| Summary: | 碩士 === 國立成功大學 === 體育健康與休閒研究所 === 101 === Purpose: The purpose of this study is to examine the effects in isokinetic strength and body composition after 24 weeks of training with the same volume but different intensities in resietance or multicomponent training in middle-aged and elder adults.
Methods: There were 53 healthy volunteers aged 51-70 assigned to 4 groups (control group, n=13; moderate-intensity resistance group, n=14; high- intensity resistance group, n=13; multicomponent exercise group, n=13). The training program consisted of gradual increase following the different exercise programs for 2 sessions per week. The measurement for bone mineral density and isokinetic strength was performed by dual-energy X-ray absorptiometry and Biodex System 4 PRO.
Results: The control group (-0.85%) showed decrease in bone mineral density. The high- intensity resistance group (+0.8%) showed significantly higher in bone mineral density than control and moderate-intensity resistance group (p 〈 .05). Besides, the exercise group (+1.7~2.8%) improved in arm lean mass more than control group (-0.7~1.3%) (p 〈 .05). The moderate and high intensity resistance groups demonstrated significant improvements in triceps peak torque (+15.5~26.1%). Although exercise groups all increased in peak torque of quadriceps (+7~15.6%) and hamstring (+43.4~56.9%), only hamstring was significantly greater in moderate-intensity resistance group than control groups (p 〈 .05). The exercise groups (+11.5% ~ 15.8%) showed significantly higher in cardiopulmonary fitness than control group after 24 weeks of training (p 〈.05).
Conclusion: This study has shown that high-intensity resistance training program has beneficial effects on bone mineral density. Furthermore, it had also shown the similar responses and effects of lean body mass, isokinetic strength and cardiopulmonary fitness between exercise groups.
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