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Elite and amateur orienteers' running biomechanics on three surfaces at three speeds
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (NVC)
Univ Franche Comte, Res Unit Dept EA4660 Dept, Culture Sport Hlth Soc, F-25030 Besancon, France.
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. (NVC)ORCID iD: 0000-0002-3814-6246
2015 (English)In: Medicine & Science in Sports & Exercise, ISSN 0195-9131, E-ISSN 1530-0315, Vol. 47, no 2, p. 381-389Article in journal (Refereed) Published
Abstract [en]

PURPOSE: Orienteering athletes must adapt to running on various surfaces, with biomechanics likely contributing to performance. Here, our aims were to identify the effect of athletic status and of surface on the running biomechanics of orienteers. METHODS: Seven elite and seven amateur male orienteers ran 20 m on road, path, and forest surfaces at maximal, 3.8 m·s, and 85% of maximal speeds. A three-dimensional motion capturing system monitored temporal gait and lower extremity kinematic parameters. Data were analyzed using mixed effects models that considered surface (road-path-forest), group (elite-amateur), and surface-group interaction effects. RESULTS: Forest running at maximal speed was slower and involved longer step and cycle times, greater knee extension at foot strike, smaller peak hip flexion and dorsiflexion during stance, and increased ranges of vertical pelvis motion compared with those observed on the road. Elites specifically exhibited greater hip extension at foot strike, larger dorsiflexion at toe-off, and lower pelvis at foot strike and toe-off, whereas amateurs displayed longer stance, greater plantarflexion at foot strike, and greater knee with lesser ankle motion. At the slowest speed, subjects exhibited greater knee flexion at foot strike, greater dorsiflexion at toe-off, shorter strides, smaller peak dorsiflexion during stance, and greater hip, knee, and vertical pelvis motions on forest than on road surfaces. Elites specifically demonstrated shorter stance, step, and cycle times whereas amateurs did not. CONCLUSIONS: Orienteering athletes adjusted their running biomechanics when off-road, with distinct adaptations observed in elite versus amateur competitors. The vertical pelvis motion was consistently greater when running off-road, coherent with reported increases in energy expenditure. However, our athletes did not exhibit more crouched lower limb postures when sprinting in the forest, indicating alternative responses to off-road running to that previously proposed by "Groucho" running.

Place, publisher, year, edition, pages
2015. Vol. 47, no 2, p. 381-389
Keywords [en]
Athletic Performance, Foot Orienteer, Kinematics, Running Off-Road, Three-Dimensional Motion Analysis
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-24605DOI: 10.1249/MSS.0000000000000413ISI: 000348100800021Scopus ID: 2-s2.0-84922018026OAI: oai:DiVA.org:miun-24605DiVA, id: diva2:849504
Note

CODEN: MSCSB

Available from: 2015-08-28 Created: 2015-03-17 Last updated: 2025-02-11Bibliographically approved

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Hébert-Losier, KimHolmberg, Hans-Christer

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