10RM
Also known as: Ten-repetition maximum
A ten-repetition maximum (10RM) is the greatest load a person can lift for ten consecutive repetitions of a specific exercise while maintaining the chosen technique and range-of-motion standard. A set of ten is only a 10RM if an eleventh acceptable repetition could not be completed; ten comfortable repetitions are not a maximum.
Like every repetition maximum, a 10RM is specific to the exercise, equipment, setup, tempo, and endpoint. Rest before the attempt and fatigue from earlier sets also affect it. If the aim is to compare performance over time, keep those conditions reasonably consistent and record meaningful changes.
A 10RM can be tested directly or estimated from another set. Direct testing avoids a conversion formula but still reflects that day's performance and requires a demanding near-failure set. A calculator can convert weight and repetitions into an estimated 10RM, yet the relationship between repetition counts differs between people and exercises. The result should therefore be treated as an estimate, especially when the input set was far from failure or used a very different rep range.
The 10RM and 1RM answer different questions. A 1RM reflects the heaviest successful single and is strongly influenced by maximal-strength skill. A 10RM reflects performance across a longer set and includes a larger fatigue component. One can improve without the other changing by exactly the same percentage.
The web-based Alpha Progression RM calculator estimates both values from an entered set. The app can also calculate an estimated 10RM for completed sets, which creates a common scale for comparing performance when weight and repetitions change. A rising estimate across comparable sessions can support a progress assessment, but one unusually strong set is not enough to establish a durable trend.