These are often confused − so don’t get your mords wixed. A repetition (or rep for short) is one complete movement of an exercise, basically one lifting and one lowering of a weight. For example, during Push-Ups, you lift your body up and lower your body down − that is one rep. If you perform 10 Push-Ups in a row, you’ve performed 1 set of 10 reps. Let’s say you take a break, perform 10 more Push-Ups, take another break, perform 10 more, and then stop. You’ve now completed 3 sets of Push-Ups, for a total of 30 reps. Changing the number of sets and reps is one of the simplest techniques for adding variety to your program.