[RaftPeople]

A recent study that I read showed muscle strength is best developed by not performing the maximum number of <lift/exercise/whatever>. It showed that stopping somewhere around 90%-ish was optimal, beyond was suboptimal for strength.

For muscle size, going to maximum is optimal, but it's less optimal for strength.

Their example was: instead of doing 8 reps of bench press where you can barely get the final rep, do maybe 1 fewer. They were more precise in the point to stop, but it's not something avg person can detect compared to their analysis, so this is just ballpark-ish.