Background

Hour Movement Guidelines were developed for Canadian group with the hope of improving health and future health outcomes in children. This guidelines provide specific recommendations, include physical activity (light to vigorous), screen and sleep time, that preschoolers should achieve for a healthy day (24 h). The aim of this study was to assess adherence to 24-Hour Movement Guidelines among Portuguese preschoolers and their associations with adiposity: BMI z-scores; waist circumference and waist to height ratio.

Methods

542 preschool children (mean age = 4.9 ± 0.8 years, 46% girls) participating in the PreSlyle Project were analyzed. Children completed objectively measured physical activity and parents reported on children’s screen and sleep time. Preschoolers were classified as meeting/not meeting the overall 24-Hour Movement Guidelines if they met physical activity (≥ 180 min/day of TPA including ≥60 min/day of MVPA), screen time (≤ 1 h/day), and sleep time (10–13 h/day) recommendations. Body Mass Index z –scores was calculated according WHO growth standards.Logistic and multiple regression models assessed associations between this new guidelines and adiposity outcomes.

Results

The majority of preschool children met physical activity (94,5%) and high percentages met sleep guidelines (77,8%). Although, low proportion met screen-time guidelines (34,4%). Only 26,4% met the overall 24-Hour Movement Guidelines.Meeting only physical activity recommendations was associated with BMI z-scores (OR:3.3 IC(1.4-7.5)), with waist circumference (OR:3.2 IC(1.3-8.0)) and waist to ratio ratio (OR:4.1 IC(1.7-9.8)). No associations were observed between overall 24-Hour Movement Guidelinesand adiposity outcomes.

Conclusions

Nevertheless most children were meeting physical activity and sleep time recommendations, high percentage screen-time longer than expected. Strategies to limiting screen-time are necessary.