The study was purposed to examine the effect of circannual rhythm (seasonal changes) on selected physiological variables among Kashmir collegiate students. In order to satisfy the purpose 120 male college students were randomly selected from the 4 different colleges located at 4 different altitude levels of Kashmir valley. Their age ranged from 18 to 23 years. The study was designed in accordance with the guidelines issued by the ethics committee at Annamalai University. All the tests were took place in between the four seasons. The stadiometer and weighing machine was used for obtaining the B.I.M and the skin fold caliper was used for obtaining the Body Fat. The collected data was analyzed by analysis of variance (ANOVA) and Scheffe’s post hoc test. A significant reduction was found in B.I.M and Body Fat. In conclusion the present study shows that change has been shown in both variables between the subjects from different colleges with different altitudes.