Although it is well established that exercise aids in the prevention of disease, recent surveys suggest that many Americans do not engage in regular physical activity. The present experiment examined one possible technique for increasing regular exercise, in sedentary college students. Previous studies had shown that students who are directed to think about action strategies that would increase studying subsequently report greater intentions to study. The present experiment found that directed thinking about actions to increase a target exercise significantly increased time spent on exercising and cardiovascular fitness. The results are discussed in terms of theoretical perspectives on attitude processes.