老年人实验室模拟系绳释放前向坠落止停中上肢关节力矩和力量的年龄差异。
Age differences in upper extremity joint moments and strength during a laboratory-based tether-release forward fall arrest in older women.
机构信息
College of Kinesiology, University of Saskatchewan, Canada; St Mary's University, Waldegrave Road, Twickenham, TW1 4SX, London, UK; Biomechanics of Balance and Movement Laboratory, College of Kinesiology, University of Saskatchewan, Canada.
College of Kinesiology, University of Saskatchewan, Canada; School of Rehabilitation Science, University of Saskatchewan, Canada; Biomechanics of Balance and Movement Laboratory, College of Kinesiology, University of Saskatchewan, Canada.
出版信息
J Biomech. 2022 Jun;138:111107. doi: 10.1016/j.jbiomech.2022.111107. Epub 2022 Apr 29.
Age-related declines in upper extremity muscle strength may affect an older adult's ability to land and control a simulated forward fall impact. The role of individual upper extremity joints during a forward fall impact has not been examined. The purpose was to evaluate the age differences in upper extremity joint moment contributions during a simulated forward fall and upper extremity muscle strength in older women. A convenience sample of 68 older women (70 (8) yrs) performed three trials of a simulated forward fall. Percentage joint moments of the upper extremity were recorded. Upper extremity muscle strength was collected via handgrip, hand-held dynamometry of the shoulder and elbow and a custom multi-joint concentric and eccentric strength isokinetic dynamometer protocol. Percentage joint moment contributions differed between women in their sixties and seventies with significantly greater relative shoulder joint involvement (P =.008), coupled with lower elbow joint contributions (P =.004) in comparison to 80 year olds. An increase in each year of age was associated with a 4% increase in elbow contribution (Beta = -0.421, r = 17.9, P = 0.0001) and a 3.7% decrease in shoulder contribution (Beta = 0.373, r = 14.6, P = 0.002). Older women exhibit different landing strategies as they age. Fall injury prevention research should consider interventions focused on these differences taking into account the contributions of upper extremity strength.
随着年龄的增长，上肢肌肉力量的下降可能会影响老年人落地和控制模拟前向摔倒冲击的能力。个体上肢关节在向前摔倒冲击中的作用尚未被研究过。本研究旨在评估老年女性在上肢肌肉力量方面，在上肢关节在模拟前向摔倒时的关节力矩贡献方面的年龄差异。本研究采用方便抽样的方法，对 68 名老年女性（70（8）岁）进行了三次模拟前向摔倒试验。记录上肢关节的百分比关节力矩。上肢肌肉力量通过握力、肩部和肘部手持测力计以及定制的多关节向心和离心等速力量测力计协议进行收集。结果显示，与 80 岁的女性相比，60 多岁和 70 多岁的女性上肢关节的百分比关节力矩贡献不同，肩部关节的相对参与度显著增加（P =.008），而肘部关节的参与度降低（P =.004）。与每年年龄增加相关的是，肘部贡献增加 4%（Beta = -0.421，r = 17.9，P = 0.0001），肩部贡献减少 3.7%（Beta = 0.373，r = 14.6，P = 0.002）。随着年龄的增长，老年女性表现出不同的落地策略。跌倒伤害预防研究应考虑针对这些差异的干预措施，同时考虑上肢力量的贡献。
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