Effects of local and widespread muscle fatigue on movement timing.
Effects of local and widespread muscle fatigue on movement timing.
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DOI：
10.1007/s00221-014-4020-z
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发表时间：
2014-12
影响因子：
2
通讯作者：
Gates, Deanna H.
中科院分区：
文献类型：
--
作者：
Cowley, Jeffrey C.;Dingwell, Jonathan B.;Gates, Deanna H.
重复的运动会导致肌肉疲劳，导致运动重组、表现缺陷和/或可能的损伤。然而，疲劳的影响可能取决于所采用的疲劳任务的类型。这项研究的目的是确定特定肌肉组的局部疲劳与不同肌肉组的广泛疲劳如何影响运动时机的控制。20名健康受试者在完成使任务中使用的所有肌肉疲劳的方案(广泛性疲劳)或选择性地使用于执行锯切任务的推进行程的初级肌肉疲劳的方案(局部疲劳)之前和之后，执行类似于锯切的连续5分钟的上肢低负荷工作任务。受试者被指示用节拍器对他们的动作计时。计算每个动作的计时误差、移动距离和速度。然后使用目标等价流形(GEM)方法对数据进行分析，以量化目标相关和非目标相关变异性的变化。我们将去势波动分析应用于每个时间序列，以量化反映所用控制策略变化的波动动态变化。在局部性疲劳之后，受试者做出更短、更慢的运动，并对与目标无关的变异性施加更大的控制。在广泛的疲劳后，受试者对与目标无关的变异性的控制较少，也没有改变运动模式。因此，局部和广泛的肌肉疲劳对运动的影响是不同的。局部疲劳可能会减少可用的运动解决方案，因此比广泛的肌肉疲劳导致更大的运动重组。受试者改变了他们的控制策略，但在两个疲劳任务后继续实现计时目标。
Repetitive movements can cause muscle fatigue, leading to motor reorganization, performance deficits, and/or possible injury. The effects of fatigue may depend on the type of fatigue task employed, however. The purpose of this study was to determine how local fatigue of a specific muscle group versus widespread fatigue of various muscle groups affected the control of movement timing. Twenty healthy subjects performed an upper-extremity low-load work task similar to sawing for 5 continuous minutes both before and after completing a protocol that either fatigued all the muscles used in the task (widespread fatigue) or a protocol that selectively fatigued the primary muscles used to execute the pushing stroke of the sawing task (localized fatigue). Subjects were instructed to time their movements with a metronome. Timing error, movement distance, and speed were calculated for each movement. Data were then analyzed using a goal-equivalent manifold (GEM) approach to quantify changes in goal-relevant and non-goal-relevant variability. We applied detrended fluctuation analysis to each time series to quantify changes in fluctuation dynamics that reflected changes in the control strategies used. After localized fatigue, subjects made shorter, slower movements and exerted greater control over non-goal-relevant variability. After widespread fatigue, subjects exerted less control over non-goal-relevant variability and did not change movement patterns. Thus, localized and widespread muscle fatigue affected movement differently. Local fatigue may reduce the available motor solutions and therefore cause greater movement reorganization than widespread muscle fatigue. Subjects altered their control strategies but continued to achieve the timing goal after both fatigue tasks.
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影响因子：
3.4
作者：
BIGLANDRITCHIE, B;WOODS, JJ
通讯作者：
WOODS, JJ
影响因子：
2.5
作者：
Dingwell, Jonathan B.;Smallwood, Rachel F.;Cusumano, Joseph P.
通讯作者：
Cusumano, Joseph P.
DOI：
10.1249/00005768-198205000-00012
发表时间：
1982-01-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
BORG, GAV
通讯作者：
BORG, GAV
影响因子：
2.4
作者：
Dingwell, Jonathan B.;Cusumano, Joseph P.
通讯作者：
Cusumano, Joseph P.
影响因子：
2.8
作者：
Alizadehkhaiyat, Omid;Fisher, Anthony C.;Frostick, Simon P.
通讯作者：
Frostick, Simon P.