Cofre Bolados, CristianFerrari, GersonSuárez-Reyes, MónicaQuintiliano-Scarpelli, DaianaDiaz-Peña, HelenPizarro, Tito2021-08-162021-08-162021Bolados, C.C.; Ferrari, G.; Suárez-Reyes, M.; Quintiliano-Scarpelli Dourado, D.; Diaz-Peña, H.; Pizarro, T. Muscular Strength of Upper and Lower Limbs and Self-Esteem in Chilean SchoolChildren: Independent Associations with Body Composition Indicators. Int. J. Environ. Res. Public Health 2021, 18, 361. https://doi.org/ 10.3390/ijerph18020361https://doi.org/10.3390/ijerph18020361http://hdl.handle.net/11447/4315The aim of this study was to analyze the relationship between muscular strength from upper and lower limbs with self-esteem among Chilean schoolchildren, drawing independent associations with body composition indicators. The sample consisted of 1078 schoolchildren. The muscular strength of the upper and lower limbs was evaluated using a digital dynamometer and long jump performance. The general strength index was calculated based on Z-score values. Rosenberg’s test was used to determine the level of self-esteem of participants. Body fat and body mass index were employed as body composition indicators. Boys had significantly more upper and lower strength, and a general strength index higher than girls (11.7 vs. 10.6; 109.7 vs. 97.4; 0.19 vs. −0.24, respectively). For boys and girls combined, there were no significant associations between all muscular strength variables and self-esteem. In boys, upper and lower limb strength was positively associated with self-esteem. In girls, no association between muscular strength and self-esteem was found. In both sexes, the general strength index was not associated with self-esteem. Strategies and programs that promote mental health and muscular strength among schoolchildren, specifically in boys, are neededenMuscular strengthSelf-esteemBody mass indexBody fatArticle