Influence of rolling resistance on speed performance in wheelchair rugby, regardless of functional classification

Abstract

Our objective was to verify the associations between speed performance and wheelchair rolling resistance (R_RES) in paralympic rugby athletes. Thus, 16 athletes were evaluated at the training sites of the teams. Weights of subjects and wheelchairs were collected, R_RES was evaluated by a field procedure and a speed by the 20-meter sprint test. Data were analyzed using Pearson's correlation procedure, partial correlation and simple linear regression. The results showed that there is a negative and significant correlation between R_RES, 20-meter sprint test (r = -.825, p <.001, R² = .680, p <.001), and 20-meter propulsive power (r= .960, p <.001, R² = .922, p <.001). After controlling for the functional classification and the age of the athletes, it was verified that R_RES remained negatively correlated with speed performance (r = -.790, p = .001, R² = .624), and positively with 20-meter propulsive power (r = .963, p <.001, R² = .928). It is concluded that an R_RES can be an important element for the control of wheelchair-free speed performance, regardless of the functional class and age of the athlete.