被动刚度与肌肉力量输出之间的关系：肌肉横截面积归一化的影响。

The relationship between passive stiffness and muscle power output: influence of muscle cross-sectional area normalization.

机构信息

Department of Health and Human Performance, Oklahoma State University, Stillwater, Oklahoma, USA.

出版信息

Muscle Nerve. 2014 Jan;49(1):69-75. doi: 10.1002/mus.23861. Epub 2013 Oct 4.

DOI:10.1002/mus.23861

PMID:23558664

Abstract

INTRODUCTION

We examined the relationship between passive stiffness of posterior hip and thigh muscles and muscle power output before and after normalization of passive stiffness to muscle cross-sectional area (CSA).

METHODS

Pearson correlation coefficients (r) were used to assess the relationships between the normalized and non-normalized slopes of the initial (phase 1) and final (phase 2) portions of the angle-torque curve and peak power output (Pmax).

RESULTS

A significant positive relationship was observed between the non-normalized slope of phase 1 and Pmax (r = 0.723; P ≤ 0.001); however, no correlations were observed between the normalized slope of phase 1 and Pmax (r = 0.244; P = 0.299) nor between Pmax and the normalized and non-normalized slopes of phase 2 (r = -0.159-0.418; P = 0.067-0.504).

CONCLUSIONS

The findings suggest that muscle size, rather than stiffness, accounted for a significant portion of the variance in muscle power output.

摘要

引言

我们研究了髋关节和大腿后肌被动僵硬与肌肉力量输出之间的关系，以及在将被动僵硬归一化为肌肉横截面积（CSA）前后的关系。

方法

采用皮尔逊相关系数（r）评估初始（第 1 阶段）和最终（第 2 阶段）角度-扭矩曲线的归一化和非归一化斜率与最大功率输出（Pmax）之间的关系。

结果

观察到第 1 阶段非归一化斜率与 Pmax 之间存在显著正相关关系（r=0.723；P≤0.001）；然而，在第 1 阶段的归一化斜率与 Pmax 之间没有观察到相关性（r=0.244；P=0.299），第 2 阶段的归一化和非归一化斜率与 Pmax 之间也没有相关性（r=-0.159-0.418；P=0.067-0.504）。