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(Effect of an exercise prescription of intensive strength training on physical function in aged males) [Chinese - simplified characters]
Li Z-G
Zhongguo Zuzhi Gongcheng yu Linchuang Kangfu [Journal of Clinical Rehabilitative Tissue Engineering Research] 2009 May 14;13(20):3966-3971
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

BACKGROUND: The strength training is avoidant question in physical exercise in aged people, however, some researchers thought that long-term strength training can reduce cholesterol, decrease blood pressure, diminish the rate of coronary atherosclerotic heart disease, and strengthen the balance ability of aged people. OBJECTIVE: To discuss whether strength trainings are fit for aged people, in addition, to verify if adding strength intensive strength training could have benign stimulation to aged males. DESIGN, TIME AND SETTING: A randomly control experiment was performed at the Guangzhou Sports University between June 2006 and January 2007. PARTICIPANTS: Totally 120 healthy elderly males volunteers were randomly divided into normal control, general exercise, and strength training groups, with 40 people in each group. METHODS: In the normal control group, there were no changes of living habits. Aged people in the general exercise group participated in alternating aerobic and anaerobic exercises; people in the strength training group underwent an intensive strength training based on the general exercise prescription. MAIN OUTCOME MEASURES: The related function indexes of all tests objective were examined prior to and 1, 7 months after experiment. RESULTS: After exercise, the resting pulse came down appropriately, and the systolic and diastolic blood was decreased in the general exercise and strength training group (p < 0.05); the difference of vital capacity (VC) was not significantly (p > 0.05). However, after experiment, the time pulmonary vital capacity (TFVC) of the strength training group was significantly increased (p < 0.01), the exercises loading test index of exercise load was obviously decreased at 1 month after experiment (p < 0.05), which was continued decreased after 7 month, but in the normal control group was fundamentally recovered to the original level (p < 0.05). CONCLUSION: After intensive strength training, the cardiac contraction of the aged males is increased, the elasticity of blood vessel is enhanced, which can effectively improve the circulation state of respiratory system, decrease the pulmonary residual volume, elevate the oxygen utilization ratio, and enhance recovery ability after the exercises loading.

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