title: Perceptual responses and blood lactate concentration: effect of training state.
abstract: The present study investigated the effect of training state on ratings of perceived exertion obtained at the lactate threshold (LT) and fixed blood lactate concentrations (FBLC) of 2.0, 2.5, and 4.0 mM. Runners (N = 20) and nonrunners (N = 29) completed a progressive horizontal treadmill (TM) running test which allowed identification of the TM velocities associated with the LT and FBLC. Runners attained significantly higher TM velocities, greater VO2, greater VE, greater heart rate, and a lower ventilatory equivalent for oxygen (VE/VO2) at each exercise intensity, with the exceptions of heart rate at 4.0 mM and VE/VO2 at the LT. Compared to nonrunners, runners also attained higher VO2, VE, 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.
authors.affiliation: Department of Human Services, Curry School of Education, University of Virginia, Charlottesville 22903.
authors.forename: R L
authors.initials: RL
authors.lastname: Seip
authors.forename: D
authors.initials: D
authors.lastname: Snead
authors.forename: E F
authors.initials: EF
authors.lastname: Pierce
authors.forename: P
authors.initials: P
authors.lastname: Stein
authors.forename: A
authors.initials: A
authors.lastname: Weltman
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold / Q000502:physiology*; D000704:Analysis of Variance; D006339:Heart Rate; D006801:Humans; D007773:Lactates / Q000097:blood*; D019344:Lactic Acid; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D010465:Perception / Q000502:physiology*; D012420:Running
chemical_list: D007773:Lactates; D019344:Lactic Acid