RIR
RIR: definition
Reps in Reserve. The number of reps you could still perform before reaching failure. RPE 8 = 2 RIR.
What RIR means in practice
Reps in Reserve. The number of reps you could still perform before reaching failure. RPE 8 = 2 RIR.
Use the definition as a starting point, then connect it to your programme, exercise selection, nutrition targets, or progress data.
Related Terms
RIR: quick questions
What does RIR mean?
Reps in Reserve. The number of reps you could still perform before reaching failure. RPE 8 = 2 RIR.
Why does RIR matter in fitness?
Understanding RIR makes it easier to follow programmes, interpret coaching instructions, and make informed training or nutrition decisions.
Where can I learn more about RIR?
Continue with the related concepts RPE, Progressive Overload or browse the LumaFit exercise, programme, and calculator libraries.
Your next step
Build a routine that works in real life.
Bring your training, nutrition, programmes and progress together in LumaFit.