> Raising your leg is hip flexion. Oh, shoot, you're right. Thanks for the correction. > The system produces two forces: one to assist in lifting the leg and

> Raising your leg is hip flexion. Oh, shoot, you're right. Thanks for the correction. > The system produces two forces: one to assist in lifting the leg and another to aid in pushing the leg forward. If that's the case, then this model must assist in hip flexion and extension -- helping you raise one leg as it gently pushes back on the other to drive you forward. It would certainly lower the metabolic cost of walking, but I'm not sure of the magnitude of the effect.