| Summary: | 碩士 === 國立嘉義大學 === 體育與健康休閒研究所 === 100 === Background: Muscle functional and physiological decrease with aging, and reduce the ability of the daily activities, increase the risk of falling. Strength training has been considered to be efficiently reduced one of the risks in the aging. Purpose: The purpose of this study was to compare the changes in lower limb muscle function and functional fitness in response to progressive eccentric- and concentric-only training in old men. Methods: Twenty-four old men were recruited in the study, and then were randomly assigned into progressive eccentric- (ET, n=8) and concentric-only groups (CT, n=8), or a control group (CON, n=8). The subjects in the ET and CT groups were completed a 12-week training program using a leg extension machine. Maximal voluntary isokinetic contraction at 30°/s and 210°/s (MVC-30 & MVC-210), rate of velocity development at 30°/s and 210°/s (RVD-30 & RVD-210), 8 feet up and go, 30s chair stand up, and 6-min go were measured before, and after 12-week training. Data were analyzed by a two-way mixed design of analysis of variance. Results: After 12 weeks progressive strength training, there were significantly greater improvement in the performance of MVC, RVD, 8 feet up and go, and 30s chair stand up in the ET and CT groups (p<.05), without significant difference in all measures between the ET and CT groups was observed. Compared to baseline, there was not a significant changes in all measures after 12-week of observation for the CON group. Conclusion: The results of this study showed that ET and CON progressive strength training in old men could be effectively produced the same extent of improvements of MVC, RVD, and functional physical fitness. Furthermore, muscle soreness was not induce during the 12-week of ET regardless of progressive increased in training intensity. Therefore, progressive ET can be used one of effective and safe training programmes for old indiduals or the results of this study can be provided as the reference for old individuals when they persuit to promote their healthy or anti-aging.
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