The aim of this study was: to evaluate the effectiveness of a multicomponent pilot intervention in improving physical fitness (PF) and metabolic risk markers in children and adolescents; and examine if possible changes in PF are associated with metabolic risk markers in children and adolescents exposed to intervention. For such, a multicomponent pilot intervention was performed, consisting of sessions of physical exercise and nutrition education.The study included 35 children and adolescents (ages 7-13) divided into two groups: a intervention group (INT, n = 17) and a control one (CONT, n = 18). The sample underwent two moments of data collection (T0 and T1). The 1-hour exercise sessions were held based on an intensity above 65% of maximum HR. To assess the metabolic risk markers, analyzes of total cholesterol, HDL-C fraction, LDL-c fraction, triglycerides, blood glucose, insulin, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were conducted in T0 and T1. Physical activity (PA) was assessed by accelerometry (Actigraph, GT3-X model, Florida) for 10 consecutive days. The health related PF components were evaluated throw different tests 20m Shuttle-run Test; handgrip dynamometry (TKK 5101 tightening D; Tokyo Japan); standing feet jump Test; Abdominal Test; trunk extension test; and body mass index (BMI) was calculated. Motor fitness was assessed by coordinations Test für Kinder - KTK. To assess food consumption, a 24-hour recall was held. For statistical analysis, the t-Student test and General Linear Model (GLM) - ANCOVA for repeated measures test with post-hoc Bonferroni (p <0.05) were performed. Multilinear regressions were done to analyse associations between measured outcomes.