This study aimed to examine the longitudinal changes in lifestyle and health of young Japanese male students at one of the National Colleges of Technology. A questionnaire consisting of 36 items on lifestyle and health was administered to 127 healthy male students aged 15 years for three years. The frequencies by cross tabulation between the first and fourth year students for each item were calculated, and the frequency and the mean of differences between both groups were examined. From the results of statistical analysis, the following significant changes were found during the three year study: the time and frequency of exercise decreased, and meals became irregular. Participation in housework and part-time jobs increased. Wake-up and bedtimes became later and overall sleep decreased. Overall, the degree of subjective health declined. In conclusion, appropriate guidance regarding exercise time, meals, sleeping, and other considerations for health may be required for male students at the National Colleges of Technology.
