“…2 Low back pain affects approximately 80-85% of people around the world during their life and in developed countries is a major cause of disability in youth and young adults, being considered as one of the greatest contributors to sick leave [3][4][5] Results obtained in longitudinal studies, meta-analyses and systematic reviews indicate that the prevalence of low back paindoes not differ much between children, adolescents, adults and seniors. 6 Specifically in adolescents, the prevalence of low back pain in different parts of the world varies between 8% and 44%, and factors such as age, level of education, social class, diet, smoking, weakness of the hip flexors, low flexibility of the hip extensors, growth spurt and even psychological factors have a close relationship with the incidence of pain symptoms in adolescents. 3,[7][8] Other factors such as improper posture while using computers, backpack weight and physical activity remain controversial.…”