One-Rep Max Guide
What a one-rep max is, how the Epley formula estimates 1RM from weight and reps, and when to use estimates vs a tested max.
Frequently asked questions
- What is a one-rep max (1RM)?
- A one-rep max is the heaviest weight you can lift once with acceptable technique for a given exercise. It is a common way to measure absolute strength and prescribe training intensities.
- How does the Epley 1RM formula work?
- Epley estimates 1RM as weight × (1 + reps ÷ 30). For example, 225 lb for 5 reps estimates about 262 lb. KinesoScore uses this for submaximal sets and also lets you enter a known 1RM.
- Is an estimated 1RM as accurate as a tested max?
- Estimates are convenient and usually close for moderate reps, but they are still estimates. Technique, fatigue, and high-rep sets can widen the gap. Use them for training guidance; confirm with a careful test when the exact number matters.
- What is an SBD total?
- SBD Total is squat + bench press + deadlift one-rep maxes added together. It summarizes overall barbell strength across the three main lifts.