Question 1

Should I test my real 1RM?

Accepted Answer

Advanced lifters may test occasionally with spotters. Most programs rely on estimated 1RM from 3–5 rep sets for safety.

Question 2

Which formula is most accurate?

Accepted Answer

Epley and Brzycki are similar for low reps. Averaging multiple formulas often improves estimates.

Question 3

Does this work for dumbbells or machines?

Accepted Answer

Yes for any exercise where load and reps are known, though machine friction may skew results slightly.

One Rep Max Calculator

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