Estimated one-rep max
An estimated one-rep max uses a logged set to predict the most weight you might lift once.
Estimated one-rep max: a practical example
For example, an app uses the weight and completed reps in a set to display an estimated 1RM.
Use it in your log
When you log your workout, keep this in mind: it is a model, not a measured maximum or an instruction to attempt that weight.
Next, use the workout log to keep names, weights and reps in one place. Then check your progress across sessions.
Related terms
These examples explain terms. They do not tell you what to lift. If you need help with a plan, ask a qualified trainer.
Updated October 22, 2026. For more context, read the ACSM training guide (2009). However, terms can vary by plan.