O8-1 24-Hour Movement Behavior and Fundamental Movement Skills in Pre-School Children: A Compositional Analysis

Abstract Background Studies that have analyzed the association between the different movement behaviors and fundamental movement skills (FMS), have considered it in an independent manner, disregarding the compositional nature of 24-hour movement behaviors (24h MB). The aim of this study was to investigate relationships between the 24h MB and FMS in low-income preschoolers. Methods Two hundred and four preschoolers of both sexes (4.5±0.8 years old; 101boys) provided objectively assessed physical activity (PA) and sedentary time (ST) data (Actigraph wGT3X), and FMS assessments (TGMD-2). Sleep duration (SD) was reported by parents through interview. Association of daily time composition of movement behaviors with FMS was explored using compositional data analysis (R Core Team, 3.6.1). Results Our data highlighted that no single movement behaviour significantly predicted locomotor, manipulative, or total motor competence. When data were considered as a 24h MB composition based on PA, ST and SD, adjusted for age, BMI and sex, the composition significantly predicted locomotor score (P > 0.0001; r2 = 0.31), manipulative score (P > 0.0001; r2 = 0.19) and total motor competence score (P > 0.0001; r2 = 0.35), respectively. Conclusion Our study suggests that the 24h MB composition is more important for adequate FMS then any individual, movement behavior. This represents an important finding, particularly for creating and optimizing interventions to benefit child health.