“…During high-speed running, lower limb vertical velocity at touchdown has been cited as a critical factor needed to generate large vertical forces. …”
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“…In this investigation, we quantified the following during steady-speed running: (a) peak forward foot speed during the swing phase, (b) backward foot speed at touchdown, and (c) ground speed difference (GSD), i.e., the difference between forward running speed and backward foot speed at touchdown. …”
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“…RESULTS: Males showed significant unadjusted relationships between practice velocity and step length (r=0.668; P=0.002), horizontal backward foot velocity at touchdown (r=0.459; P=0.048), and upper leg full extension angle (r=–0.585; P=0.009). …”
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