Physiological cardio-respiratory variables in the HUNT 3 Fitness study stratified by intensity levels, sex and age groups.

<p>Data are presented as arithmetic mean ± SD. Workload: treadmill exercise load, fc: cardiac frequency, fB: breathing frequency, VE: minute ventilation, VT: tidal volume, VCO2: expired carbon dioxcide, VO2: oxygen uptake, R: respiratory exchange ratio, BMI: body mass index, VThan: ventilatory anaerobic threshold, RCP: respiratory compensation point.</p><p>Physiological cardio-respiratory variables in the HUNT 3 Fitness study stratified by intensity levels, sex and age groups.