Heart rate parameters obtained by the metabolic cart and HRM during the ETT (means ± SD), correlation between metabolic cart and HRM, bias, and two one-sided test (TOST) equivalency limits.

Upper and lower equivalency bounds were defined as 6 bpm. Bias: Difference between metabolic cart and HRM parameters. BPM beats per minute, HRM heart rate monitor, HRmax maximum heart rate, HRR1 heart rate recovery at 1 minute post-exercise, HRR2 heart rate recovery at 2 minutes post-exercise, TOST two one-sided test.