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首页> 外文期刊>Journal of athletic training >Localized Ankle Fatigue Development and Fatigue Perception in Adults With or Without Chronic Ankle Instability
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Localized Ankle Fatigue Development and Fatigue Perception in Adults With or Without Chronic Ankle Instability

机译：局部踝关节疲劳发育和成人疲劳感知或没有慢性踝关节不稳定

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Context: Fatigue could contribute to ankle-sprain injuries during sport, particularly for individuals with chronic ankle instability (CAI). Objective: To examine whether adults with or without CAI develop fatigue at similar rates when performing ankle exercises at the same relative effort level and whether these groups differ in their subjective perceptions of fatigue. Design: Controlled laboratory study. Setting: Biomechanics research laboratory. Patients or Other Participants: A total of 11 volunteers with CAI (1 man, 10 women; age = 23.5 ± 3.0 years, height = 168.0 ± 11.2 cm, mass = 64.3 ± 13.5 kg) were recruited for the unstable-ankle group, and 11 volunteers matched for age, height, mass, and sex (1 man, 10 women; age = 24.1 ± 2.1 years, height = 169.5 ± 9.7 cm, mass = 62.3 ± 9.7 kg) were recruited as control participants. Intervention(s): Localized muscle fatigue (LMF) was induced in the ankle of the dominant limb using a custom fatigue protocol. Plantar-flexion and dorsiflexion exertions were completed at a rate of 12 cycles per minute at isotonic loads equal to 70% and 30%, respectively, of individual maximal voluntary isometric strength. Intermittent measures of maximal voluntary isometric strength and ratings of perceived exertion (RPEs) were obtained. Main Outcome Measure(s): We compared isometric-strength measures and RPE scores at each observation time (prefatigue and at 4, 8, 12, and 16 minutes into the fatigue protocol) and the group correlations between changes in strength and changes in RPE scores. Results: Based on ankle-strength measures, the 2 test groups developed LMF at similar rates when exercising at equivalent levels of relative effort. The 2 groups also reported similar levels of discomfort as fatigue progressed. Conclusions: The rate of LMF development at the ankle and the associated perception of fatigue did not differ between adults with or without CAI.
机译：背景：疲劳可能有助于运动期间的踝关节扭伤，特别是对于具有慢性踝关节不稳定（CAI）的个体。目的：检查有或没有CAI的成年人在相同的相对努力水平的踝关节练习时以类似的速度发展疲劳，以及这些群体是否对其对疲劳的主观看法不同。设计：受控实验室研究。环境：生物力学研究实验室。患者或其他参与者：共有11名与CAI志愿者（1人，10名女性;年龄= 23.5±3.0厘米，为不稳定脚踝组招募= 64.3±13.5克）， 11名志愿者符合年龄，身高，质量和性别（1人，10名女性;年龄= 24.1±2.1岁，招募为控制参与者募集= 62.3±9.7千克）。干预：使用定制疲劳方案在主导肢体的脚踝中诱导局部肌肉疲劳（LMF）。 Purtorar-屈曲和背离的耗尽以120％和30％，分别为单位最大自愿等距强度，以每分钟12个循环的速度完成。获得了最大自愿等距强度和感知劳累（RPE）的最大自愿等距强度和评级的间歇性措施。主要结果措施：我们比较了每个观察时间（预提到和4,8,12和16分钟进入疲劳方案的等距强度测量和RPE分数，并且在RPE的强度变化与变化之间的群体相关性得分。结果：根据踝关节强度措施，在相当水平的相对努力中锻炼时，2个测试组在类似的速率下开发了LMF。 2组还报告了与疲劳进展相似的不适水平。结论：踝关节的LMF发育率和相关的疲劳感染的速度没有差异，有或没有CAI的成年人不同。

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