Introduction Different propulsion strategies exist in wheelchair sports depending on the sport, equipment, and classification of the athlete In athletes with high classifications, and therefore greater trunk muscles strength, have greater involvement of the trunk during a sprint, which varies with pushing velocity 1 One study showed that isometric trunk strength in a wheelchair athletes were not directly correlated with the acceleration as the latter depended on rolling resistance 2 But in this study, the the dynamic action of the trunk was not measured during propulsion For this reason, it would be interesting to study the influence of trunk movements during propulsion in sports requiring more mobility such as wheelchair basketball. We hypothesized that the flexion/extension range of motion of the trunk (FEROMT) has an impact on the variations in velocity during a sprint. Protocol: 13 elite female wheelchair basketball players 5 with a classification of 3.5 and above (high points) and 8 with a classification lower than 3.5 (small points) with their own sports wheelchair. The players ran 6 x 20 m sprints successively in a straight line with 20 seconds of recovery between each. IMUs were placed on the spokes of each wheel 3 and in the center of the back at the spine level, between Th 2 and Th 8 IMU measured the rotation velocity of the wheels and the trunk with integrated gyrometers. Results:-Correlation between the mean acceleration per pushing phase and FEROMT (p=0.015). No correlation between the mean deceleration per recovery phase and FEROMT (p=0.103). No correlation between the classification of athletes and FEROMT (p=0.068). However, on average high points had a greater FEROMT than small points (21.52 ± 6°and 14.7 ± 2.6°, p=0.00017) as seen in the literature. Discussion: FEROMT seems to differ according to classification however differences are not systematic The movement of the trunk during wheelchair propulsion appears to be beneficial in order to accelerate without increasing the deceleration during the recovery phase This could indicate that trunk motion is beneficial to performance, bringing further insight to the study of Vanlandewijck et al 2011.