How health behaviors relate to academic performance via affect: An intensive longitudinal study

The objective of the observational intensive longitudinal study was to investigate the association between health behaviors such as sleep and physical activity with academic performance and to test whether affect is a mechanism underlying this relation. Variable names: ID: Subject number; Day: Survey day; Sex; Age; Sem: Semester: Number of semesters studied; SQ: Sleep quality 1 (very bad) to 4 (very good); PhysAct: Physical activity: Number of minutes engaged in mild, moderate and strenuous exercise weighted by metabolic equivalents and then summed to produce a total daily leisure activity score; PA: Positive affect 1 (not at all) to 7 (extremely); NA: Negative affect 1 (not at all) to 7 (extremely); LGA: Learning goal achievement 0 (not at all) to 4 (completely); Exam: Examination success 0 (fail) 1 (pass); HSG: High school grades 1 (lowest grade) to 6 (highest grade); BDI: Beck Depression Inventory 1(not) 2 (mild to moderate) 3 (clinically relevant symptoms).