Knee strength capabilities and slip severity.
Knee strength capabilities and slip severity.
复制标题
膝盖力量能力和滑倒严重程度。
DOI：
10.1123/jab.25.2.140
复制
发表时间：
2009
影响因子：
1.4
通讯作者：
Cham,Rakie
中科院分区：
文献类型：
--
作者：
Wyszomierski,SarahA;Chambers,AprilJ;Cham,Rakie
滑倒和跌倒是老年人群中一个严重的公共卫生问题。肌肉力量下降与年龄增加和跌倒发生率增加有关。了解特定关节肌肉力量特征与滑倒倾向之间的关系对于识别导致滑倒引发跌倒的生物力学因素并改进滑倒/跌倒预防计划非常重要。滑动时产生的膝盖矫正力矩有助于平衡恢复。因此，本研究的目标是调查膝关节屈曲/伸展强度与滑倒严重程度之间的关系。对 29 名年轻健康受试者和 28 名老年健康受试者测量了滑腿的等长膝关节屈曲/伸展峰值扭矩和扭矩发展率 (RTD)。收集自定步速行走过程中意外滑倒的运动数据。滑动后跟的峰值滑动速度（PSV）作为滑动严重程度的衡量标准。将步态速度控制的 PSV 与滑腿强度相关的性别和年龄组内回归显示，仅在年轻男性中存在显着的反向 PSV-膝关节伸展峰值扭矩和 PSV-膝关节屈曲/伸展 RTD 关系。性别和年龄组之间 PSV 力量关系的差异可能是由于年轻男性的力量能力范围更大所致。总之，产生更高、更快速的膝关节屈曲/伸展肌肉力矩（更大的峰值扭矩/RTD）的能力可能有助于从严重滑倒中恢复。
Slips and falls are a serious public health concern in older populations. Reduced muscle strength is associated with increased age and fall incidence. Understanding the relationships between specific joint muscle strength characteristics and propensity to slip is important to identify biomechanical factors responsible for slip-initiated falls and to improve slip/fall prevention programs. Knee corrective moments generated during slipping assist in balance recovery. Therefore, the study goal was to investigate the relationship between knee flexion/extension strength and slip severity. Isometric knee flexion/extension peak torque and rate of torque development (RTD) of the slipping leg were measured in 29 young and 28 older healthy subjects. Motion data were collected for an unexpected slip during self-paced walking. Peak slip velocity (PSV) of the slipping heel served as a slip severity measure. Within-sex and age group regressions relating gait speed-controlled PSV to strength of the slipping leg revealed significant inverse PSV-knee extension peak torque and PSV-knee flexion/extension RTD relationships in young males only. Differences in PSV-strength relationships between sex and age groups may be caused by greater ranges of strength capabilities in young males. In conclusion, the ability to generate higher, more rapid knee flexion/extension muscle moments (greater peak torque/RTD) may assist in recovery from severe slips.