Mechanical alterations during interval-training treadmill runs in high-level male team-sport players

Détails

ID Serval
serval:BIB_E794F0DECC67
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Mechanical alterations during interval-training treadmill runs in high-level male team-sport players
Périodique
Journal of Science and Medicine in Sport
Auteur(s)
Girard O., Brocherie F., Morin J.B., Millet G.P.
ISSN
1878-1861 (Electronic)
1440-2440 (Print)
Statut éditorial
Publié
Date de publication
01/2017
Peer-reviewed
Oui
Volume
20
Numéro
1
Pages
87-91
Langue
anglais
Notes
Girard, Olivier
Brocherie, Franck
Morin, Jean-Benoit
Millet, Gregoire P
eng
Australia
2016/06/04 06:00
J Sci Med Sport. 2017 Jan;20(1):87-91. doi: 10.1016/j.jsams.2016.05.002. Epub 2016 May 21.
Publication types: Journal Article
Publication Status: ppublish
Résumé
To examine mechanical alterations during interval-training treadmill runs in high-level team-sport players.
Within-participants repeated measures.
Twenty high-level male field-hockey players performed six 30-s runs at 5.53±0.19ms(-1) corresponding to 115% of their velocity associated with maximal oxygen uptake (vVO2max) with 30-s passive recovery on an instrumented treadmill. Continuous measurement of running kinetics/kinematics and spring-mass characteristics were performed and values were subsequently averaged over 20s (8th-28ths) for comparison.
Contact time (+1.1±4.3%; p=0.044), aerial time (+4.1±5.3%; p=0.001), step length (+2.4±2.2%; p<0.001) along with mean loading rates (+7.1±10.6%; p=0.026) increased from the first to the last interval, whereas step frequency (-2.3±2.1%; p<0.001) decreased. Both centre of mass vertical displacement (+3.0±6.0%; p<0.001) and leg compression (+2.8±9.7%; p=0.036), but not peak vertical forces (0.0±4.1%; p=0.761), increased with fatigue. Vertical stiffness decreased (-2.8±6.9%; p=0.012), whereas leg stiffness did not change across intervals (p=0.149).
During interval-training treadmill runs, high-level team-sport players modified their mechanical behaviour towards lower vertical stiffness while preserving a constant leg stiffness. Maintenance of running velocity induced longer step lengths and decreased step frequencies that were also accompanied by increased impact loading rates. These mechanical alterations occurred early during the set.

Pubmed
Web of science
Création de la notice
22/12/2016 14:49
Dernière modification de la notice
20/08/2019 17:10
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