Walk into a serious gym in the 1970s, and you’d often see lifters cranking out 21s — partial and full reps combined for a brutal, muscle-frying pump. These sets weren’t a gimmick; they created tension ...

I’ve been hyperaware of overtraining ever since I suffered a pelvic stress fracture a decade ago. The injury came from excessive exercise and a lack of education around nutrition and recovery, but the ...