you need to know what your best set of five, four, three, two, or one repetition is. Of course the most accurate is the single or 1 RM, but we can get a pretty accurate 1 RM by using your best two, three, four, or five RM. Here is the formula:
Take your best and multiply it by the numbers given.
2 reps - ? x 1.06
3 reps - ? x 1.12
4 reps - ? x 1.15
5 reps - ? x 1.18
This will give an estimate of your best 1 RM without actually having to do it. Now we have a number to work with. Good Luck CDOG.........