Ogechi Nwaokelemeh

Design and baseline characteristics of the Short bouTs of Exercise for Preschoolers (STEP) study

BackgroundMost preschool centers provide two 30-min sessions of gross-motor/outdoor playtime per preschool day. Within this time frame, children accumulate most of their activity within the first 10 min. This paper describes the design and baseline participant characteristics of the Short bouTs of Exercise for Preschoolers (STEP) study. The STEP study is a cluster randomized controlled study designed to examine the effects of short bouts of structured physical activity (SBS-PA) implemented within the classroom setting as part of designated gross-motor playtime on during-school physical activity (PA) in preschoolers.Methods/DesignTen preschool centers serving low-income families were randomized into SBS-PA versus unstructured PA (UPA). SBS-PA schools were asked to implement age-appropriate 10 min structured PA routines within the classroom setting, twice daily, followed by 20 min of usual unstructured playtime. UPA intervention consisted of 30 min of supervised unstructured free playtime twice daily. Interventions were implemented during the morning and afternoon designated gross-motor playtime for 30 min/session, five days/week for six months. Outcome measures were between group difference in during-preschool PA (accelerometers and direct observation) over six-months. Ten preschool centers, representing 34 classrooms and 315 children, enrolled in the study. The average age and BMI percentile for the participants was 4.1 ± 0.8 years and 69th percentile, respectively. Participants spent 74% and 6% of their preschool day engaged in sedentary and MVPA, respectively.DiscussionResults from the STEP intervention could provide evidence that a PA policy that exposes preschoolers to shorter bouts of structured PA throughout the preschool day could potentially increase preschoolers’ PA levels.Trial registrationClinicaltrials.gov, NCT01588392

Feasibility and Effects of Short Activity Breaks for Increasing Preschool‐Age Children's Physical Activity Levels

BACKGROUND We examined the effects of short bouts of structured physical activity (SBS-PA) implemented within the classroom setting as part of designated gross-motor playtime on preschoolers PA. METHODS Preschools were randomized to SBS-PA (centers, N = 5; participants, N = 141) or unstructured free playtime (UPA) (centers, N = 5; participants, N = 150). SBS-PA consisted of structured PA implemented in the classroom during the first 10 minutes of gross-motor playtime followed by 20 minutes of free playtime. UPA consisted of 30 minutes of unstructured free playtime. Teachers implemented both conditions for 5 days/week for 6 months. PA was assessed with accelerometers (preschool-day) and direct observation (30-minute sessions). Generalized linear mixed models were used to examine the impact of the intervention. RESULTS Regarding the 30-minute sessions, significant group main effects were observed for intervals spent at light (p < .001) and moderate-to-vigorous PA (MVPA, p < .001). Regarding the preschool-day PA, significant group by visit interaction was observed for percent time spent in total preschool-day MVPA (F (2, 254) = 3.54, p = .03). Percent of time spent in MVPA significantly decreased in both groups at 3 months and at 6 months. CONCLUSION SBS-PA can be implemented in classroom settings; however, further research is needed to examine its impact on preschoolers PA levels.