Journal article
Changes in running mechanics and Spring-Mass behaviour during a 5-km time trial
International Journal of Sports Medicine, Vol.34(9), pp.832-840
2013
Abstract
Research into the biomechanical manifestation of fatigue during exhaustive runs is increasingly popular but additional understanding of the adaptation of the spring-mass behaviour during the course of strenuous, self-paced exercises continues to be a challenge in order to develop optimized training and injury prevention programs. This study investigated continuous changes in running mechanics and spring-mass behaviour during a 5-km run. 12 competitive triathletes performed a 5-km running time trial (mean performance: ̴17 min 30 s) on a 200 m indoor track. Vertical and anterior-posterior ground reaction forces were measured every 200 m by a 5-m long force platform system, and used to determine spring-mass model characteristics. After a fast start, running velocity progressively decreased (− 11.6%; P<0.001) in the middle part of the race before an end spurt in the final 400–600 m. Stride length (− 7.4%; P<0.001) and frequency (− 4.1%; P=0.001) decreased over the 25 laps, while contact time (+ 8.9%; P<0.001) and total stride duration (+ 4.1%; P<0.001) progressively lengthened. Peak vertical forces (− 2.0%; P<0.01) and leg compression (− 4.3%; P<0.05), but not centre of mass vertical displacement (+ 3.2%; P>0.05), decreased with time. As a result, vertical stiffness decreased (− 6.0%; P<0.001) during the run, whereas leg stiffness changes were not significant (+ 1.3%; P>0.05). Spring-mass behaviour progressively changes during a 5-km time trial towards deteriorated vertical stiffness, which alters impact and force production characteristics.
Details
- Title
- Changes in running mechanics and Spring-Mass behaviour during a 5-km time trial
- Authors/Creators
- O. Girard (Author/Creator)G. Millet (Author/Creator)J. Slawinski (Author/Creator)S. Racinais (Author/Creator)J. Micallef (Author/Creator)
- Publication Details
- International Journal of Sports Medicine, Vol.34(9), pp.832-840
- Publisher
- Georg Thieme Verlag
- Identifiers
- 991005541729507891
- Copyright
- © 2013 Georg Thieme Verlag KG Stuttgart
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
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- Citation topics
- 1 Clinical & Life Sciences
- 1.172 Sports Science
- 1.172.648 Exercise Physiology
- Web Of Science research areas
- Sport Sciences
- ESI research areas
- Clinical Medicine