Reps equal times you lift a certain amount ( ex: 25 pounds arm or leg lifts and repeating same movement # of times ( say 30x) would be Reps. Better to lift less weight and do more Reps.
A set is a group of repetitions. Sets and repetitions are common in strength-building exercises. For example, you might do one set of 10 push-ups: there are 10 repetitions in the set. If you do a second set of push-ups, you will have done 20 push-ups in all. In this case, two sets represent 20 repetitions.
