The aim of this study was to analyze the effects of strength training on sleep quality and daytime sleepiness in institutionalized adolescents (14 to 19 years of age). Thirty-one adolescents were randomly assigned in two sample groups: intervention group (IG, n = 19) and control group (CG, n = 12). Anthropometric measures were performed (height and body mass) and BMI was determined. Sleep quality and daytime sleepiness were assessed using the questionnaires, Pittsburgh Sleep Quality Index (PSQI) and Epworth Sleepiness Scale (ESE), and total sleep time by accelerometer. Physical training (2x / week) was performed for 12 weeks. The OMNI Perceived Exertion Scale for Resistance Exercise (OMNI-RES) scale was used to control the effort intensity and the exercises followed an alternate pre-follow-up.