What Does RIR Mean in Fitness? A Complete 2026 Guide
RIR in fitness stands for Reps in Reserve, a number that tells you how many more reps you could have done before reaching complete muscular failure on a given set. It’s one…
RIR in fitness stands for Reps in Reserve, a number that tells you how many more reps you could have done before reaching complete muscular failure on a given set. It’s one…