Equal and opposite elbows at foot strike

What is considered foot strike when the first part of the foot hits or the whole foot plants? This pertains to timing of equal and opposite elbows for timing. Thanks .

Either is fine. Using “first contact” is probably sufficient. I normally use the cue of staying equal and opposite “as long as possible” - most pitchers won’t stay equal and opposite beyond full foot contact.

i think of it as being most of the weight is shifted to the lead leg, if not full weight… arms should be somewhat equal/opp with the throwing arm at the high cocked position

this position us just before upper body rotation and throwing arm needs to be position comfortably