>>76822532
>You are not "flexing the shit out of your delt" when you're set up on the pad.
it's a reflex bot, the delt flexing makes biceps not working properly during regular curls cause humerus is held vertically somehow - delt holds it up, it also interferes with long head shoulder tendon and biceps doesn't grow because of that
>>76822823
>2) active myofascial release drills exploit this behavior - poking muscle to get it relaxed
of course tendon is also on the line of fire

with preacher when u experience "muscular failure" your body still wants to hold weight cause it "knows" it's about to get fucking ripped, delt jumps into action and artificially shortens biceps and it rips

it's all good bot, little back and forth and the thing will clarify :D

and preachers are shite because there is no supination against resistance - powerband on thumb and goes on forearm through palm side, i just did it, supinate with bent elbow lying on the floor pulling from the side, i wrap towel on forearm to make it wiiiiiide so that moment arm for supination is bigger

there's also one overarching rule i follow - it ought not to hurt anywhere near the attachment nor origin of muscle, the feeling should be right smack in the middle of muscle belly, if not - that ain't it chief :D try sth different :D
like bench is felt in the armpit and that is BAD

> If he actually controlled the eccentric that would have been much less likely to happen
sure, if he could force his delt to stay dormant despite reflex reaction, agreed bot :D still lacks supination against resistance component