Premium
Excess post‐activity oxygen consumption (EPOC) associated with moderate intensity physical activity recommended in the Dietary Guidelines
Author(s) -
Keim Nancy L.,
Horn William F.
Publication year - 2006
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.20.4.a588-c
Subject(s) - medicine , energy expenditure , overweight , physical activity , metabolic equivalent , physical activity level , intensity (physics) , zoology , energy balance , doubly labeled water , resting energy expenditure , basal metabolic rate , physical therapy , obesity , physics , quantum mechanics , ecology , biology
The Dietary Guidelines for Americans (2005) recommend that adults engage in 60 min of moderate physical activity (PA) on most days of the week to avoid unhealthy weight gain. PA increases energy expenditure during and following the activity; in the post‐activity period the excess oxygen consumption is referred to as EPOC. Our objective was to determine the magnitude of EPOC and associated excess post‐activity energy expenditure (EPEE) following a 60 min moderate intensity walking workout in women. A 2 nd objective was to determine if dietary energy intake level influenced EPOC. Overweight or obese women (BMI 25‐40 kg/m 2 ; age 25‐45 y), were assigned to either the energy balance (EB; n=14) or energy deficit (ED; n=14) diet treatment group. EB subjects were given a complete diet for 3 consecutive days with energy intake adequate to maintain current body weight immediately before testing; ED subjects received the same foods, reduced in amount to achieve a 50% ED for 3 d. Energy expenditure during resting (REE), walking (PAEE), and 2‐h post‐activity were measured by indirect calorimetry. There were no differences in REE or PAEE values between EB and ED: 1.01 ∀ 0.03 vs 0.93 ∀ 0.03 kcal/min for REE; 6.63 ∀ 0.27 vs 6.18 ∀ 0.34 kcal/min for PAEE. The PAEE values represented intensity level of 55 ∀ 1% of VO 2 max for both groups. EPOC averaged 19 ∀ 2% above resting VO 2 values in the 2‐h post‐activity period for both groups; total EPEE was 25 ∀ 5 vs 25 ∀ 6 kcal for EB and ED, respectively. These data indicate that in response to the moderate activity recommended in the Guidelines, EPOC is small and is not affected by restricted energy intake. Supported by USDA Intramural Funds.