Previous research suggests that time perspective relates to health behavior; however, researchers have frequently employed inconsistent operational definitions and have often used projective or unpublished measures. The Zimbardo Time Perspective Inventory was created to provide a sound, objective measure of five distinct time perspective components. We examined the independent prediction of both risky and protective health behaviors from future, hedonistic, and fatalistic time perspective in 1,568 undergraduates using the ZTPI. Health behaviors included alcohol, drug, tobacco, and seat belt use, sex behaviors, and exercise. Future time perspective was related to increased protective and decreased risky health behaviors, whereas hedonism exhibited an opposite pattern though was a stronger predictor; fatalism was related only to health-destructive behaviors. Gender interactions reveal that hedonism is a stronger predictor of risky health behaviors for females.Health behaviors contribute to half of all deaths annually (Mokdad, Marks, Stroup, & Gerberding, 2004). Health-related risk behaviors (e.g., smoking, excessive drinking) are actions that may result in immediate or long-term negative health consequences, whereas health-related protective behaviors (e.g., condom use, seat belt use) are actions that maintain or improve health status. Public health efforts to enhance population health attempt to reduce risk behaviors and to promote protective behaviors (see Healthy People 2010; USDHHS, 2000), and are considered most successful when guided by theory (Fishbein, 2000;Fishbein & Yzer, 2003).Many behavioral theories purport to explain health behavior and to facilitate risk reduction and health promotion. Theories that are purely informational provide incomplete explanations and poor prediction of existing behavior and behavior change; more sophisticated theories recognize the important role played by motivational forces (Fisher & Fisher, 1992;Miller, 1985;Prochaska, DiClemente, & Norcross, 1992). One motivational construct that shows considerable promise in predicting health-related risk and protective behaviors is time perspective.Generally, time perspective refers to the relative temporal orientation that motivates (i.e., guides and influences) an individual's typical actions and goals. Zimbardo and Boyd (1999) theorize that time perspective consists of five factors: past-positive, past-negative, presenthedonistic, present-fatalistic, and future orientation (see Boyd & Zimbardo, 2005, for a thorough discussion). In health-related research, past orientation has demonstrated little explanatory capability among young adults; consequently, the preponderance of research with this population focuses on an analysis of present and future time perspective as predictors of health behavior.Please address correspondence regarding this manuscript to: James M. Henson, Ph.D., Department of Psychology, 244C Mills Godwin Bldg., Old Dominion University, Norfolk, VA 23529-0267, Email: jhenson@odu.edu, Telephone: 757-683-5761....