2.1. Study Design and Sample
This was a non-randomized experimental study. The sample was selected in a non-probabilistic way, composed of 19 adolescents from elementary and high school at a public state school in the municipality of We included adolescents who were enrolled in classes from the 7th to the 9th grade of elementary school and the 1st grade of high school of the aforementioned school, males and females, aged 13–16 years. All of them filled out and signed the free and informed assent and consent forms together with their legal guardians. The exclusion criteria were: not using and/or answering at least one of the instruments employed to measure SB (accelerometer, the “Behavior of Adolescents from Santa Catarina” questionnaire and the “Questionnaire on Portable Technologies and Mobile Internet”), presenting any physical or mental condition that prevented him/her from participating in the proposed activities, and having a frequency below 70% in the physical exercise program. Adolescents were divided into an “intervention group”, which participated in the physical exercise program and health advice and a “control group”, which did not participate in the intervention and did not receive any type of recommendation. All adolescents were from the same school shift. The research was approved by the Committee for Ethics in Research on Human Beings of the Federal University of 