To match the words to their definitions:
1. A single bout of an exercise (Doing 10 pushups would be 10 reps) - Repetitions
2. A group of repetitions (Doing 10 pushups, then taking a break and doing ten more pushups would be two sets) - Sets
3. 1 rep max, the greatest amount of weight you can lift one time, but not twice. - One-Rep Max
Repetitions refer to the number of times you perform a specific exercise, like doing 10 pushups. Sets, on the other hand, are a group of repetitions done consecutively with breaks in between, like doing 10 pushups, taking a break, and then doing another 10 pushups. Finally, the One-Rep Max is the maximum amount of weight you can lift for a single repetition of an exercise, showcasing your peak strength for that particular movement.