Effects of isokinetic ankle fatigue on the maintenance of balance and postural limits
Effects of isokinetic ankle fatigue on the maintenance of balance and postural limits
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DOI：
10.1053/apmr.2002.28032
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发表时间：
2002-02-01
影响因子：
4.3
通讯作者：
McGregor, SJ
中科院分区：
文献类型：
--
作者：
Yaggie, JA;McGregor, SJ
目的：量化等速疲劳后踝关节平衡参数和姿势控制范围的变化。设计：前后试验，采用5×6重复测量设计。地点：一般人群。参与者：24名男性，年龄24.9±3.92岁，身高177.79±6.36 cm；体重80.78±13.22 kg，2年内无踝关节损伤。干预：由等速收缩引起的足屈和背屈疲劳。在疲劳前即刻、疲劳后0分钟、10分钟、20分钟和30分钟在测力台上进行单侧测试(S安静站位15次，S倾斜测试10次)进行平衡评定。主要观察指标：内侧(ML)和前后(FA)摆动以及ML和FA位移的方差分析和重复时间测量(α=0.05)。结果：安静站立时，TO时ML摆动较大，而总摆动在疲劳后各时间点均增加(P<；05)。对于精益测试，在T0和T10，FA摇摆增加，总摇摆在所有时间点都增加(P<；0.05)。ML和FA的位移在TO(P<；0.05)上均有显著差异。所有摆动参数在20分钟内恢复到基线水平。结论：踝屈肌和背屈肌的等速疲劳对摆动参数和姿势控制范围有显著影响。这些扰动是暂时的，恢复发生在20分钟内。
Objective: To quantify changes in balance parameters and ranges of postural control at the ankle after isokinetic fatigue.Design: Before-after trials, with a 5 X 6 repeated-measures design.Setting: General community.Participants: Twenty-four men (age, 24.9 +/- 3.92y, height, 177.79 +/- 6.36cm; weight, 80.78 +/- 13.22kg) without ankle trauma within 2 years.Interventions: Fatigue of the plantarflexors and dorsiflexors was induced by isokinetic contractions. Balance was assessed by using a unilateral test (15-s quiet stance, 10-s lean test) on a force platform immediately before and at 0 (TO), 10 (T10), 20 (T20), and 30 (T30) minutes postfatigue.Main Outcome Measure: Mediolateral (ML) and fore-aft (FA) sway as well as ML and FA displacement were analyzed by analysis of variance with repeated measures for time (alpha = .05).Results: In quiet stance, ML sway was greater at TO, whereas total sway increased at all time points postfatigue (P < .05). For the lean test, FA sway increased at TO and T 10, and total sway increased at all time points (P < .05). Both ML and FA displacement significantly differed at TO (P < .05). All sway parameters returned to baseline within 20 minutes.Conclusions: Isokinetic fatigue of ankle plantarflexors and dorsiflexors significantly influences sway parameters and ranges of postural control in healthy young men. These perturbations are transient, and recovery occurs within 20 minutes.