Can you ‘lock out’ on pulling movements? What would that be called if you could by another name(?) when the stretched position is held by ligaments and tendons and not the ‘actual’ joint if I am making myself clear.
Interesting question. My 'no full lockout' rule of training applies to both push and pull movements. And I'll tell you how (none of this applies to competition lifts because lockout is required). But the difference between push vs pull is one simple distinction:
Push: Muscles are locked out at the top of the *concentric* phase (ex. knees on squats and leg presses, elbows and shoulders on bench presses) putting all weight *resting* on joints and connective tissues = bad
Pull: Muscles are "locked out" at the top of the *eccentric* phase (arms fully extended on chins and pull downs, arms fully extended on rows, weight on the floor or lower on deadlifts) with all weight *pulling* on joints and connective tissues = bad
So whether cramming the weight into your joints or the weight pulling bones out of your joints, both are bad.
Remember this applies to multiple repetition training where TUT should be maximized. Don't jam your bones into their sockets with 100's of force *or* pull your bones out of their sockets with 100's of lbs/kg of force. It's just bad policy. If powerlifting, with low repetitions, you must lockout and have no choice. But powerlifting is far harder on joints than progressive training with higher volume work and training for size. Not strength training or 1RM. Sux but based on powerlifting competition rules, there's no alternative.