Journal
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
Volume 41, Issue 8, Pages 1640-1644Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1249/MSS.0b013e31819c71a4
Keywords
ACCELEROMETER; OBESITY; WALKING; ACTIVITY COUNTS; CALORIC EXPENDITURE
Categories
Funding
- National Institutes of Health [HL-573540]
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HOLLOWELL, R. P., L, H. WILLIS, C. A, SLENTZ, J. D, TOPPING, M. BHAKPAR, and W. E. KRAUS. Effects of Exercise Training Amount on Physical Activity Energy Expenditure. Med. Sci. Sports Exerc., Vol. 41, No. 8, pp. 1640-1644, 2009. Introduction: We examined the effects of three exercise training interventions on total physical activity energy expenditure (PAEE) or nonexercise PAEE in a randomized controlled trial where sedentary, overweight, and obese men and women were assigned to inactive control. low-amount/moderate-intensity, low-amount/vigorous-intensity, or high-amount/vigorous-intensity aerobic exercise. Methods: To measure PAEE, triaxial RT3 accelerometers were worn by subjects for 7 d at the beginning and end of an 8-month exercise intervention. In total, 50 subjects (control, n = 8; two low-amount groups. n = 28: high-amount group. n = 14) had usable PAEE data collected at both time points. Results: At baseline, subjects had an average age of 53.2 yr, had a body mass index of 29.7 kg.m(-2), and a relative peak VO2 of 28.7 mL.kg(-1).min(-1). There were no significant differences between groups at baseline. After the intervention, average change in total PAEE was 8.4 +/- 20.9 kJ.h(-1) for controls, 58.6 +/- 20.9 kJ.h(-1) for the two low-amount groups, and 138.1 +/- 33.5 kJ.h(-1) for the high-amount group (means +/- SE). The high-amount group experienced a significantly greater increase in total PAEE compared with the controls (P = 0.02). As expected, total PAEE increased with increasing exercise volume. Average change in nonexercise PAEE was 8.4 +/- 20.9 kJ.h(-1) for control, 25.1 +/- 20.9 kJ.h(-1) for the low-amount groups. Combined, and 62.8 +/- 29.3 kJ.h(-1) for the high-amount group. There was no statistically significant difference in change of nonexercise PAEE among groups. Conclusions: We Conclude that in middle-aged overweight or obese subjects participating in an extended exercise intervention. total PAEE increased, and there was no compensatory decrease in nonexercise PAEE.
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