The invention relates to a device (1) for training in doing splits comprises trousers made of a flexible material, provided with an inflatable sealed chamber (17) extending continuously along the crotch of the trousers, the sealed chamber (17) being arranged such as to gradually extend, during the inflation thereof, toward a "split" position in which said chamber is straight in order to mutually align the legs of the trousers such as to cause the legs to separate from one another.Un dispositif dentrainement (1) au grand écart comporte un pantalon en matériau souple pourvu dune chambre étanche (17) gonflable sétendant de manière continue le long de lentrejambe du pantalon, la chambre étanche (17) étant agencée pour, lors de son gonflage, tendre progressivement vers une position « grand écart » dans laquelle elle est rectiligne pour aligner entre elles les jambes du pantalon de sorte à provoquer lécartement des jambes lune de lautre.
