During his Cosmic Kiss mission on the International Space Station ISS Matthias Maurer will carry out 36 experiments from Germany. One of them is a special training suit for muscle stimulation based on electro muscle stimulation (EMS). This is a modern training method in which muscle areas are tensed by weak current pulses. If this increased basic tension is combined with targeted muscle training, it can significantly increase success. On board the ISS, Matthias Maurer will use a special EMS suit for the first time to improve his training programme, which consists of running, cycling and strength training.