Perceptual responses and blood lactate concentration

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Abstract
Ning test which allowed identification of the TM velocities associated with the LT and FBLC. Runners attained significantly higher TM velocities, greater V̇O2, greater V̇E, greater heart rate, and a lower ventilatory equivalent for oxygen (V̇E/V̇O2) at each exercise intensity, with the exceptions of heart rate at 4.0 mM and V̇E/V̇O2 at the LT. Compared to nonrunners, runners also attained higher V̇O2, V̇E, and heart rate relative to peak values at LT and 2.0, 2.5, and 4.0 mM. Despite these relative and absolute physiological differences, there were no differences between groups in local, central, or overall ratings of perceived exertion (RPE) (Borg scale) at any condition. The data from both groups were combined to give the following means and SD for overall RPE during horizontal running: at the LT—11.0 ± 2.0, and at FBLC of 2.0 mM—13.7 ±2.1, 2.5 mM—14.5 ± 1.8, and 4.0 mM—16.5 ± 2.3. ©1991The American College of Sports Medicine...

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