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Adjustment of muscle coordination during an all-out sprint cycling task

Authors :
Gaël Guilhem
Antoine Couturier
François Hug
Sylvain Dorel
French Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance (EA7370) (SEP (EA7370))
Institut national du sport, de l'expertise et de la performance (INSEP)
Motricité, interactions, performance EA 4334 / Movement - Interactions - Performance (MIP)
Le Mans Université (UM)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Université de Nantes - UFR des Sciences et Techniques des Activités Physiques et Sportives (UFR STAPS)
Université de Nantes (UN)-Université de Nantes (UN)
Motricité, interaction, performance EA 4334 (MIP)
Le Mans Université (UM)-Université de Nantes - UFR des Sciences et Techniques des Activités Physiques et Sportives (UFR STAPS)
Université de Nantes - UFR des Sciences et Techniques des Activités Physiques et Sportives (UFR STAPS)
Université de Nantes (UN)-Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Le Mans Université (UM)
Source :
Medicine and Science in Sports and Exercise, Medicine and Science in Sports and Exercise, American College of Sports Medicine (ACSM), 2012, 44 (11), pp.2154-2164. ⟨10.1249/MSS.0b013e3182625423⟩
Publication Year :
2012
Publisher :
HAL CCSD, 2012.

Abstract

International audience; Purpose: This study was designed to assess muscle coordination during a specific all-out sprint cycling task (Sprint). The aim was to estimate the EMG activity level of each muscle group by referring to the submaximal cycling condition (Sub150 W) and to test the hypothesis that a maximal activity is reached for all of the muscles during Sprint.Methods: Fifteen well-trained cyclists were tested during submaximal and sprint cycling exercises and a series of maximal voluntary contractions (MVCs) in isometric and isokinetic modes (MVC at the three lower limb joints). Crank torque and surface EMG signals for 11 lower limb muscles were continuously measured.Results:Results showed that Sprint induced a very large increase of EMG activity level for the hip flexors (multiplied by 7–9 from 150 W to Sprint) and the knee flexors and hip extensors (multiplied by 5–7), whereas plantar flexors and knee extensors demonstrated a lower increase (multiplied by 2–3). During Sprint, EMG activity level failed to reach a maximal value for hamstrings, tibialis anterior, tensor fasciae latae, and gluteus maximus (i.e.

Details

Language :
English
ISSN :
01959131 and 15300315
Database :
OpenAIRE
Journal :
Medicine and Science in Sports and Exercise, Medicine and Science in Sports and Exercise, American College of Sports Medicine (ACSM), 2012, 44 (11), pp.2154-2164. ⟨10.1249/MSS.0b013e3182625423⟩
Accession number :
edsair.doi.dedup.....30c490300ba2d9c6d5260346885efad3
Full Text :
https://doi.org/10.1249/MSS.0b013e3182625423⟩