Leg stiffness of older and younger individuals over a range of hopping frequencies

被引：11

作者：

Hobara, Hiroaki ^{[1
]}

Kobayashi, Yoshiyuki ^{[1
]}

Yoshida, Eiichi ^{[2
]}

Mochimaru, Masaaki ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Digital Human Res Ctr, Tokyo 1350064, Japan

[2] CNRS AIST JRL, Joint Robot Lab, CRT UMI3218, Tokyo, Japan

来源：

JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY | 2015年 / 25卷 / 02期

关键词：

Spring-like leg behavior; Spring-mass model; Aging; AGE-RELATED DIFFERENCES; TRICEPS SURAE; MUSCULOSKELETAL STIFFNESS; MORPHOLOGICAL PROPERTIES; GENDER-DIFFERENCES; STRIDE FREQUENCY; MASS; ADJUSTMENT; MUSCLES; SPRINGS;

D O I：

10.1016/j.jelekin.2015.02.004

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

The purpose of this study was to compare spring-mass behavior between older and younger individuals at a range of hopping frequencies. A total of 14 elderly and 14 young subjects performed in-place hopping in time with a metronome at frequencies of 2.2, 2.6, and 3.0 Hz. Using a spring-mass model, leg stiffness was calculated as the ratio of maximum ground reaction force to maximum center of mass displacement at the middle of the stance phase during ground contact. The lower extremities of both groups behaved like a simple spring-mass system at all three hopping frequencies. Further, statistical analysis revealed the existence of a significant interaction between hopping frequency and age group on leg stiffness. These results suggest that the sensitivity of leg stiffness to accommodate for variations in hopping frequency is likely to differ between elderly and young individuals. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：305 / 309

页数：5

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