Farinha CMN, Ferreira J, Serrano J. Motivation and physical fitness in old people participating in a hydro-gymnastics. J. Hum. Sport Exerc. [Internet]. 2018 Jul. 18 [cited 2024 May 20];13(2proc):S363-S369. Available from: https://www.jhse.ua.es/article/view/2018-v13-n2-proc-motivation-physical-fitness-old-people-hydro-gy