IJCS | Volume 31, Nº3, May/ June 2018

200 Claudio Gil Training-induced cardiac remodelling in youngters International Journal of Cardiovascular Sciences. 2018;31(3)199-200 Editorial This is an open-access article distributed under the terms of the Creative Commons Attribution License it would be more important to investigate whether any cardiac morphofunctional aspect obtained on the initial assessment could predict who would be able to complete such a rigorous physical training. Finally, amore detailed assessment of some other cardiac aspects, such as right ventricular function and structure 4 and the occurrence of arrhythmias (particularly the supraventricular ones), would be interesting. 5 Briefly, Dinis et al. 1 are to be congratulated on the relevance of the subject studied and the results obtained, from which it is worth noting that more than 700 hours of high-intensity physical training for 35 weeks caused no morphostructural damage to the heart of healthy young individuals. Such data corroborate the increasingly prevalent impression that, at least from the cardiac viewpoint, it seems unlikely that healthy individuals can reach the true “over-exercise” point that can harm their hearts. 6 The truly deleterious factor for health is a sedentary lifestyle, and, thus, cardiologists and particularly those interested in exercise and sports cardiology should focus their attention and priority on sedentary individuals or those who exercise insufficiently or incompletely rather than on the extremely rare individuals who, due to a personal option, choose to exercise as much as four hours a day. 1. Dinis P, Dores H, Teixeira R, Moreno L, Mónico J, Cachulo MC, et al. Additional cardiac remodelling induced by intense military training in athletes. Int J Cardiovasc Sci. 2018; 31(3):209-217. 2. Araujo CG. Componentes aeróbico e não-aeróbicos da aptidão física: fatores de risco para mortalidade por todas as causas. Revista Factores de Risco. 2015;35(1):36-42. 3. Araujo CG, Scharhag J. Athlete: a working definition for medical and health sciences research. Scand J Med Sci Sports. 2016;26(1):4-7. 4. Scharhag J, Thunenkotter T, Urhausen A, Schneider G, Kindermann W. Echocardiography of the right ventricle in athlete's heart and hearts of normal size compared to magnetic resonance imaging: which measurements should be applied in athletes? Int J Sports Med. 2010;31(1):58-64. 5. Ricci C, Gervasi F, Gaeta M, Smuts CM, Schutte AE, Leitzmann MF. Physical activity volume in relation to risk of atrial fibrillation: a non-linear meta-regression analysis. Eur J Prev Cardiol.2018 Jan 1:2047487318768026 [Epub ahead of print] 6. Araujo CGS, Castro CLB, Franca JF, Souza-Silva CG. Aerobic exercise and the heart: discussing doses. Arq Bras Cardiol. 2017;108(3):271-5. References