex, Mex and Hex treatments, respectively. EI was 8.3, 8.6 and 9.9 MJ/d, (P=0.118; SED = 0.72), for the women and 10.6, 11.6 and 12.0 MJ/d, (P=0.031; SED = 0.47) for the men, respectively. On average subjects compensated for ~30% of the exercise induced energy deficit. This rose to 56% if those suspected of poor compliance to the diet were excluded. The degree of compensation varied considerably. This study captured the initial compensation of EI for exercise induced energy deficits. Total compensation would take a matter of weeks.
Year
2008
Category
Refereed journal
Output Tags
SG 2006-2011 WP 4.2 Metabolic Health