Training
One-rep max
Also called 1RM
One-rep max (1RM) is the heaviest load you can lift once with good form for a given exercise.
Training loads are often set as a percentage of 1RM. It can be estimated from a set of a few reps with formulas such as Epley (weight × (1 + reps ÷ 30)) or Brzycki, which is safer than testing a true maximum.
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In our guides
General information, not medical advice.