they will be monitoring you and you have to stay in bed the whole time. eating, bathing, restroom will have to be done in bed. you will most likely be allowed to play video games, watch movies, etc while in bed
only healthy people are allowed "participants have to be non-smokers in healthy physical condition who pass the Modified Air Force Class III physical."
Re: NASA will pay you $18k to lie in bed for 70 days
The hidden agenda is that they're preparing to send about 17,000 people to another world in an attempt to terraform the land and perhaps make it human inhabitable. Cryostasis isn't a reality yet so they're testing the limits of "average" citizens to travel great distances in extremely limited space.