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1RM (One Rep Max)

The maximum weight you can lift for a single repetition with proper form.

Your one-rep max (1RM) is the heaviest weight you can lift once with good technique. It is a measure of maximal strength and is used to calculate training percentages. For example, hypertrophy training often uses 65-85% of 1RM. You can test your 1RM directly (with spotters) or estimate it using rep max calculators based on how many reps you can complete with a submaximal weight.

Examples

  • 315lb 1RM squat
  • Training at 70% of 1RM (220lbs if 1RM is 315)
  • Testing 1RM every 8-12 weeks

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