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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
EXERCISE PHYSIOLOGY AND BIOMECHANICS
Ravier G., Grappe F., Rouillon J. D.
Unité de Formation et de Recherche en Sciences et Techniques des Activités Physiques et Sportives Laboratoire des Sciences du Sport, Besançon, France
Aim. The aim of this study was to analyze the links between tests performances (vertical jump and force-velocity sprint on cycle ergometer) and 2 different karate level groups in order to propose a test battery adjusted to karate.
Methods. Twenty-two karate competitors (10 national junior team (IJ) and 12 national competition level (NL)) performed 4 maximal squat jumps (SJ), 4 maximal counter movement jumps (CMJ) on an ergojump and 3 8-s sprints on a friction braked cycle ergometer (friction loads of 0.5, 0.7, 0.9 N·kg-1). The maximal theoretical force (F0) and velocity (V0), the maximal power output (Pmax) and the optimal pedalling velocity (Vopt) were derived from both the force — velocity and the power — velocity relationships plotted from all the 3 friction loads data. V0, F0, Vopt, Pmax and the best SJ and CMJ, were compared between IJ and NL groups.
Results. The IJ group was characterised by significantly higher values of V0 (+13%) and SJ (+14.3%) compared to NL group, whereas no significant difference was observed between groups for F0. Thus, karate performance would depend on maximal velocity and explosive strength. In addition, Vopt was significantly higher in IJ group compared to NL group (135.4 rpm vs 119.2 rpm, p<0.001). Although based upon indirect evidence, these results accounted for mechanical functional capabilities of experts which could be particularly valuable when monitoring training of karate competitor.
Conclusion. A force-velocity and a vertical jump tests may be applied in the functional assessment of karate competitor.