Triple Lutz analysis: reply to trainers on the toe-pick phase
Résumé
The parallel between trainers and specialists of athletic movements mechanical analysis is an essential step to improve elite athletes performances. Thus, the Centre d'Analyse d'Image et Performance Sportive Poitou- Charentes (CAIPS) was set up to enlarge exchanges and to make them bidirectional. Providing trainers observations with the measure, the CAIPS allows to establish a dialog by a common vocabulary between scientists and trainers. Thus, the two communities can work together in the field combining science with technique and adapting the speech to the needs of each. Now, this work structure allows to reply to trainers questions on specific movements, which are moreover explosive. In that capacity the French Federation of Ice Sports was interested in the analysis of triple Lutz toepick phase realized by a specialist. Few papers were published on the triple Lutz (Kobbi, 2002), while the loop jump and the Axel were largely analyzed (King, 1994; 1997). Nevertheless these complex jumps were mainly studied for their aerial phase and the established relations between body position, rotation velocity and performance. In order to answer trainers questions, this study had to highlight the time histories of the support lower-limb joints angles and the horizontal velocity variation of the skater body mass center (MCB) during toe-pick phase.