持续的,低强度和高强度的同度任务对表现疲劳性的影响以及导致任务终止的感知反应
Robert W Smith1, Dolores G Ortega2, Jocelyn E Arnett2
1Department of Nutrition and Health Sciences, University of NE - Lincoln, Lincoln, NE, 68510, USA. bsmith80@huskers.unl.edu.
European journal of applied physiology
|January 2, 2024
概括
与高强度相比,在低强度下持续的同度前臂任务延长了任务失败的时间. 任务失败似乎是由心理因素驱动的,而不是绝对的力量损失.
科学领域:
- 运动生理学 运动生理学
- 人类表现的人类表现.
背景情况:
- 了解影响任务失败的因素对于优化培训和绩效至关重要.
- 同度收缩是各种体力活动和康复环境中的基本运动.
研究的目的:
- 调查持续的同位数低强度与高强度前臂任务对任务失败时间 (TTF) 的影响.
- 分析表现疲劳 (PF),感知劳动力 (RPE) 的评级,以及任务终止的心理决定因素.
主要方法:
- 十个健康的男性在两个目标RPE水平 (2和8) 上执行了疲劳的同度前臂曲任务.
- 在疲劳前和疲劳后测量了最大自愿异位收缩 (MVICs).
- 测试后问卷 (PTQ) 评估了任务终止的感知原因,包括身体感觉和心理因素.
主要成果:
- 与高强度任务 (TRQ8FT) 相比,低强度 (TRQ2FT) 任务 (245.0s) 的任务失败时间 (TTF) 显著更长 (36.8s).
- 尽管任务失败了,但参与者可以产生比任务的目标扭矩大100-300%的MVIC扭矩.
- 任务失败时的RPE在条件之间是相似的,这表明主观的限制而不是绝对的生理限制.
结论:
- 在持续的同度收缩中,任务失败可能更多地受到心理因素 (不愿继续) 的影响,而不是无法产生所需的力.
- 这些发现表明,感知到的努力和心理动力在决定任务终止方面发挥着重要作用,即使意志能力仍然很高.
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