Scand. j. med. sci. sports Scand. j. med. sci. sports High‐sensitivity cardiac troponin t release after the 20‐m shuttle run test in 733 healthy children and adolescents Conesa-Milian Enric Batalla-Gavaldà Abraham Hernández-González Vicenç López-Laval Isaac Universidad de Zaragoza Corbi Francesc Cirer-Sastre Rafel Legaz-Arrese Alejandro Universidad de Zaragoza Reverter-Masia Joaquin 2026 research-article