The purpose of this study was to survey the effects of drinking milk on some of the physicalcapabilities of 13-15 years old boys in Shahr -e Kord. The statistical population was all the13-15 years old boys; which 30 of them were selected from Hazrat-e-Ghaem Elementary schooland were divided in to 3 groups of milk1; milk2; and control group. Physical readiness testsincluding: 540 meter running; sit-up; pull-up; and sit and reach tests were taken from all thesubjects in the groups. Before starting the tests; the subjects had similar standard breakfast; thencontrol group didn’t take milk; milk1 group did intake 250 c.c milk 1 hour before the tests andmilk2 group 2 hours before the starting the tests. Descriptive Statistics were used for normaldistribution; Levine test was used for homogeneity of variances; and one-way ANOVA andTukey post hoc tests were used to show the differences between the groups. The results showedthat there was a significant difference between training groups in cardio respiratory variable;which was between milk groups. There was no significant difference between groups inabdominal and shoulder girdle muscles endurance; and flexibility.