Hruda Kim V, Hicks Audrey L, McCartney Neil
Trillium Health Ctr, Etobicoke, ON, M9C 1A5.
Can J Appl Physiol. 2003 Apr;28(2):178-89. doi: 10.1139/h03-014.
The purpose of this study was to determine the influence of simple, progressive lower body exercise training, focusing on strength and power, on functional abilities in frail older adults. Twenty-five residents of a long-term care facility (75-94 yrs) participated in this randomized controlled trial of 10-wks duration. The exercise group (Ex, n = 18) underwent simple, progressive lower body resistance exercises, specifically aimed at improving muscle power, 3 times/wk; the control subjects (Con, n = 7) maintained their usual daily activities. Knee extensor strength and power were measured on an isokinetic dynamometer (180 degrees/s), and functional performance was assessed from a 6-m walk timed test, a 30-s chair stand, and an 8-ft up-and-go timed test, before and after the 10-wk intervention period. Significant increases were found in the Ex group for eccentric (44%) and concentric (60%) average power (p < 0.05), and improvements were seen on each functional test: the 8-foot up-and-go, chair stand, and walk time improved by 31%, 66%, and 33%, respectively (p < 0.05). No significant change occurred in the Con group. In conclusion, simple progressive exercise training, even in the 10th decade, increases muscle power and is associated with an improved performance of functional activities using the trained muscles.
本研究的目的是确定以力量和爆发力为重点的简单、渐进式下肢运动训练对体弱老年人功能能力的影响。一家长期护理机构的25名居民（75 - 94岁）参与了这项为期10周的随机对照试验。运动组（Ex，n = 18）每周进行3次简单、渐进式下肢阻力运动，特别旨在提高肌肉力量；对照组（Con，n = 7）维持其日常活动。在10周干预期前后，使用等速测力计（180度/秒）测量膝关节伸肌力量和爆发力，并通过6米步行定时测试、30秒椅子站立测试和8英尺起身行走定时测试评估功能表现。运动组的离心（44%）和向心（60%）平均力量显著增加（p < 0.05），并且在各项功能测试中均有改善：8英尺起身行走、椅子站立和步行时间分别改善了31%、66%和33%（p < 0.05）。对照组未发生显著变化。总之，即使在老年期进行简单的渐进式运动训练，也能增加肌肉力量，并与使用训练肌肉的功能活动表现改善相关。
