Age and gender differences in peak lower extremity joint torques and ranges of motion used during single-step balance recovery from a forward fall
Age and gender differences in peak lower extremity joint torques and ranges of motion used during single-step balance recovery from a forward fall
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DOI：
10.1016/s0021-9290(00)00152-4
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发表时间：
2001-01-01
影响因子：
2.4
通讯作者：
Alexander, NB
中科院分区：
文献类型：
--
作者：
Wojcik, LA;Thelen, DG;Alexander, NB
以前的研究发现，健康成年人在向前跌倒后通过一步恢复平衡的能力存在很大的年龄和性别差异。假设下肢关节强度和活动度（ROM）的差异可能导致了这些观察到的差异。因此，运动学和测力板数据与刚性连接的生物力学模型模拟步进腿动力学检查关节扭矩和ROM使用的科目在成功的单步平衡恢复后，从前倾释放。将研究中受试者使用的峰值ROM和扭矩与已发表的估计值或可用最大值的测量值进行比较。对于任何给定的初始倾斜角度，受试者使用的平均ROM没有显著的年龄或性别组差异。随着初始倾斜角度的增加，在成功的恢复中使用了更大的膝关节ROM和更大的髋关节ROM。在成功恢复中使用的下肢关节扭矩峰值存在显著的性别差异和一些年龄组差异。年轻和年长的女性经常使用接近最大的关节扭矩来恢复平衡。受试者在跖屈和髋屈时的最大关节力量并不能很好地预测单步平衡恢复能力，尤其是在女性受试者中。(C)2000爱思唯尔科技有限公司版权所有。
Previous studies have found substantial age and gender group differences in the ability of healthy adults to regain balance with a single step after a Forward fall. It was hypothesized that differences in lower extremity joint strengths and ranges of motion (ROM) may have contributed to these observed differences. Kinematic and forceplate data were therefore used with a rigid-link biomechanical model simulating stepped leg dynamics to examine the joint torques and ROM used by subjects during successful single-step balance recoveries after release from a Forward lean. The peak ROM and torques used by subjects in the study were compared to published estimates or measured values of the available maxima. No significant age or gender group differences were found in the mean ROM used by the subjects for any given initial lean angle. As initial lean angle increased, larger knee ROM and significantly larger hip ROM were used in the successful recoveries. There were substantial gender differences and some age group differences in peak lower extremity joint torques used in successful recoveries. Both young and older females often used nearly maximal joint torques to recover balance. Subjects' maximum joint strengths in plantarflexion and hip flexion were not good predictors of single-step balance recovery ability, particularly among the female subjects. (C) 2000 Elsevier Science Ltd. All rights reserved.