A 6-COMPONENT PADDLE SENSOR TO ESTIMATE KAYAKER’S PERFORMANCE: PRELIMINARY RESULTS

The purpose of this study was to measure the paddle shaft-hand interaction while an athlete paddled a kayak ergometer. The paddle shaft was specifically equipped with two 6-component force sensors to measure the contact force between the athlete’s hands and the paddle shaft. In order to minimise the error of the data collected, this new instrumentation was specifically calibrated for this experience. Preliminary results suggested that this new instrumentation provided data of high interest to improve our knowledge of the propulsion and recovery phases while kayaking an ergometer. In the future, this innovative instrumentation could be used during on-water sessions

Biomechanical contribution to kayak activity analysis. Implementation and validation of three-dimensional dynamics measurement

Les méthodes modernes d'entraînement utilisent des appareillages spécifiques appelés ergomètres sur lesquels, en particulier, des programmes d'entraînement et d'évaluation sont proposés par les entraîneurs. De tels dispositifs favorisent la continuité d'un entraînement pendant les périodes peu favorables à une pratique sportive. De même, lorsque ces outils sont instrumentés, ils apportent à l'entraîneur des informations difficilement accessibles en situation réelle de pratique. Ce travail s'inscrit dans cette problématique scientifique dont l'objet est la conception d'un ergomètre pour la pratique du kayak en ligne. Les travaux réalisés ont conduit à la conception d'un ergomètre kayak capable de reproduire les conditions d'une pratique écologique aussi précisément que possible tant d'un point de vue de la gestuelle (cinématique) que des efforts générés (dynamique) d'une part, de proposer et de valider une instrumentation afin de recueillir l'ensemble des efforts d'interaction kayakiste/ergomètre, d'autre part. De plus, cette instrumentation doit être suffisamment exigeante en termes de poids et d'encombrement pour être installée dans un kayak K1 pour réaliser des mesures in situ. Les moyens mis en œuvre donnent accès aux variables biomécaniques permettant de quantifier les éléments de base de la technique de pagayage qui constituent l'ensemble des facteurs déterminants de la performance (force, endurance, technique, etc.). Scientifiques et entraineurs ont ainsi à leur disposition un outil pour une évaluation objective des performances du kayakiste. Ce travail a été réalisé dans le cadre d'une collaboration entre l'axe RoBioss, le CAIPS et la société SENSIX.The modern training methods developed during the last 20 years involve specific equipments named ergometer. These devices allow semi-specific training sessions on a sheltered environment to develop strength during unfavorable periods of in situ practice. They are also more and more used by coaches to evaluate athlete’s skills and aptitudes. Ergometers provide numerical information that cannot be easily measured during in situ sessions. This work is a significant contribution of the following scientific problems; firstly the design of a flat-water kayak ergometer that reproduces accurately on-water conditions, both kinematics and forces generated (dynamic) during the throughout the whole kayaking cycle, secondly, to propose and validate an instrumentation to collect every dynamic interactions between the ergometer and kayaker (hands, seat, feet). In addition, this instrumentation must be design in terms of weight, size and watertightness to be installed in a kayak K1 for in situ measurements. This instrumentation quantifies the basic biomechanics parameters of the kayaking performance such as external forces, endurance, technique, etc. As a result, researchers and coaches will be able to evaluate kayakers’ performance using an unbiased device. This work was conducted as part of a scientific collaboration between the RoBioSS research team, CAIPS and SENSIX compagny

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