Rifa’i, Mochamad, Sri Sumartiningsih, and Agung Wahyudi. 2022. “The Effect of Exercise Using A Float And Leg Length On The Results Of The 50 M Breaststroke Swimming Speed ”. JUARA : Jurnal Olahraga 7 (2), 431-41. https://doi.org/10.33222/juara.v7i2.2014.