Influences on change in expected and actual health behaviors among first-year university students.

Background: First-year students often adopt health risk behaviors during their first semester such as increased consumption of unhealthy food, decreased physical activity, and increased alcohol use. Expectations, social tie's efforts to motivate behavior, and coresidence with parents can influence said behaviors. Aims: We assessed how students' health behaviors and expectations change over the first semester, and how the aforementioned factors influence the maintenance or change of behavior and expectations. Methods: A longitudinal survey design was implemented. A total of Results: Current and expected food consumption and physical activity became healthier over time. The current and expected number of drinks consumed per month increased. Change in expectations for physical activity, number of drinks and binge drinking were predicted by the initial respective behavior. The number of drinks and expected physical activity became unhealthier in relation to reported initial parental influence to drink and to be physically inactive. Moving out of the parental home predicted an increase in current and expected number of drinks and in current and expected binge drinking. These effects of moving out were not mediated by perceived parental or peer influence. Conclusions: Interventions should target these behaviors and expectations during the first semester and address parental influence on physical activity and alcohol use.