Effect of Constraint Loading on the Lower Limb Muscle Forces in Weightless Treadmill Exercise

Figure 4

Muscle forces at gravity and five loading modes at weightlessness. The muscle forces were normalized with the body weight. For each muscle, the curve of the forces in the full gait cycle under 6 loading conditions was compared. Muscle forces at weightless condition were greater than those at gravity. (a) Biceps femoris; (b) gastrocnemius; (c) vastus; (d) soleus; (e) rectus femoris.