Physical literacy predicts the physical activity and sedentary behaviours of youth.

Objectives: This study examined the physical activity (PA) and sedentary behaviour (SB) along with the developmental progression of 2,087 Canadian students. It also examined whether their physical literacy (PL) predicts latent class affiliations and transition probabilities from grades 5 to 6 and whether this affiliation in grade 6 predicts body mass index (BMI) and self-concept by grade 7.

Design: Longitudinal observational study.

Methods: Data was collected from a longitudinal open cohort study using data from three waves of data. In grades 5 and 6 we examined patterns of PA and SB behaviour and their correlates. In grade 7 we examined outcomes associated with latent class affiliation.

Results: Our results found a validated measure of PL was a robust predictor of class affiliation and transitions between classes across grade and sex. Students with higher PL were two to four times more likely to be in the active screeners (AS) or low SB class compared to the sedentary/inactive (SI) class in both grades 5 and 6. For females, PL was also related to transitioning out of the SI class and into the AS. PL did not predict transitions out of the low SB class. Class affiliation in grade 6 also predicted BMI and self-concept in grade 7. Students in the SI class had higher BMI and lower self-concept compared to students in AS and low SB classes.

Conclusions: Future research should assess additional domains of PL and utilize objective methods to measure PA.