Prediction of time to exhaustion from blood lactate response during submaximal exercise in competitive cyclists

European Journal of Applied Physiology
Aldo SassiFranco M Impellizzeri

Abstract

The aim of this investigation was to develop and validate a new method to predict time to exhaustion (pTE) from blood lactate variables measured during a submaximal non-exhaustive constant workload cycling test in professional cyclists. A multiple regression equation to estimate pTE from blood lactate variables measured within the first 10 min of a submaximal test and TE was determined in 40 competitive cyclists. Predicted TE reliability [individual coefficient of variation (CV)] was calculated in eight amateur cyclists who repeated the proposed test three times. Seasonal variations of pTE were monitored in 12 professional cyclists. Validity of pTE was determined by the known-group difference method in 49 professional cyclists. The prediction equation was: log(n)TE = 4.2067 - 0.8221(log(n) B) - 0.2519(log(n) C), where B is the lactate concentration at the 10th minute of the constant workload test and C is the lactate slope calculated between the 5th and 10th minute (adjusted r (2) =0.83, root mean square error in cross validation=23.1%). Predicted TE CV was 11.7%. The pTE obtained at the beginning of the season and the best and worst tests performed during the competitive season, resulted 162, 224 and 103% higher than the basic...Continue Reading

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Citations

Jul 22, 2008·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Aldo SassiErmanno Rampinini
Mar 2, 2011·Journal of Strength and Conditioning Research·Murielle GarcinRégis Matran
Feb 13, 2014·Sports Medicine·Jérémy B CoquartRoger G Eston
Oct 31, 2014·Journal of Sports Sciences·Julien Pinot, Frederic Grappe
Nov 10, 2016·Nutrients·Aline Venticinque CarisRonaldo Vagner Thomatieli Dos Santos
Feb 10, 2017·Scandinavian Journal of Medicine & Science in Sports·I Garcia-TabarE M Gorostiaga
Mar 25, 2017·International Journal of Sports Physiology and Performance·Jose A Rodríguez-MarroyoCarl Foster
Feb 24, 2021·International Journal of Sports Medicine·Ermanno RampininiNicola A Maffiuletti

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