On resting in between reps: It varies with the length of the set. 5s or fewer get a breath to reset. Longer sets might take 2 breaths. During the last few reps of a true 20RM squat, just do what Jesus tells you. Trust me, if you do an honest 20 rep program, at some point Jesus will talk to you. On the last day of the program, he asked if he could work in.
Mark RippetoeExercise is not a thing we do to fix a problem - it is a thing we must do anyway, a thing without which there will always be problems
Mark RippetoeI don't even like Greg Glassman. I don't have a cult like allegiance to the guy. I really don't like him. He's too hard to get on the phone and he doesn't drink my kind of scotch.
Mark RippetoeFor young males that weigh between 150-200 lbs., deadlifts can move up 15-20 lbs. per workout, squats 10-15 lbs., with continued steady progress for 3-4 weeks before slowing down to half that rate. Bench presses, presses, and cleans can move up 5-10 lbs. per workout, with progress on these exercises slowing down to 2.5-5 lbs. per workout after only 2-3 weeks. Young women make progress on the squat and the deadlift at about the same rate, adjusted for bodyweight, but much slower on the press, the bench press, cleans, and assistance exercises.
Mark Rippetoe