What is: Repetition Max

repetition max

The repetition max is the amount of times you can lift a specific weight until you reach muscular failure. Sometimes strength coaches or personal trainers will have athletes find their repetition max with a lift instead of doing a 1 rep maximum lift in order to test strength. You can find an approximate 1 rep max by using this chart:


Reps % 1 RM
1 100
2 95
3 90
4 88
5 86
6 83
7 80
8 78
9 76
10 75
11 72
12 70

As an example, if you can squat 100 pounds 9 times, look in the chart to see what percentage of your 1 rep max that is. The chart says that if you can do 9 reps, 100 pounds is 76% of your 1 rep max. So divide 100 by .76 and you get 131 pounds. That is your estimated 1 rep max! You can use this to track your progress, or just see how strong you are.

Adam Pegg About Adam Pegg

Adam is an athlete with a serious passion for fitness and health. He played basketball at University of Delaware and Stetson. His degree is in health science and he's a certified personal trainer who loves helping people reach their goals.