Journal article
Changes in leg spring behaviour, plantar loading and foot mobility magnitude induced by an exhaustive treadmill run in adolescent middle-distance runners
Journal of Science and Medicine in Sport, Vol.18(2), pp.199-203
2015
Abstract
Objectives
This study aimed to determine adjustments in spring–mass model characteristics, plantar loading and foot mobility induced by an exhaustive run.
Design
Within-participants repeated measures.
Methods
Eleven highly-trained adolescent middle-distance runners ran to exhaustion on a treadmill at a constant velocity corresponding to 95% of velocity associated with VO2max (17.8 ± 1.4 km h−1, time to exhaustion = 8.8 ± 3.4 min). Contact time obtained from plantar pressure sensors was used to estimate spring–mass model characteristics, which were recorded (during 30 s) 1 min after the start and prior to exhaustion using pressure insoles. Foot mobility magnitude (a composite measure of vertical and medial–lateral mobility of the midfoot) was measured before and after the run.
Results
Mean contact area (foot to ground), contact time, peak vertical ground reaction force, centre of mass vertical displacement and leg compression increased significantly with fatigue, while flight time, leg stiffness and mean pressure decreased. Leg stiffness decreased because leg compression increased to a larger extent than peak vertical ground reaction forces. Step length, step frequency and foot mobility magnitude did not change at exhaustion.
Conclusions
The stride pattern of adolescents when running on a treadmill at high constant velocity deteriorates near exhaustion, as evidenced by impaired leg-spring behaviour (leg stiffness) and altered plantar loading.
Details
- Title
- Changes in leg spring behaviour, plantar loading and foot mobility magnitude induced by an exhaustive treadmill run in adolescent middle-distance runners
- Authors/Creators
- F. Fourchet (Author/Creator) - Aspire AcademyO. Girard (Author/Creator) - Qatar Orthopaedic and Sports Medicine HospitalL. Kelly (Author/Creator) - Qatar Orthopaedic and Sports Medicine HospitalC. Horobeanu (Author/Creator) - Aspire AcademyG.P. Millet (Author/Creator) - University of Lausanne
- Publication Details
- Journal of Science and Medicine in Sport, Vol.18(2), pp.199-203
- Publisher
- Elsevier BV
- Identifiers
- 991005541977207891
- Copyright
- © 2014 Sports Medicine Australia.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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32 Record Views
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.34 Orthopedics
- 1.34.480 Foot and Ankle Disorders
- Web Of Science research areas
- Sport Sciences
- ESI research areas
- Clinical Medicine