The purpose of the study was to compare the circadian rhythm on body temperature between college hockey and football players. To achieve the purpose of this study, the investigator selected twenty men hockey players and twenty college men football players, who participated in inter-collegiate level tournaments from different colleges in C. S. J. M. University, Kanpur. The subjects were in the age group of 19 to 24 years. Since hockey players and football were selected as independent variable for this study and body temperature was considered as independent variables. Body temperature was measured with the help of Thermometer. The data collected from the subjects on body temperature at time 6 a.m., 10 a.m., 2 p.m. and 6 p.m. were tested for differences through two analysis of variance and level of significance was set at 0.05. It was concluded that there was significant difference in the circadian rhythm of hockey and football players under different timings in body temperature.