年龄对动态负重任务期间神经肌肉控制的影响。
Influence of age on neuromuscular control during a dynamic weight-bearing task.
作者信息
Madhavan Sangeetha, Burkart Sarah, Baggett Gail, Nelson Katie, Teckenburg Trina, Zwanziger Mike, Shields Richard K
机构信息
Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, IL, USA.
出版信息
J Aging Phys Act. 2009 Jul;17(3):327-43. doi: 10.1123/japa.17.3.327.
Neuromuscular control strategies might change with age and predispose the elderly to knee-joint injury. The purposes of this study were to determine whether long latency responses (LLRs), muscle-activation patterns, and movement accuracy differ between the young and elderly during a novel single-limb-squat (SLS) task. Ten young and 10 elderly participants performed a series of resistive SLSs (approximately 0-30 degrees) while matching a computer-generated sinusoidal target. The SLS device provided a 16% body-weight resistance to knee movement. Both young and elderly showed significant overshoot error when the knee was perturbed (p < .05). Accuracy ofthe tracking taskwas similar between the young and elderly (p = .34), but the elderly required more muscle activity than the younger participants (p < .05). The elderly group had larger LLRs than the younger group (p < .05). These results support the hypothesis that neuromuscular control of the knee changes with age and might contribute to injury.
神经肌肉控制策略可能会随着年龄的增长而改变，并使老年人更容易发生膝关节损伤。本研究的目的是确定在一项新型单腿深蹲（SLS）任务中，年轻人和老年人之间的长潜伏期反应（LLR）、肌肉激活模式和运动准确性是否存在差异。10名年轻参与者和10名老年参与者在匹配计算机生成的正弦目标时，进行了一系列阻力单腿深蹲（约0-30度）。SLS装置为膝关节运动提供16%体重的阻力。当膝关节受到干扰时，年轻人和老年人均表现出显著的过冲误差（p < 0.05）。年轻人和老年人在跟踪任务中的准确性相似（p = 0.34），但老年人比年轻参与者需要更多的肌肉活动（p < 0.05）。老年组的长潜伏期反应比年轻组更大（p < 0.05）。这些结果支持了膝关节神经肌肉控制随年龄变化并可能导致损伤的假设。
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