Relationship between the lower limb loading force and leg muscle activities

Abstract

In this study, with respect to lower limb loading force measurement which has been introduced as a simple lower limb function assessment method, we measured the femoral region electromyogram and lower limb loading in real time, and examined the role of femoral muscles in lower limb loading force relevant to dynamic shifts. The subjects were 9 healthy men at the time of measurement of loading force their loading capacity, and electromyograms of quadriceps femoris and biceps femoris were measured. On the measurement of lower limb loading force, the muscle discharge amount of both quadriceps femoris and biceps femoris were increased, but it was greater in quadriceps femoris, suggesting that the contribution of the muscle action of quadriceps femoris to loading force exertion is large. From the difference of arrival time to peak value between the amount of muscle discharge and loading, we consider that factors other than lower limb muscle strength participate in lower limb loading forces.