“The Influence Of Push-Ups On The Accuracy Of Underhand Serves In The Women’s Volleyball Team Of Universitas PGRI Adi Buana Surabaya” (2024) Jurnal Ilmiah Adiraga : Jurnal Penelitian Olahraga, 10(2), pp. 58–68. doi:10.36456/adiraga.v10i2.9783.