Keep the trail knee flexed to keep your power
Porzak insists the trail leg must stay bent through the swing — 'that knee has to be flexed.' Straighten the trail leg and there's no push-off: he points out no sport has you drive off a straight trail leg, and when it locks out you 'couldn't push off to create the speed.' Keep the trail knee flexed to keep your power.
Channel: PorzakGolf
Watch official source at 5:46Why this context matters
Delivered via a cross-sport analogy — a straight trail leg cost an athlete his push-off speed.