| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 103 === Purpose: to investigate the effects of changes in physical activity on physical fitness and metabolic syndrome (MS) risk factors in middle-aged men. Methods: 124 (aged about 40 to 64 years of age) dealt with health check in the northern part of a health examination hospital for the study. According to the change of physical activity, participants were assigned into physical activity increase group (IG, n=62) and physical activity no increase group (NIG, n=10). Physical activity and MS risk factors were measured. Data were analyzed by a mixed design two-way ANOVA. Results: (1) Physical activity amount of IG was significantly lower than NIG (p< .05) at first test, while physical activity amount of IG was significantly higher than NIG (p< .05) at second test. (2) Changes in physical activity on the physical fitness without causing significant changes (p> .05), but the percentage of body fat and the mass of body fat test were significantly higher at the second than at the first test of all subjects (p< .05). (3) MS prevalence of different groups did not differ significantly (p> .05), but the prevalence of MS were significantly lower at the second test than at the first test for all subjects (p< .05). (4) Changes in physical activity for MS risk factors caused no significant change (p> .05), but TG and HDL were significantly lower at the second test than at the first test of all subjects (p< .05). Conclusions: Although the changes in physical activity can’t cause significant positive change on physical fitness and MS risk factors in middle-aged men, but the lower physical activity life style can effectively reduce the prevalence of MS. Therefore, in order to maintain well health, middle-aged men should remain engaged in moderate exercise.
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