reps
n. countable B2 Upper Intermediate US //ˈɹɛps// UK //ɹˈɛps// reps
n. the number of times you repeat a specific exercise. It is a short way of saying 'repetitions' and is common in the gym.
n. a single performance of a specific exercise or movement. A clipped form of 'repetitions' used in fitness contexts.
I did three sets of ten reps on the bench press.
To build muscle effectively, you should focus on slow, controlled reps rather than moving as fast as possible.
While high-weight sets are essential for power, increasing the number of reps with moderate resistance is often more effective for improving muscular endurance and cardiovascular health.
Usage
Almost always used in the plural form when discussing workout volume.