Introduction: Swimming is a comprehensive sport that combines mechanical, physiological, and pedagogical aspects. Its systematic practice develops physical and perceptual skills, positively impacting performance. Training focuses on physiological, technical, tactical, and psychological preparation, adapting the body to the sport's demands. Anthropometry is crucial for evaluating and guiding swimmers' development toward specialization. Objective: To analyze the anthropometric characteristics, somatotype, and lower limb performance level in young Chilean swimmers. Methodology: Through simple random probabilistic sampling, 25 swimmers from Chile, with an average age of 12.67±2.132 years, height of 164.17±14.968 cm, and body weight of 56.53±12.34 kg, participated. They underwent three tests: anthropometric analysis, jump performance test (CMJ), and flexibility assessment. Results: The findings indicate that, although significant differences exist in the anthropometric profile between male and female swimmers, both groups share characteristics that favor swimming performance. Males exhibit greater arm span (p<0.01) and body mass (p<0.05), while females show a more balanced physical development. Both groups demonstrate an appropriate height-to-arm span ratio (p<0.05), which is essential for water efficiency. Conclusions: The variability in physical characteristics between genders suggests that a personalized approach could be key to optimizing individual performance. Adapting training to anthropometric specifics, such as height, weight, limb length, and body composition, could maximize each swimmer's potential.