The terms, defined in one sentence.

So that anyone — and any search engine — can quote them without ambiguity.

ACWR · acute:chronic workload ratio

ACWR compares the load of the last 7 days with the average of the last 4 weeks; between 0.8 and 1.3 is the optimal zone, and above 1.5 the risk of injury increases.

RPE · rating of perceived exertion

RPE is the player’s rating of perceived exertion from 1 to 10; multiplied by the minutes it gives the internal load (sRPE).

RTP · return to play

RTP is the phased protocol for bringing an injured player back safely.

Readiness · index 0–100

Readiness is an index from 0 to 100 that summarises whether the player is ready to perform, combining wellness, load and injuries.