Fig. 2From: Critical inspiratory pressure – a new methodology for evaluating and training the inspiratory musculature for recreational cyclists: study protocol for a randomized controlled trialDescription of steps to calculate critical inspiratory pressure. a Incremental inspiratory muscle endurance test. b Constant load test. c Linear regression to determination of critical inspiratory pressure (PThC). MIP, maximal inspiratory pressure; min, minute; REC, recoveryBack to article page