Pengaruh pemberian minuman karbohidrat berkafein dibanding minuman isotonik terhadap status hidrasi masa pemulihan setelah olahraga studi pendahuluan pada atlet lari jarak jauh putra usia 18 45 tahun = The effect of caffeinated carbohydrate drink compared with isotonic drink on hydration status in recovery period post exercise preliminary study on male distance runner age 18 45 years old