Abstract
<h2>Abstract</h2> Lan C, Lai J-S, Chen S-Y, Wong M-K. Tai chi chuan to improve muscular strength and endurance in elderly individuals: a pilot study. Arch Phys Med Rehabil 2000;81:604-7. <b>Objective:</b> To evaluate the training effect of a Tai Chi Chuan (TCC) program on knee extensor muscular strength and endurance in elderly individuals. <b>Design:</b> Before-after trial. <b>Setting:</b> Community setting. <b>Participants:</b> Forty-one community dwelling subjects aged 61.1 ± 9.8 years undertook a TCC program. Nine dropped out during the study. Pretraining and posttraining measurements were obtained from 15 men and 17 women. <b>Intervention:</b> Subjects participated in a 6-month TCC program. Each session consisted of 20 minutes of warm-up, 24 minutes of structured TCC training, and 10 minutes of cool-down exercises. <b>Main Outcome Measures:</b> Peak torque of dominant and nondominant knee extensors was tested at speeds of 60°, 180°, and 240°/sec concentrically and eccentrically. Muscular endurance of the knee extensor was tested at the speed of 180°/sec. <b>Results:</b> In the group of men, concentric knee extensor peak torque increased by 15.1% to 20.0% and eccentric peak torque increased by 15.1% to 23.7%. The group of women also showed increases, ranging from 13.5% to 21.8% in concentric peak torque, and 18.3% to 23.8% in eccentric peak torque. In addition, the knee extensor endurance ratio increased by 9.6% to 18.8% in the men and 10.1% to 14.6% in the women. <b>Conclusion:</b> TCC training may enhance muscular strength and endurance of knee extensors in elderly individuals. <i>© 2000 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation</i>
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