Influence of resistance, speed of movement, and forearm position on recruitment of the elbow flexors.

In this experiment, it was found that the maximum recruitment of the elbow flexors, with the exception of Pronator Teres, was greater with the forearm in the supinated position. Increases in the resistance and the speed of movement placed greater demands on all muscles. This was reflected by the increased EMG levels. These findings have clinical implications in the rehabilitation of the elbow flexors following musculo-skeletal or neurological pathology. It is suggested that a program of strengthening of the elbow flexors should include activities in the supinated position. This position places the greatest demand on the major elbow flexors. Additional demands can be made by alteration in the resistance and speed of movement.