Fig. 1From: Test–retest reliability of the FitMáx©-questionnaire in a clinical and healthy populationBland–Altman plot for the FitMáx questionnaire. Notes The colors indicate the reason of the CPET visit. The dashed line represent the limits of agreement (− 1.96 to 1.96 SD). The solid line represents bias and the dotted line is the zero bias lineBack to article page