Effect of repeated, on-field sprints on kinematic variables in wheelchair rugby players

Abstract

Objective 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 (LP-D) or offensive players (HP-O). Design 22 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. Results 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. Conclusions Performance variables and the rate of decline in performance variables depended on functional capacity and wheelchair type.

Impact of floor covering on wheelchair rugby players: analysis of rolling performance

“…The data collected by the IMUs were processed using a specific script involving calculation of the average of all variables for the left and right wheels for each push. We applied a fourth-order zero-lag Butterworth filter to eliminate random noise, followed by a low-pass filter with a cutoff frequency of 8 Hz and order 4 to process the signals ( 17 ).…”