Fig. 1

Reference values (superior, excellent, good, fair, poor) for both gender and age for a absolute oxygen uptake (ml min⁻¹), b relative oxygen uptake (ml min⁻¹ kg⁻¹), c relative oxygen uptake (ml min⁻¹ kg^−0.75), d v_LT (m s⁻¹), e % of VO₂ at v_LT (%), f RE (ml min⁻¹), g RE (ml min⁻¹ kg⁻¹), h v_peak (m s⁻¹)