Effects of voluntary exercise on physical fitness and lifestyle activity

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The purpose of this study was to investigate the effects of voluntary exercise (walking) on physical fitness and lifestyle activity. The subjects were recruited from the community around the university, and volunteered to eight weeks intervention. The intervention groups were class-walking group (A : n=32) , voluntary walking group (B : n=34) , blood-pressure monitor group (C : n=22) , and activity monitor group (D : n=48) . Although there was no significant difference among groups in the daily activity before the intervention, there were significant difference between any groups except C and D during intervention. As for A group, the intended steps due to group walking (9025±584 steps) enhanced the daily activity in the class-walking day (16191±3988 steps) comparig with that except in the class-walking day (11719±3454 steps) , but also signigicantly attenuated the voluntary steps in the class-walking day (7166±3892 steps) , which was not significantly different from base line of the daily activity. There were significant enhancement of daily activity at 4 months after the intervention for A (11487±4057) and B (9564±2545) , but not for C (9070±3485) comparing with base-line daily activity. One year follow-up data also showed similar results. These data suggests that the instruction and the intended steps including the class-walking enhance the daily activity, and that the voluntary steps would play more important role for maintaining the lifestyle activity after the intervention.