4.5 Article

A Mediation Analysis of the Association between Fundamental Motor Skills and Physical Activity during Middle Childhood

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CHILDREN-BASEL
卷 8, 期 2, 页码 -

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MDPI
DOI: 10.3390/children8020064

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motor competence; obesity; physical fitness; physical activity; middle childhood

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This study examined the associations between fundamental motor skills, health-related fitness, and physical activity in middle childhood. It found that fundamental motor skills were related to all components of health-related fitness, with the relationship between motor skills and physical activity being fully mediated by health-related fitness in both directions. Maintaining appropriate levels of health-related fitness may play a key role in understanding the obesity trajectory during middle childhood.
The purposes of the study were: (1) to investigate the associations between fundamental motor skills (FMS), health-related fitness (HRF) and physical activity (PA) during middle childhood; and (2) to examine whether HRF serves as a mediator in these pathways. The participants were 342 children (156 girls; Mage = 8.40, SD = 0.50) recruited in Texas. Children's FMS (locomotor and ball skills) were assessed. School-based PA that included light, moderate, and vigorous PA was captured by accelerometers. The FITNESSGRAM battery was used to measure children's HRF, including body composition, cardiorespiratory fitness, and muscular fitness. Structural equation models were used to evaluate two proposed models (model-1 = FMS HRF PA; model-2 = PA HRF FMS). Both locomotor and ball skills were associated with all components of HRF (p < 0.01), but not PA. The SEM analyses supported associations between FMS, HRF and PA, with sound goodness-of-fit indices: (1) model-1: CFI = 0.95; RMSEA = 0.072; and (2) model-2: CFI = 0.95; RMSEA = 0.071, respectively. The relationship between FMS and PA was fully mediated by the HRF in both directions. The behavioral mechanism (e.g., maintaining appropriate levels of HRF) provides meaningful insights to understand the obesity trajectory during middle childhood.

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