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.
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