Case study on the usefulness of an instrumented constant brake for the evaluation of the propulsive force of the fins in lifesavers. RIAA [Internet]. 2022 Apr. 29 [cited 2026 Aug. 4];6(11):23-8. Available from: https://revistas.innovacionumh.es/index.php/investigacionactividadesacuatica/article/view/1658