Table 2. Cardiopulmonary exercise data of the 11 adolescent male and 13 female volleyball players who underwent maximal exercise treadmill test.

Values are expressed as mean ± standard deviation. n: number, HR_AT: heart rate at the anaerobic threshold, HR_max: maximal heart rate, sBP_max: maximal systolic blood pressure, dBP_max: maximal diastolic blood pressure, VO_2max: maximal oxygen uptake, VO_2AT: oxygen uptake at the anaerobic threshold, Velocity_AT: velocity at the anaerobic threshold, RER_max: maximal respiratory exchange ratio, RER_AT: respiratory exchange ratio at the anaerobic threshold, COP: cardiorespiratory optimal point, VO_2COP: oxygen uptake at the cardiorespiratory optimal point, Velocity_COP: velocity at the cardiorespiratory optimal point, HR_COP: heart rate at the cardiorespiratory optimal point.