Evel Knievel
A rep maximum (RM) in weight training is the maximum amount of weight on can lift for a given number of repetitions on THAT day during THAT workout. If the workout calls for a 5 rep maximum in the squat, that means 5 squat reps at the heaviest weight possible. If you can only do 4 reps, then you went too heavy and now know your 4 RM. If you can do 6 reps, then you did not go heavy enough...