title: Determination of blood lactate training zone boundaries with rating of perceived exertion in runners.
abstract: This study aimed to determine the rating of perceived exertion (RPE) values corresponding to the blood lactate concentration (BLC) training zone boundaries (2 and 4 mmol·L) in moderately trained runners using the Borg CR-10 scale. Moderately trained runners (n = 95) performed a submaximal incremental test on a treadmill, recording BLC and RPE at every stage. Simple linear regression analysis was used to determine the RPE values corresponding to the BLC training zone boundaries, which revealed that RPE was significantly and strongly correlated with BLC (r = 0.821, p < 0.001, R = 0.675, adjusted R = 0.674, standard error of estimate = 1.18). The prediction equation (RPE = 1.092 × BLC + 2.143) was obtained, and RPE values at the BLC training zone boundaries of 2 and 4 mmol·L were calculated as 4.3 (95% confidence interval [CI], 3.9-4.7) and 6.5 (95% CI, 6.0-7.1), respectively. In conclusion, the RPE values at the BLC training zone boundaries of 2 mmol·L (4.3) and 4 mmol·L (6.5) were adequately predicted. Rating of perceived exertion (4.3 and 6.5) can be used as an affordable tool for controlling intensity to maintain the athletes in prescribed zones during training sessions.
authors.affiliation: 1Department of Neurosciences and Imaging, "Gabriele d'Annunzio" University of Chieti-Pescara, Chieti, Italy; 2Department of Physical Education, State University of Londrina, Londrina, Brazil; and 3Marathon Sports Medical Centre, Brescia, Italy.
authors.forename: José L
authors.initials: JL
authors.lastname: Dantas
authors.forename: Christian
authors.initials: C
authors.lastname: Doria
authors.forename: Huber
authors.initials: H
authors.lastname: Rossi
authors.forename: Gabriele
authors.initials: G
authors.lastname: Rosa
authors.forename: Tiziana
authors.initials: T
authors.lastname: Pietrangelo
authors.forename: Giorgio
authors.initials: G
authors.lastname: Fanò-Illic
authors.forename: Fábio Y
authors.initials: FY
authors.lastname: Nakamura
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005080:Exercise Test; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D016014:Linear Models; D008297:Male; D064797:Physical Conditioning, Human / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology*
chemical_list: D019344:Lactic Acid