Aim of the study to find out the effect of uphill, down hill and sprint running on treadmill on forced vital capacity among long distance runners. For the purpose of the study, random group design was employed. Randomly selected long distance runners (N=60) were divided into four groups consisting of 15 in each group. Experimental Group I underwent uphill treadmill walking and running exercises, experimental group II underwent down hill treadmill walking and running exercises and experimental group three underwent sprint running on treadmill, group four was control group which did not participated in any special training. The control group did not participate in any special exercises except of their routine. Pre test scores were obtained using standard test on forced vital capacity before the experimental period and the post test scores were obtained immediately after the twelve weeks experimental period. The difference between the pre test and post test means were subjected to statistical treatment using ANCOVA, which was the effect of uphill, downhill and sprint running on treadmill. In all cases 0.05 level was fixed to test the hypothesis of the study.