You immediately see Josh Schaub propelling his structure of 90 degree angles forward by engaging the top of his calves and lowest part of his hamstring. This is so significant and can be clearly seen is how he maintains the 90 degree angle between his calf and hamstring on his push or trail leg and lands maintaining the 90 degree angle between his lead leg calf and hamstring - You also see Josh repeatedly using the top of the calf and lower hamstring push to rotate his body both forward and back

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