Association Between Muscular Tension and Work Output

E.M.G. electrodes were placed on the right forearm and chin of ten subjects while they performed simple addition. It was possible to record from one pair of electrodes the amount of muscular activity in the right forearm while the other pair indicated the moment of speaking and thus the speed of work. The variations in muscular tension and in speed of work were followed during the course of addition and this intra‐sum analysis revealed a different relationship from that found when larger units of work were taken. In the former case a marked tendency was found for increases in speed to be accompanied by low levels of tension, whereas when sums were taken as units no consistent relationship was apparent between the two variables within any one subject. This and other discrepancies are briefly discussed

Association (psychology) · Chin · Forearm · Moment (physics) · Physics · Tension (geology) · Thermodynamics · Work (physics) · Anatomy · Chemistry · Medicine · Muscle activation and electromyography studies · Psychology