One hundred and twenty-five freshman students, assigned to two groups, were used for this study. Each subject completed both 12-minute and 6-minute jogging tests. The reliability of the test was established by comparing the two groups' 12-minute test results. Six-minute test results were compared between the two groups, and there was no significant difference at the .01 level. The validity of the 12-minute test had previously been established (r=.90); thus, the 6-minute test scores were compared with the 12-minute test scores. The result was r=.85. (Author)