Department of Health and Human Performance, Oklahoma State University, Stillwater, Oklahoma, USA.
Muscle Nerve. 2014 Jan;49(1):69-75. doi: 10.1002/mus.23861. Epub 2013 Oct 4.
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).
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).
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).
The findings suggest that muscle size, rather than stiffness, accounted for a significant portion of the variance in muscle power output.
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。
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。
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）。
研究结果表明，肌肉力量输出的变化主要归因于肌肉大小，而不是僵硬度。
