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Int J Sports Med 2015; 36(13): 1106-1111
DOI: 10.1055/s-0035-1548767
Behavioural Sciences
© Georg Thieme Verlag KG Stuttgart · New York

Effects of Exercise Intervention on Habitual Physical Activity Above Lactate Threshold Under Free-living Conditions: A Randomized Controlled Trial

M. Ayabe
1   Faculty of Computer Science and Systems Engineering, Okayama Prefectural University, Okayama, Japan
2   Faculty of Health and Sports Science, Fukuoka University, Fukuoka, Japan
,
H. Kumahara
2   Faculty of Health and Sports Science, Fukuoka University, Fukuoka, Japan
3   Faculty of Nutritional Sciences, Nakamura Gakuen University, Fukuoka, Japan
,
K. Morimura
2   Faculty of Health and Sports Science, Fukuoka University, Fukuoka, Japan
,
H. Tanaka
2   Faculty of Health and Sports Science, Fukuoka University, Fukuoka, Japan
› Author Affiliations
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Publication History



accepted after revision 18 February 2015

Publication Date:
30 September 2015 (online)

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Abstract

The purpose of the present investigation was to examine the effects of an exercise-based intervention on the daily physical activity (PA) above the lactate threshold under free-living conditions. A total of 81 middle-aged to older males (51±7 years) were randomly assigned into one of 2 groups. The subjects’ body weight, visceral fat area, lactate threshold (LT), and PA levels were measured before and after the 8-week lifestyle intervention. The PA levels were assessed using a pedometer with a uni-axial accelerometer (Lifecorder, Kenz, Nagoya). During the intervention, 300 min/week of exercise at LT was targeted in the exercise group. The LT was determined by the log-log transformation method. The subjects in the control group were instructed to maintain their usual lifestyles. In the exercise group, the body weight, visceral fat area and LT significantly improved after the intervention. In contrast, the duration of PA at an intensity of LT, >3 METs and >6 METs did not differ significantly. The present investigation did not find significant changes in the PA at LT under free-living conditions as a result of an 8-week exercise-based intervention, although the participants successfully improved their aerobic capacity and body composition.

Key words

exercise prescription - lifestyle - adherence
 

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