In exercise, a "rep" is short for "repetition," which refers to the number of times you perform a specific exercise before taking a short break. For example, one pushup is one rep, and 10 pushups are 10 reps. A "set" is a collection of reps. When you complete several reps of a specific exercise in a row, it is called a set. It is a common workout strategy to do a planned number of sets of each exercise, with time built in for a short rest between these sets. For example, a weight training workout plan including triceps dips might include instructions to do 3 sets of 12 reps with a 30-second rest in between sets. Reps and sets are used to organize workouts and have many benefits, such as gauging your baseline strength and measuring your progress. When doing strength training, you should aim to train to failure, which means you should aim to fatigue your muscles during the exercise. The American College of Sports Medicine recommends 12-15 reps of a light load to increase endurance, 8-10 reps of a moderate load to aid hypertrophy, and 3-5 reps of a heavy load to build strength.