It was hypothesized that a person's estimates of the preventability of health problems would be related to health behaviors such that a person who engages in healthful behavior should make higher estimates of preventability. A study was conducted to investigate the relationship between causal attribution of health problems and health-related behavior. College students (N=57) completed the Preventability Scale by estimating the extent to which a number of problems could have been prevented by the victim of the problem. Their estimates, reported in terms of the percentage of cases that they considered to be preventable, constituted the dependent variable. Subjects also completed the Multidimensional Health Locus of Control scales and a self-report questionnaire of health-related behaviors. The independent variable was the frequency with which subjects engaged in such health-related behaviors as exercise, diet control, smoking, and thrill seeking. The results showed that subjects differed significantly regarding their estimates of preventability of heart attack depending upon how much jogging and other exercise they did. People who jogged often though heart attacks and hypertension were more preventable than did subjects who jogged less often or not at all. The findings have implications for cognitive behavior modification and cooperation with prescribed lifestyle changes. (Author/NB)