Using Rogers' science of unitary human beings, changes in hope and power among 104 lung cancer patients were examined in relation to participation in a preoperative exercise program. Participants were randomly assigned to exercise or no-exercise and a repeated measures ANOVA was employed. The exercise group's power increased while the no-exercise group's power decreased. No differences in hope emerged. Positive correlations between hope and power were observed. Findings suggest that exercise is a form of knowing participation in change and illustrate a relation between one's ability to envision a better future and one's potential to actualize options through choice.