What is one-rep maximum?

A "one-rep maximum" (1RM) is the maximum amount of weight you can lift for one repetition of a given exercise while maintaining proper form and full range of motion. Andrew Huberman explains that understanding your 1RM is crucial for designing effective strength training programs, as it helps in determining the appropriate weight ranges for various training goals. For instance, exercises done at 30% to 80% of your 1RM are generally optimal for muscle hypertrophy and strength development 1.