What are reps? Reps = repetitions, the number of times you repeat an exercise movement in a set. Example: 10 movements = 10 reps. An exercise movement is essentially a single 'rep'. Example: a squat. What are sets? A set is a group of repetitions (reps) of an exercise movement, done without stopping. Example: 10 squats with no rest between each, is 1 set of 10 reps.