This research analyzed the influence of nutritional status and hydration on the physical performance of 56 adolescent soccer players (12-17 years old) from Club Deportivo A.D. Bolognesi, Loreto 2024, through a cross-sectional quantitative-observational study. The evaluation included anthropometric parameters (BMI, body fat percentage, waist circumference), pre/post training urinary specific gravity, and physical performance (ALPHA-FITNESS battery). Results revealed that 82.14% presented normal BMI, although 66.1% showed low body fat percentage. Dehydration increased significantly during training (48.2% to 69.6%). In motor capacity, 60.8% reached high/very high levels, while only 41% exceeded the medium level in aerobic capacity. Significant negative correlations were identified between waist circumference and aerobic capacity (r=-0.452, p<0.001), and between urinary gravity and aerobic p...