Glossary

RIR

RIR is reps in reserve — how many more reps you could have done before failing.

RIR 1 means one rep short of failure. Most training is best done at RIR 1–3.

Also known as

reps in reserve

RPE
RPE is rate of perceived exertion — a 1 to 10 scale of how hard a set felt.
Failure
Failure is the point where you can no longer complete a rep with good form.
Working set
A working set is a set taken close to failure — usually within 1 to 3 reps of stopping.

The full glossary

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