步行过程中关节功率的年龄相关变化:中年成人适应保持步行速度的适应
B C Muir1, J M Haddad2, R E A van Emmerik3
1VA RR&D Center for Limb Loss and MoBility (CLiMB), VA Puget Sound Health Care System, Seattle, WA, USA; Department of Mechanical Engineering, University of Washington, Seattle, WA, USA; Department of Health and Kinesiology, Purdue University, West Lafayette, IN, USA; Center for Aging and the Life Course, Purdue University, West Lafayette, IN, USA.
中年成人通过灵活调整脚关节的能量吸收和产生来保持步行速度. 这种适应,与老年人不同,防止速度下降,尽管能量输出减少.
科学领域:
- 生物力学 生物力学
- 老年学是一门学科.
- 人类运动科学科学 人类运动科学
背景情况:
- 步行速度通常在60岁以后下降.
- 年长的成年人减少了脚推开功率 (A2) 以获得稳定性,这减缓了步行速度.
- 中年成年人可以调整关节力量以保持步行速度,因为生理系统下降.
研究的目的:
- 为了量化与年龄相关的部,膝盖和脚关节在步行过程中的变化.
- 为了比较三个年龄组的步态生物力学:年轻人 (20-35岁),中年 (50-64岁) 和老年人 (65-79岁).
主要方法:
- 参与者 (年轻人,中年人,老年人) 以自己选择的速度行走.
- 在15米长的步道上进行了10次行走试验.
- 计算了部,膝盖和脚关节的力量.
主要成果:
- 年长的成年人比年轻的 (1.44 m/s) 和中年 (1.44 m/s) 成年人走得更慢 (1.33 m/s).
- 中年和年长的成年人比年轻的成年人表现出较低的脚下部能量产生 (A2).
- 与年轻和年长的成年人相比,中年成年人显示脚能量吸收减少 (A1).
结论:
- 中年成年人通过减少脚能量吸收 (A1) 来保持步行速度,从而允许脚上更快的前进旋转.
- 这种灵活地适应能量吸收和产生是中年人的新发现.
- 与年龄相关的步态适应在中年人和老年人之间有所不同,中年人表现出补偿策略来保持速度.
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