I've heard than muscle builds at a different speed in people over forty and that it's necessary to use weights in a different way - specifically, with less weight and in shorter sets - for that ...
How to strengthen *very gently* your grip in order to safely perform chin-ups? Are wrist wraps good?
I have recently started trying to do negative chin-ups in several occasions, but afterwards I feel a mild pain in both my left and right wrists. It is not the kind of "healthy" discomfort of sore ...