Pooled Analysis of Physical Activity, Sedentary Behavior, and Sleep Among Children From 33 Countries.

Area of Science:

• Pediatrics
• Public Health
• Epidemiology

Background:

• Estimates of movement behaviors (physical activity, sedentary behavior, sleep) in 3- and 4-year-olds globally are uncertain.
• Understanding adherence to World Health Organization (WHO) guidelines is critical for child development.

Purpose of the Study:

• To determine the proportion of 3- and 4-year-old children meeting WHO guidelines for physical activity, sedentary behavior, and sleep across 33 countries.
• To analyze adherence by income level and geographical region.

Main Methods:

• Pooled analysis of 14 cross-sectional studies (2008-2022) involving 7017 children aged 3.0-4.9 years.
• Accelerometry data for physical activity, parent-reported data for screen time and sleep duration.
• Meta-analysis used to estimate proportions meeting WHO guidelines (physical activity ≥180 min/d total, ≥60 min/d moderate-to-vigorous; screen time ≤1 h/d; sleep 10-13 h/d).

Main Results:

• Only 14.3% of children met all WHO guidelines for movement behaviors.
• Adherence did not show a clear pattern by income group (Low/Lower-middle: 16.6%, Upper-middle: 11.9%, High: 14.4%).
• Africa had the highest proportion meeting guidelines (23.9%), while North and South America had the lowest (7.7%).

Conclusions:

• The majority of 3- and 4-year-olds do not meet current WHO movement behavior guidelines.
• Understanding influencing factors and implementing context-specific interventions are essential.
• Promoting healthy movement behaviors in early childhood requires targeted programs and policies.