Originally Posted by
perman
How many reps you can and should do at different percentages varies not only based on individuals, sex, age, but also on lifts. A commonality though is that the larger the loads are, the lower the percentages ought to be for volume/backoff work (and by percentages, I mean percentages of 1RM, meaning larger percent back-offs for bigger lifts). A part of perfecting programming is getting those percentages more fine-grained for you at your current level than 5% increments which suit population recommendations more, meaning you may discover you can handle ~91% for squats, ~89% for deadlifts and ~96% for bench press for instance. Experiment away.