Relative activation of elbow flexor muscles during the starting and stopping phases of limb motio

Purpose. The purpose of this study was to perform a comprehensive evaluation of muscle activity during the starting and stopping phases of limb motion.;Methods. Subjects performed a gradation of accelerations during both the starting and stopping phase of elbow flexion-extension motions at inertias corresponding to lx, 2x and 4x regular limb inertia. Surface EMG and MMG were gathered from biceps brachii and brachioradialis; EMG of triceps was also obtained. The signal from an accelerometer attached to the distal end of the moving limb segment was used to compute angular acceleration, jerk and velocity; an inverse dynamics approach was used to estimate joint torque.;Results. Significant correlations (0.5