ABSTRACT
Engaging in physical activity (PA), minimizing sitting time and consuming a healthy diet are behaviors associated with health and wellness across the lifespan. The present multi-study analysis examined the relationship between grit and PA, sitting time and dietary behaviors in several populations that included US adults, active-duty military personnel, veterans, college students and performing artists. The four research laboratories administered an internet-based survey between spring and summer of 2020. The common questionnaires on the surveys were the Grit Scale Short Form, International Physical Activity Questionnaire Short Form and the Rapid Eating Assessment for Participants Short Form. Multiple regression analyses were conducted to examine the association between grit, PA, sitting time and dietary behaviors. PA was associated with grit for US adults, civilians and college students but not for performing artists or active-duty military populations. Sitting time was associated with grit for US adults and active-duty military personnel. US adults, college students and performing artists were found to have a positive association between healthy dietary behaviors and grit. Overall, the findings indicate that grit has a positive influence on PA, sitting time and dietary behaviors across the unique populations;however, the relationships indicate some nuanced differences between the populations.