Physiological responses during intermittent running exercise differ between outdoor and treadmill running.
Fiche publication
Date publication
mai 2017
Journal
Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme
Auteurs
Membres identifiés du Cancéropôle Est :
Pr LEPERS Romuald
Tous les auteurs :
Panascì M, Lepers R, La Torre A, Bonato M, Assadi H
Lien Pubmed
Résumé
The aim of this study was to compare the physiological responses during 15 min of intermittent running consisting of 30 s high intensity running exercise at maximal aerobic velocity (MAV) interspersed with 30 s passive recovery (30-30) performed outdoor versus on a motorized treadmill. Fifteen collegiate physically active males (age: 22±1 years-old; body mass: 66±7 kg; stature: 176±06 cm, weekly training volume: 5±2 h·week-1), performed Fitness Intermittent test 45-15 in order to determine VO2max and Maximal Aerobic Velocity (MAV) and then completed in random order three different training sessions consisting of 30s run -30s rest outdoor on athletic track (30-30 Track) at MAV; 30s run -30s rest on treadmill (30-30 Treadmill) at MAV; 30s run -30s rest at MAV+15% (30-30+15% MAV Treadmill). VO2, time above 90%VO2max (t90%VO2max), Rating of Perceived Exertion (RPE), were measured during each training session. We observed a statistical significant underestimation of VO2 (53.1 5.4 ml·kg-1·min-1 vs 49.8 6.7 ml·kg-1·min-1, - 6.3%, P = 0.012), t90%VO2max (8.6 11.5% vs 38.7 32.5%, -77.8%, P = 0.008), RPE (11.4 1.4 vs 16.5 1.7, -31%, P < 0.0001) during the 30-30 Treadmill compared to the same training session performed on track. No statistical differences between 30-30+15% MAV Treadmill and 30-30 Track were observed. The present study demonstrates that an 15% increase in running velocity during a high intermittent intensity treadmill training session is the optimal solution to reach the same physiological responses than an outdoor training session.
Mots clés
athletic track, consommation maximale d’oxygène, entraînement par intervalles, interval training, motorized treadmill, oxygen uptake, piste d’athlétisme, tapis roulant
Référence
Appl Physiol Nutr Metab. 2017 May;: