Seven reasons to brake leg swing just before heel strike
نویسندگان
چکیده
When walking (at moderate or fast speeds) or running, humans apply a burst hip torque to start leg swing and then again, at the end of the swing phase, to brake and reverse motion of their swing leg prior to heel-strike. The resulting rearward rotation of the swing leg, so called swingleg retraction, is also observed in animal gaits. Why is this retraction a common feature of many walking and running animals? Previous studies have shown that swing leg retraction aids the robustness of walking three ways:
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