Johnson Marjorie E, Mille Marie-Laure, Martinez Kathy M, Crombie Gwen, Rogers Mark W
Department of Physical Therapy and Human Movement Sciences, Northwestern University, Chicago, IL, USA.
Arch Phys Med Rehabil. 2004 Apr;85(4):593-7. doi: 10.1016/j.apmr.2003.07.022.
To test the hypothesis that older age significantly affects hip abduction and adduction joint torque-time generating capability in women.
Cross-sectional study, wherein subjects were tested in a supported standing position.
University human performance laboratory.
Seventy-six healthy, adult women (38 young; 38 old).
Not applicable.
The dependent variables were peak isometric torque and its corresponding torque rate and average peak isokinetic torque. Age group differences were assessed by analysis of variance.
Isometric peak torques were significantly lower in older women (P</=.001) for hip abduction (34%) and adduction (24%). Decreases with age were also significant for isometric rates of torque for both muscle groups (P</=.001). Average isokinetic peak torque of hip abduction and adduction showed even greater declines in older women versus the young (P</=.001) with losses of 44% and 56%, respectively.
The hip abductor and adductor torques showed relatively marked age-related changes. To enhance balance assessment and treatment, and to reduce the risk of falls and related injuries in older women, greater focus should be placed on understanding the role of joint torque-time changes on frontal plane balance control.
验证年龄较大对女性髋关节外展和内收关节扭矩-时间产生能力有显著影响这一假设。
横断面研究，受试者在支撑站立位接受测试。
大学人体运动实验室。
76名健康成年女性（38名年轻女性；38名老年女性）。
不适用。
因变量为等长峰值扭矩及其相应的扭矩速率以及平均峰值等速扭矩。通过方差分析评估年龄组差异。
老年女性髋关节外展（34%）和内收（24%）的等长峰值扭矩显著较低（P≤0.001）。两组肌肉的等长扭矩速率随年龄增长也显著下降（P≤0.001）。老年女性髋关节外展和内收的平均等速峰值扭矩相较于年轻女性下降更为明显（P≤0.001），分别下降了44%和56%。
髋关节外展肌和内收肌扭矩显示出相对明显的年龄相关变化。为加强平衡评估和治疗，并降低老年女性跌倒及相关损伤的风险，应更加注重了解关节扭矩-时间变化在额面平衡控制中的作用。
