From the Laboratory Physical Activity Impact on Health (IAPS), University of Toulon, Toulon, France (SB, FB, AF); Laboratory of Biomechanics and Robotics, PPRIME Institute, CNRS, University of Poitiers, Poitiers, France (SB); Laboratory of Material to SystemIntegration (IMS), University of Bordeaux, Pessac, France (FB, TW); Laboratory of Physiology and Pharmacology, Faculty of Science, Université of Lome, Lome, Togo (KD); and Pole Parasport-ISPC Synergies, CHU Raymond Poincaré, APHP, Garches, France (DP).
Am J Phys Med Rehabil. 2024 Jun 1;103(6):547-553. doi: 10.1097/PHM.0000000000002337. Epub 2023 Sep 22.
The aim of the study was to evaluate the influence of repeated sprints on kinematic performance and propulsion variables during the acceleration and constant peak velocity phases in wheelchair rugby players classified as defensive (low point in defensive [LP-D]) or offensive players (high point in offensive [HP-O]).
Twenty-two players (13 LP-D and 9 HP-O) performed 6 × 20-m repeated sprint field tests. We calculated peak wheelchair velocities, propulsion phase times, deceleration phase times, cycle times, and left-right velocity asymmetry of the best and last sprints during the acceleration and constant peak velocity phases, the rate of decline in performance variables between the best and the last sprint and a fatigue index.
Peak velocities during the acceleration and constant peak velocity phases and mean velocity over the whole sprint were significantly higher during the best than last sprint. Peak velocities were higher during the acceleration and constant peak velocity phases for the best and last sprint for HP-O. The rate of decline in peak velocity during the constant peak velocity phase was higher for LP-D. Fatigue index and rate of decline in velocities and sprint time were higher for LP-D.
Performance variables and the rate of decline in performance variables depended on functional capacity and wheelchair type.
本研究旨在评估在轮椅橄榄球运动员的加速和恒速峰值速度阶段中，反复冲刺对运动学表现和推进变量的影响，这些运动员被分为防守型（防守低点 [LP-D]）或进攻型（进攻高点 [HP-O]）。
22 名运动员（13 名 LP-D 和 9 名 HP-O）进行了 6 次×20 米重复冲刺场测试。我们计算了加速和恒速峰值速度阶段中最佳和最后冲刺的轮椅峰值速度、推进阶段时间、减速阶段时间、周期时间以及左右速度不对称性，以及最佳冲刺和最后冲刺之间性能变量的下降率和疲劳指数。
在加速和恒速峰值速度阶段以及整个冲刺过程中的平均速度，最佳冲刺时明显高于最后冲刺。对于 HP-O，最佳和最后冲刺的加速和恒速峰值速度阶段的峰值速度都更高。在恒速峰值速度阶段，LP-D 的峰值速度下降率更高。LP-D 的疲劳指数以及速度和冲刺时间的下降率更高。
性能变量和性能变量的下降率取决于功能能力和轮椅类型。
