A rep is a repetition — that is, the number of times you do an exercise before you take a short break. A set is a group of repetitions, like two sets of 15 reps. Strength training is a type of ...
When you lift a weight, how many times should you lift it? Supposedly, there’s a correct “rep range” to use to build strength, and a different rep range to build muscle size, or endurance, or to “tone ...