Full Extension of rear leg

[izzle1989]

@Charlie_Francis

the action is down and not back. once in contact with the ground, the response is automatic- thus the appropriate extension will occur without thought and any attempt to influence it by pushing will result in a slowing effect. The faster you are, the closer to BDC that degree of extension will occur. We’ve covered his numerous times before.
Extension can be individual, with differences noted between Asafa and Usain.

so sprinters should only focus on stepping down not back