Sets Vs Reps: Whats the difference?

For the purpose of explaining sets, reps and rest periods we will use the “Squat” exercise as an example. 

The Squat is a lower-body dominant exercise working most of your leg muscles in one single movement. 

The squat starts in a standing position. 

You drop your hips down between your legs as if sitting into an
invisible chair. 

Every time you go from the starting position, down into the bottom position and return back up to the original standing position you complete one repetition of the Squat exercise. 

This is called a “Rep” for short. 

“Reps” or “Repetitions” are then grouped into what are called “Sets“.