Frey-Law Laura A, Laake Andrea, Avin Keith G, Heitsman Jesse, Marler Tim, Abdel-Malek Karim
Physical Therapy & Rehabilitation Science Graduate Program, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
J Appl Biomech. 2012 Dec;28(6):726-37. doi: 10.1123/jab.28.6.726. Epub 2012 Jul 6.
Recognizing the importance of both the torque-angle and torque-velocity relations, three-dimensional (3D) human strength capabilities (i.e., peak torque as a function of both joint angle and movement velocity) have been increasingly reported. It is not clear, however, the degree to which these surfaces vary between joints, particularly between joints with similar biomechanical configurations. Thus, our goal was to compare 3D strength surfaces between the muscles about the elbow and knee hinge joints in men and women. Peak isometric and isokinetic strength was assessed in 54 participants (30 men) using the Biodex System 3 isokinetic dynamometer. Normalized peak torque surfaces varied significantly between flexion and extension (within each joint) and between joints; however, the normalized 3D torque surfaces did not differ between men and women. These findings suggest the underlying joint biomechanics are the primary influences on these strength surface profiles. Therefore, in applications such as digital human modeling, torque-velocity-angle relationships for each joint and torque direction must be uniquely represented to most accurately estimate human strength capability.
认识到扭矩 - 角度和扭矩 - 速度关系的重要性后，三维（3D）人体力量能力（即作为关节角度和运动速度函数的峰值扭矩）的相关报道越来越多。然而，尚不清楚这些曲面在不同关节之间的变化程度，尤其是在具有相似生物力学结构的关节之间。因此，我们的目标是比较男性和女性肘关节和膝关节铰链周围肌肉的3D力量曲面。使用Biodex System 3等速测力计对54名参与者（30名男性）进行了等长和等速峰值力量评估。归一化峰值扭矩曲面在屈伸之间（每个关节内）以及不同关节之间存在显著差异；然而，归一化的3D扭矩曲面在男性和女性之间并无差异。这些发现表明，潜在的关节生物力学是这些力量曲面轮廓的主要影响因素。因此，在数字人体建模等应用中，必须唯一地表示每个关节的扭矩 - 速度 - 角度关系和扭矩方向，以最准确地估计人体力量能力。
