like the title says, what % of my 1RM should I be working at to gain strength? for example on flat BB bench I do 3 sets: ~60% of 1RM 8reps ~70% of 1RM 8reps ~85% of 1RM 6reps this along with other chest stuff i do once a week. i've been stuck at the same weight for awhile now. should i do more weight? less weight?