Training effect of repeated rolling motions on boccia players with severe cerebral palsy: comparison with the effect of conventional upper-limb training using a crossover test.

[Purpose] The present study aimed to establish evidence regarding comparisons between training methods for boccia players with severe cerebral palsy. [Participants and Methods] Ten boccia players with severe cerebral palsy were enrolled in this study. This intervention had a cross-over design. Participants were divided into two groups based on the training method applied. The study period was divided into an upper extremity training period and an interval rolling training period, which lasted 4 weeks each. Each was separated by a 4-week training detraining period. Joint range of motion and throwing distance were measured before and after the interventions and the effects were compared and verified. [Results] Compared to upper extremity training, interval rolling training significantly expanded the range of motion and improved throwing distance in bocce players with severe cerebral palsy. [Conclusion] Collectively, interval rolling training is more effective than upper limb training in improving the physical function and throwing distance of boccia players with severe cerebral palsy.

Throwing distance and competitive performance of Boccia players.

[Purpose] This study aimed to clarify the relationship between throwing distance and competitive performance in Boccia players in order to establish a training program based on this evidence. [Participants and Methods] In total, 40 athletes, who competed in the Japan Boccia Championships and are certified players of the Japan Boccia Association, participated in the study. Participants threw the Boccia ball as far as possible, and throwing distances were compared between certified players (Group I, n=8), those who participated in the final round (Group II, n=9), and those who lost in the preliminary round (Group III, n=23). [Results] The maximum throwing distances were 16.38 ± 5.17 m (Group I), 10.67 ± 2.66 m (Group II), and 8.34 ± 2.73 m (Group III). Group I threw the ball significantly farther than Groups II and III. [Conclusion] Boccia is a target sport and throwing farther distances requires more effort. In addition, being able to throw at a longer distance means that Boccia players can throw a stronger ball and use this for various tactics. The results of this study suggest that long-distance throwing training would be effective in improving the competitive performance of Boccia players.