Journal article
Lower limb mechanical asymmetry during repeated treadmill sprints
Human Movement Science, Vol.52, pp.203-214
2017
Abstract
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.
Details
- Title
- Lower limb mechanical asymmetry during repeated treadmill sprints
- Authors/Creators
- O. Girard (Author/Creator) - Qatar Orthopaedic and Sports Medicine HospitalF. Brocherie (Author/Creator) - Institut National du Sport, de l'Expertise et de la PerformanceJ-B Morin (Author/Creator) - Observatoire de la Côte d’AzurG.P. Millet (Author/Creator) - University of Lausanne
- Publication Details
- Human Movement Science, Vol.52, pp.203-214
- Publisher
- Elsevier B.V.
- Identifiers
- 991005545428607891
- Copyright
- © 2017 Elsevier B.V.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.172 Sports Science
- 1.172.414 Training Optimization
- Web Of Science research areas
- Neurosciences
- Psychology
- Psychology, Experimental
- Sport Sciences
- ESI research areas
- Psychiatry/Psychology