1RM
One-Repetition Maximum
Short definition
Maximum weight with which an exercise can be performed for exactly 1 repetition.
Full definition
1RM is the maximum weight for a single correct repetition, used to normalize intensity (% 1RM) and assess strength. It can be measured directly or estimated from N repetitions using Epley or Brzycki equations.
Examples
Bench-press 1RM is 100 kg, so 80 % = 80 kg.