Maximum voluntary joint torque as a function of joint angle and angular velocity: Model development and application to the lower limb
Maximum voluntary joint torque as a function of joint angle and angular velocity: Model development and application to the lower limb
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DOI：
10.1016/j.jbiomech.2007.03.022
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Nussbaum, Maury A.
中科院分区：
文献类型：
--
作者：
Anderson, Dennis E.;Madigan, Michael L.;Nussbaum, Maury A.
在对体力活动进行分析时，人体力量的测量可能很重要。此类测量通常采用单一关节角度和角速度下的最大自主扭矩的形式。然而，可利用的力量随关节位置和速度有很大变化。在研究动态活动时，力量测量应考虑这些变化。本文提出了一个最大自主关节扭矩作为关节角度和角速度函数的模型。该模型基于肌肉力与长度以及肌肉力与速度之间众所周知的生理关系，并通过将其与下肢六种不同用力的最大自主关节扭矩数据进行拟合来进行测试。在髋关节伸展、髋关节屈曲、膝关节伸展、膝关节屈曲、踝关节跖屈和背屈过程中收集了等长、向心和离心最大自主收缩的数据。按性别和年龄组报告了这些用力方向各自的模型参数。该模型提供了一种有效的方法，通过这种方法，力量随关节角度和角速度的变化可纳入通过逆动力学计算的关节扭矩与最大可用关节扭矩之间的比较中。（c）2007爱思唯尔有限公司。保留所有权利。
Measurements of human strength can be important during analyses of physical activities. Such measurements have often taken the form of the maximum voluntary torque at a single joint angle and angular velocity. However, the available strength varies substantially with joint position and velocity. When examining dynamic activities, strength measurements should account for these variations. A model is presented of maximum voluntary joint torque as a function of joint angle and angular velocity. The model is based on well-known physiological relationships between muscle force and length and between muscle force and velocity and was tested by fitting it to maximum voluntary joint torque data from six different exertions in the lower limb. Isometric, concentric and eccentric maximum voluntary contractions were collected during hip extension, hip flexion, knee extension, knee flexion, ankle plantar flexion and dorsiflexion. Model parameters are reported for each of these exertion directions by gender and age group. This model provides an efficient method by which strength variations with joint angle and angular velocity may be incorporated into comparisons between joint torques calculated by inverse dynamics and the maximum available joint torques. (c) 2007 Elsevier Ltd. All rights reserved.