Effects of Physical Activity Interventions on Anthropometric, Body Composition, and Physical Fitness Indicators in Chilean Children and Adolescents: Systematic Review and Meta-Analysis

Background/Objectives: Physical activity interventions are widely implemented to promote health during childhood and adolescence; however, their effects on anthropometric, body composition, and physical fitness outcomes among Chilean pediatric populations remain unclear. This systematic review and meta-analysis aimed to determine the effects of physical activity interventions on these outcomes in Chilean children and adolescents.

Methods

PubMed, Scopus, and Web of Science were systematically searched from inception to 30 May 2026, supplemented by Google Scholar and reference-list screening. The review followed the PRISMA 2020 guidelines and Cochrane recommendations and was registered in PROSPERO (CRD42023398677). Random-effects meta-analyses were conducted using standardized mean differences (SMDs) and 95% confidence intervals (CIs).