The effect of exercises with an innovative device for the undulating trunk movement in developing technical performance and achieving 50 m butterfly swimming. Damu Journal of Sport Sciences, [S. l.], v. 2, n. 1, p. 138–150, 2025. Disponível em: https://damujss.com/index.php/home/article/view/203.. Acesso em: 7 feb. 2026.