Theory of Planned Behavior and Perceived Role Model as Predictors of Nutrition and Physical Activity Behaviors Among College Students in Health-Related Disciplines.

Physical activity (PA) and nutrition behaviors among college students in health-related disciplines are understudied. We used theory of planned behavior (TPB) and role model beliefs (RMB) to predict PA and eating behaviors of college students in health-related programs (nurses, physical education, exercise science, and athletic training). A 26-item survey was administered among the participants. Independent variables included TPB constructs and RMB measured on a 5-point scale. PA was measured by multiplicative scores of students' number of days by the amount of time spent exercising per week. Nutrition behavior was measured using fruits (2½ c-eq/day), vegetables (2½ c-eq/day), dairy (2 c-eq/day), grains (6 oz-eq/day), and proteins (5½ oz-eq/day). Multiple regression analyses were used to predict PA and nutrition behaviors. A total of 271 college health majors (mean age 22.5 ± 4.6 years) participated in the study. The majority (56.8%) of students did not meet the weekly PA guidelines and 43.2% did not meet the recommended dietary guidelines for daily servings of food groups combined. Regression analyses showed that outcome evaluation, behavioral belief, and RMB, were significantly related with student's PA behavior and they accounted for 34%, 8%, and 1% of the variance, respectively (total R2 = 44.7). Outcome evaluation and behavioral beliefs were significantly related with nutritional behavior and they accounted for 13.3%, and 5.3% of the variance respectively (total R2 = 18.6). TPB (outcome evaluation, behavioral belief) and RMB could be used to guide programs in promoting PA and nutrition behavior among college health majors.