Reliability and validity of the new portable Nordic hamstring test device (IVMES H-Bord) - Akarçesme, C.; Cengizel, E.; Alvurdu, S.; Bagci, E.; Altundag, E.; Cengizel, Ç. Ö.; Senel, Ö. (Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 2026)