Accelerometry-measured physical activity and sedentary behaviour of preschoolers in Nova Scotia, Canada

Objective: To describe the levels and bouts of physical activity (PA) and sedentary behaviour (SB) among preschoolers in Nova Scotia, Canada, and the proportion meeting PA and step guidelines. Methods: Children (75 boys, 49 girls; mean age = 4.2 (range = 3-5 years)) participating in the Physical Literacy in the Early Years (PLEY) study provided data. Average time (minutes, % of day) spent sedentary, in light PA (LPA), moderate-to-vigorous PA (MVPA), and total PA (TPA), average frequency and duration of bouts of MVPA (≥ 5 minutes, ≥ 10 minutes) and sedentary bouts (≥ 10 minutes), per day were determined using published cut-points, using 15-s epochs. The proportion of children meeting PA and step guidelines was determined, and differences by sex and season explored. Results: Children spent the majority (70.8%) of their day active; nearly all (≥97%) met PA guidelines. Most children met step guidelines on a weekly basis, but not daily. Only LPA differed by sex (> girls; p=0.001). Little time was spent in sustained SB (bouts ≥10 minutes). Boys had greater and longer bouts of MVPA, and spent more of their day in these (pThe accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author