Lower limb mechanical asymmetry during repeated treadmill sprints.

Détails

ID Serval
serval:BIB_25A898C9839D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Lower limb mechanical asymmetry during repeated treadmill sprints.
Périodique
Human movement science
Auteur(s)
Girard O., Brocherie F., Morin J.B., Millet G.P.
ISSN
1872-7646 (Electronic)
ISSN-L
0167-9457
Statut éditorial
Publié
Date de publication
04/2017
Peer-reviewed
Oui
Volume
52
Pages
203-214
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Stride mechanical imbalances between the lower limbs may be detrimental to performance and/or increase injury risks. This study describes the time course and magnitude of asymmetries in running mechanical variables during repeated treadmill sprints and examines whether inter-limb differences in sprinting mechanics increase with fatigue. Thirteen non-injured male athletes performed five 5-s sprints with 25-s recovery on an instrumented treadmill, allowing the continuous (step-by-step) measurement of running kinetics/kinematics and spring-mass characteristics calculation. For each variable, bilateral leg asymmetry (BLA%) between the left and the right leg was defined as: {[(high value-low value)/low value]×100}. BLA% for propulsive power and horizontal forces averaged ∼12-13%, while lower values occurred for step-averaged values of running velocity, resultant and vertical forces (all ∼4%). For all sprints, kinematic BLA% ranged from 1.6±1.0% (swing time) to 9.0±5.3% (aerial time). BLA% for vertical and leg stiffness was 6.4±4.9% and 7.6±3.6%, respectively. While distance covered decreased across repetitions (P<0.05), there was no significant interaction between sprint repetitions and leg side for any of the mechanical variables studied (all P>0.05). Although inter-limb differences were observed for many running kinetics/kinematics and spring-mass characteristics during repeated treadmill sprints, the lack of interaction between sprint repetitions and leg side suggests that lower limbs fatigued at a similar rate.

Mots-clé
Adult, Athletes, Biomechanical Phenomena/physiology, Exercise Test, Fatigue, Functional Laterality/physiology, Humans, Leg/physiology, Lower Extremity/physiology, Male, Running/physiology
Pubmed
Création de la notice
04/03/2017 14:27
Dernière modification de la notice
20/08/2019 14:04
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