Abbreviation for “repetition.” The number of times you lift and lower a weight in one set of an exercise. So if you lift the barbell 5 times before you rack it, that’s “5 reps.”

A group of reps. If a workout calls for 3 sets of 10 reps (3×10), you’ll perform 10 reps of the lift. That’s one set. Rest. Perform the second set of 10 reps. Rest. Perform the third set of 10.

How long a workout lasts. The time from the beginning of the workout to the end.

Personal Record — the most weight you’ve ever lifted on a particular lift.

Abbreviation for “one rep max.” The maximum amount of weight that you can lift for a given exercise. The easiest way to determine your 1RM is to put weight on the bar until you can’t lift it more than [..]

Sets of two reps.