The „WiSS“ is a modular treadmill for International Space Station and its successors and modular spacecraft. The module uses centrifugal force to simulate gravity that solves the problems in the space concerning the degeneration of muscle strenght and skeletal apparatus. There are the consequences of a failure of muscle strength, dizziness and balance disorders when you come back from space. The body has to get back used to the new, stressful situation.

For this purpose, and also with regard to planned, longer research trips to other planets of our solar system, it is important to develop methods to train the astronauts as effectively as possible. This task could take the „WiSS". Due to its modular design, it can be disconnected and re-used.