Fig. 3From: Reducing the energy cost of walking in older adults using a passive hip flexion deviceAverage torque profile applied by the Exoband during the gait cycle (a). Net metabolic power during NO_EXO (black) and during the Exoband condition with the lowest metabolic power (red) (b). Data are group means ± SD. * indicates a significant difference (p < 0.05) with respect to NO_EXOBack to article page