title: Improvement of energy expenditure prediction from heart rate during running.
abstract: We aimed to develop new equations that predict exercise-induced energy expenditure (EE) more accurately than previous ones during running by including new parameters as fitness level, body composition and/or running intensity in addition to heart rate (HR). Original equations predicting EE were created from data obtained during three running intensities (25%, 50% and 70% of HR reserve) performed by 50 subjects. Five equations were conserved according to their accuracy assessed from error rates, interchangeability and correlations analyses: one containing only basic parameters, two containing VO2max or speed at VO2max and two including running speed with or without HR. Equations accuracy was further tested in an independent sample during a 40 min validation test at 50% of HR reserve. It appeared that: (1) the new basic equation was more accurate than pre-existing equations (R(2) 0.809 versus. 0,737 respectively); (2) the prediction of EE was more accurate with the addition of VO2max (R(2) = 0.879); and (3) the equations containing running speed were the most accurate and were considered to have good agreement with indirect calorimetry. In conclusion, EE estimation during running might be significantly improved by including running speed in the predictive models, a parameter readily available with treadmill or GPS.
authors.affiliation: Laboratoire 'Réponses cellulaires et fonctionnelles à l'hypoxie', Université Paris 13, Sorbonne Paris Cité UFR SMBH EA2363, 74 rue Marcel Cachin, F-93017 Bobigny Cedex, France.
authors.forename: Keyne
authors.initials: K
authors.lastname: Charlot
authors.forename: Jérémy
authors.initials: J
authors.lastname: Cornolo
authors.forename: Rachel
authors.initials: R
authors.lastname: Borne
authors.forename: Julien Vincent
authors.initials: JV
authors.lastname: Brugniaux
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Richalet
authors.forename: Didier
authors.initials: D
authors.lastname: Chapelot
authors.forename: Aurélien
authors.initials: A
authors.lastname: Pichon
mesh_terms: D000328:Adult; D001823:Body Composition; D004734:Energy Metabolism; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010809:Physical Fitness / Q000502:physiology; D015203:Reproducibility of Results; D012420:Running / Q000502:physiology*; D055815:Young Adult