最大髋关节力量和运动速度的年龄相关变化。
Age-related changes in maximal hip strength and movement speed.
作者信息
Dean Jesse C, Kuo Arthur D, Alexander Neil B
机构信息
Department of Biomedical Engineering, The University of Michigan, Ann Arbor 48109-2125, USA.
出版信息
J Gerontol A Biol Sci Med Sci. 2004 Mar;59(3):286-92. doi: 10.1093/gerona/59.3.m286.
BACKGROUND
We quantified age-related decreases in the ability of female participants to generate whole leg movements about the hip.
METHODS
We measured maximum hip strength and hip velocity in 12 young and 12 older healthy women. Both capabilities could help fall prevention by contributing to fast leg movements. We also measured maximum velocities as a function of isotonic load.
RESULTS
Young participants produced 107.6 +/- 25.4 N-m (mean +/- SD) isometric torque in flexion and 109.3 +/- 22.3 N-m in extension. Older participants produced 22% and 31% lower torques, respectively (p<.001). Young participants generated maximum velocities of 362.8 +/- 51.5 degrees/s in flexion and 371.5 +/- 54.2 degrees/s in extension. Older participants produced 16% lower velocities in both directions (p<.001). Older participants also produced lower velocities as a function of load (p<.001), and lower maximum power (p<.001).
CONCLUSION
Both maximum strength and velocity contribute to reduced ability to move the leg quickly with age.
背景
我们量化了女性参与者围绕髋关节产生全腿部运动能力随年龄的下降情况。
方法
我们测量了12名年轻和12名年长健康女性的最大髋部力量和髋部速度。这两种能力都有助于通过促成快速腿部运动来预防跌倒。我们还测量了等张负荷作用下的最大速度。
结果
年轻参与者在屈曲时产生107.6±25.4牛米（均值±标准差）的等长扭矩，伸展时为109.3±22.3牛米。年长参与者产生的扭矩分别低22%和31%（p<0.001）。年轻参与者在屈曲时产生的最大速度为362.8±51.5度/秒，伸展时为371.5±54.2度/秒。年长参与者在两个方向上产生的速度均低16%（p<0.001）。年长参与者作为负荷函数产生的速度也较低（p<0.001），且最大功率较低（p<0.001）。
结论
最大力量和速度都导致随着年龄增长腿部快速移动能力下降。
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