The Journal of Sport and Healt Research (JSHR) is an associated journal to D.A.A. association, a professional health journal, sport and education.

Silva, A., Figueiredo, P., Abraldes, J.A., Marques, E.A., Soares, S., Fernandes, R.J. (2013). Arm sincronization in infant group front crawl swimmers. Journal of Sport and Health Research. 5(3):295-304.



The Index of Coordination (IdC) is used to determine the inter arm coordination and their propulsive arm phases. The aim of this study was to characterize the IdC in front crawl technique of young swimmers. 60 infant group swimmers performed was analyzed. The protocol was 25m in apnea in front crawl at high velocity. Two underwater cameras (sagital and front plan) were used to digitize two stroke cycles (APASystem®). Statistical analysis was based on the measurement of means and standard deviations, as well as a t-test for independent measures and the correlation coefficient. The significance difference was established in 95% (p<0.05). This study showed that, in crawl, only catch-up coordination was observed in young swimmers. These swimmers spend more time in entry and catch phase rather than pull phase, which is in opposition to what is described in the literature for adult swimmers. Boys showed higher values regarding speed and stroke frequency.




Kinematics, swimming, front crawl, age group, performance.


Journal of Sport and Health Research - 2009