Nicola Maffulli1, Gianni Nanni2. 1. Head of Department of Physical and Rehabilitation Medicine, University of Salerno, Azienda Ospedaliera San Giovanni Di Dio e Ruggi d'Aragona, Salerno, Italy Centre for Sports and Exercise Medicine, Queen Mary University of London, Barts and The London School of Medicine and Dentistry, Mile End Hospital, London, UK. 2. Isokinetic Medical Group, Head of the Medical Staff of Bologna Football Club 1909, Bologna, Italy.