The general purpose of the present invention, is to provide a new type of athletic equipment to be utilized for the exercise of abdominal and oblique muscles of the human body and has features such as adjustable hand and feet holds, as well as adjustable shoulder guards to provide the user with a form fit. To produce such a device, which on insertion can be conformed individually to the size and shape of the stoma or fistula and produce a suitable seal, in accordance with the invention, the tubular body has an outer surface which can be conformed to the shape of a fistula to be sealed and an inner surface which is essentially stable in shape. The decompressed data creation device decompresses the compressed data in partial units.