Introduction: It has been shown that there is a close association between sleep quality and pain. In young athletes, sleep disorders and pain have a particularly high prevalence; however, the relationship between them has not been widely studied. Objective: To study the association between sleep quality and pain in young athletes. Methods: A cross-sectional study was conducted in which 71 young amateur athletes (39 males) were included. The mean age was 16.9 ± 1.2 years, with 6.5 ± 3.2 years of sports practice and 5.2 ± 1.2 hours of training per week. Sleep quality was evaluated using the Pittsburgh Sleep Quality Index (PSQI). The participants were classified according to sleep quality, as PSQI-I = without sleep disorders, PSQI-II = requiring medical assistance and PSQI-III = requiring medical assistance and treatment. Also, pain intensity was assessed on the Numerical Rating Scale, both at rest (NRSr) and during sports activity (NRSs), along with pain duration. Results: The individuals classified as PSQI-III presented higher NRSr (Mdn = 2.0; IQR = 4.0 vs. Mdn = 0.0; IQR = 2.0; p = 0.04) and higher NRSs (Mdn = 4.0; IQR = 5.0 vs. Mdn = 0.0; IQR = 2.0; p = 0.03) than the individuals classified as PSQI-I. No differences were observed in relation to pain duration. The PSQI score was positively but weakly associated with NRSr (rs = 0.24, p=0.046) and NRSs (rs = 0.27, p = 0.03) but not with pain duration. Conclusion: Young athletes with lower levels of sleep quality show higher levels of pain at rest and during sports practice. Therefore, sleep quality and pain should be considered in the routine assessment of young athletes, by technical and health teams. Level of evidence III; type of study: Cross-sectional .

RESUMEN: La antropometría es un instrumento clave para determinar cambios producidos por el entrenamiento y la edad, así como una herramienta para detectar talentos deportivos. El objetivo de esta investigación fue describir las características antropométricas de basquetbolistas varones seleccionados chilenos sub-14 durante el año 2017. Se evaluaron 28 deportistas con una edad promedio de 14.14 ± 0.36 [13.33-14.63] los cuales participaron del proceso de concentración de la Selección Nacional. Se evaluaron 25 variables antropométricas. Se calculó la composición corporal pentacompartimental, el somatotipo y la proporcionalidad. Se utilizó estadística descriptiva para la caracterización de los deportistas. Se encontró que los basquetbolistas sub-14 chilenos presentan un porcentaje de masa muscular elevado, un somatotipo mesoectomórfico y proporciones (score Z) negativas respecto a su altura.