“…Furthermore, as already mentioned, in adolescents good cardiorespiratory fitness is positively related to body composition and metabolic syndrome in children and adolescents aged 5–19 years old [ 56 ]. Furthermore, low aerobic fitness carries negative consequences for the physical function in all age groups, such as increased metabolic and cardiac disease [ 57 , 58 ] and, in this sense, reveals the importance of keeping physically active in adolescence [ 59 , 60 , 61 ]. Additionally, keeping satisfactory aerobic fitness levels across the years is inversely related with all causes of mortality, such as cardiovascular disease, cancer, chronic lower respiratory tract diseases, accidents and injuries, Alzheimer’s disease, diabetes mellitus, influenza/pneumonia, nephritis, nephrotic syndrome, or nephrosis [ 62 ].…”