training
One-Rep Max (1RM)
The maximum weight you can lift for a single repetition with correct form.
Your One-Rep Max is the primary benchmark for strength and is used to program training intensities (e.g. "5 sets of 3 at 85% 1RM"). Direct 1RM testing is stressful and risky — most programs estimate it using submaximal rep-max formulas. Use our 1RM calculator to estimate from a 3–10 rep set.