We recently finished a follow up study on professional dancers (nutrition, functional status, fitness, injuries, anxiety and depression, presence of GJH) and followed 168 dancers for one year), This provides information of the general population, extension towards hypermobility spectrum disorders and highlight Schepers study which they did in australia (risk profile towards different stages of disability), Than ending with research in collagen diseases in which we currently see 60 children with confirmed EDS and 90 with Marfan, who we follow for over one year. Some remarks regarding training