The invention relates to an apparatus for treatment, in particular physiotherapeutic treatment, of a part of the human body, in particular an arm, comprising a holder for fixing the body part to be treated, comprising a traction element, which acts on the body part with a predeterminable tension. Preprocessing prepares the state information to be modified. The lure composition comprises a combination of L-lactic acid, and a fatty acid from the group consisting of propionic acid, butyric acid, and valeric acid. Communication occurs between one or more server applications running on an application server and a particular communication device, such as a cell phone.