Fig. 4From: Using a simple rope-pulley system that mechanically couples the arms, legs, and treadmill reduces the metabolic cost of walkingNet metabolic power demand for walking. Using the arm-leg pulley system reduced the net metabolic power required to walk by 17% (mean ± SD, n = 8). Each line segment represents a subject, highlighting the observation that all subjects showed a reduction in net metabolic power (* indicates p < 0.05)Back to article page