Exercise training and habitual physical activity: A randomized controlled trial

Damon L. Swift, N M Johannsen, Catrine Tudor-Locke, Conrad Earnest, William Johnson, Steven N. Blair, Martin Senechal, Timothy S. Church

Research output: Contribution to journalArticlepeer-review

21 Citations (SciVal)


Background: Exercise training reduces adiposity and risk of cardiovascular disease. However, the combined effects of habitual free-living physical activity and aerobic training on waist circumference, weight, fıtness, and blood pressure in postmenopausal women are unknown.

Purpose: To evaluate the effects of habitual physical activity levels during aerobic training on weight, waist circumference, fıtness, and blood pressure.
Design: Secondary analysis of an RCT. Original data collected April 2001 to June 2005 and analyzed in 2012.

Setting/participants: Postmenopausal women in a supervised exercise trial.
Intervention: Women (n325) were randomized to 4, 8, or 12 kcal/kg per week of aerobic training or a control group for 6 months. All outcome measures were collected at baseline and follow-up. Changes in dependent variables within each training group were evaluated across tertiles of pedometerdetermined
habitual physical activity outside exercise training sessions.

Main outcome measures: Changes in waist circumference and weight.

Results: Reductions in waist circumference were signifıcantly greater with higher steps/day accumulated outside exercise training compared to lower levels in the 4 (high:4.8 cm vs low:1.4 cm, p0.03); 8 (high:4.2 cm vs low:0.4 cm, p0.03), and 12 kcal/kg per week groups (high:4.1 cm vs low: 0.7 cm, p0.05). For all groups, p-trend0.03. A trend was observed for greater weight reduction with higher steps/day in the 4 kcal/kg per week group (p-trend0.04) but not for the other exercise doses. No effects were observed for blood pressure or fıtness measures (all p0.05).

Conclusions: In postmenopausal women, higher habitual physical activity while participating in aerobic training was associated with greater reductions in central adiposity, and was supportive of weight loss compared to lower levels.
Original languageEnglish
Pages (from-to)629-635
Number of pages7
JournalAmerican Journal of Preventive Medicine
Issue number6
Publication statusPublished - Dec 2012


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