Electromyographic analysis of the lower extremities during pedaling, treadmill walking and squatting

Abstract

[Purpose] The purpose of this study was to determine the differences between the effects of pedaling, treadmill walking and squatting on muscle activities. [Subjects] Nine healthy subjects (mean age 21.8±2.1 years) participated in this study. [Method] Electromyographic activity during pedaling, treadmill walking and squatting was measured in eight muscles. Pedaling was performed at 60 and 120 W. Treadmill walking was performed at 4 and 6 km/h. Squats were performed once a second with 0°-90° knee flexion. [Result] The quadriceps femoris activity was significantly greater in squatting and pedaling (120 W). The hamstring activity was significantly greater in squatting and pedaling (120 W). The gastrocnemius activity was significantly greater in treadmill walking (6 km/h). The tibialis anterior activity was significantly greater in treadmill walking (6 km/h) and squatting. [Conclusion] Pedaling and squatting are effective for muscle strengthening of the quadriceps femoris. However, for high muscle activity of the gastrocnemius, treadmill walking is more effective than squatting or pedaling. For high muscle activity of the tibialis anterior, treadmill walking and squatting are more effective than pedaling.