Physical work capacity after 7 wk of wheelchair training: effect of intensity in able-bodied subjects.
Physical work capacity after 7 wk of wheelchair training: effect of intensity in able-bodied subjects.
复制标题
轮椅训练 7 周后的身体工作能力：强度对身体健全受试者的影响。
DOI：
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发表时间：
1999
影响因子：
4.1
通讯作者：
A. Hollander
中科院分区：
文献类型：
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作者：
L. V. D. van der Woude;J. J. van Croonenborg;I. Wolff;A. Dallmeijer;A. Hollander
目的
本研究的目的是研究为期 7 周的轮椅训练计划对身体健全受试者的体力工作能力的影响。研究了 50% 和 70% 心率储备 (HRR) 训练强度对不同受试者组的影响。
方法
二十七名身体健全的男性受试者参与了这项研究。他们被随机分为对照组（N = 8）、50%强度组（N = 9）和70%强度组（N = 10）。 50% 和 70% 强度组接受为期 7 周的轮椅训练计划：每周 3 次，在电动跑步机上进行半小时的轮椅锻炼，平均强度分别为 HRR 的 50% 和 70%。训练前后，在固定轮椅测力计上进行测试时，获得了体力工作能力参数（最大等长肌力 (Fiso)、冲刺功率 (P30)、最大功率输出 (POmax) 和峰值摄氧量 (VO2peak)）以及估计 POmax（ME20、ME40；HR20、HR40）20% 和 40% 时的次最大表现（机械效率，HR）。
结果
对受试者内因素“前后测试”、受试者间因素训练（50% 和 70% 训练与对照）以及交互项进行重复测量的双因素方差分析表明，与对照组相比，50% 强度组的 P30 和 POmax 显着增加。 70%强度组P30、POmax和VO2peak与对照组相比显着增加（P < 0.05）。与 50% 强度组相比，70% 强度组在训练过程中 P30 和 POmax 并未表现出显着更高的增加。未发现 Fiso 和次最大 PO 参数有显着影响。
结论
两种强度的轮椅训练都可以对身体健全的受试者的最大体力工作能力产生有利的影响，并且还可能对次最大功率输出时的机械效率产生有利的影响。有氧和无氧工作能力的参数都会产生影响。虽然 70% 强度的训练比 50% 强度更有效，但 50% HRR 的训练最初可能更适合未经训练的个人（例如刚开始康复的轮椅使用者），以防止疲劳并增强动力。
PURPOSE
The purpose of this study was to study the effects of a 7-wk wheelchair training program on physical work capacity in able-bodied subjects. Effects of training intensities of 50 and 70% heart rate (HR) reserve (HRR) were studied for different subject groups.
METHODS
Twenty-seven able-bodied male subjects participated in this study. They were randomly divided into a control group (N = 8), a 50%-intensity group (N = 9), and a 70%-intensity group (N = 10). The 50%- and the 70%-intensity groups received a 7-wk wheelchair training program: three times a week, one-half hour wheelchair exercise on a motor driven treadmill at an average intensity of 50 and 70% of the HRR, respectively. Before and after the training period, parameters for physical work capacity (maximal isometric strength (Fiso), sprint power (P30), maximal power output (POmax) and peak oxygen uptake (VO2peak)), and submaximal performance (mechanical efficiency, HR) at 20 and 40% of the estimated POmax (ME20, ME40; HR20, HR40) were obtained during tests on a stationary wheelchair ergometer.
RESULTS
A two-factor ANOVA for repeated measures on the within-subjects factor "pre-post tests," the between-subject factor training (50% and 70% training vs control) and the interaction term showed that the 50%-intensity group significantly increased on P30 and POmax compared with the control group. The 70% intensity group significantly increased on P30, POmax and VO2peak compared with the control group (P < 0.05). The 70% group did not show significantly higher increases in P30 and POmax over training than the 50% intensity. No significant effects were found for the Fiso and the parameters at submaximal PO.
CONCLUSIONS
The wheelchair training at both intensities can have favorable effects on maximal physical work capacity in able-bodied subjects, and possibly also on mechanical efficiency at submaximal power output. Effects are seen in parameters for both aerobic and anaerobic work capacities. Although training at 70% intensity was more effective than the 50% intensity, training at 50% HRR may initially be more appropriate in untrained individuals, such as novice wheelchair users at the start of their rehabilitation, to prevent fatigue and enhance motivation.