well yeah its the most important thing in training hands down.
got to figure out how to kinda bypass the tendons and joints and put the workload on the muscle.
every single person with good physyqie has this, even if their form can apear sketchy and odd sometimes.
to get an idea how it works, well, observe a jacked and shredded person who does slow repetitions.
masters can do it very fast and seemingly sloppy, thats why seing one who works slowly is better.
stabilise,flex and then move the joints.sounds easy as hell, but is not so easy in practice.
