However there are some requirements for the volunteers, that must be met – they must be between the age of 24 and 55, healthy and speak German. The research will begin in September and will take up a total of 89 days, as before their time in bed, the participants will be given five days of familiarization. Upon completion of the 60 days bed-bound study, they will undergo 14 days of rehabilitation, the same as the real astronauts do.