During the bed rest period, they will be required to to everything while lying down – from eating to going to the bathroom. Participants will have the ability to watch television, will be provided with reading material and other activities, while the organizers of the study are strongly encouraging people to take up online courses and learn new skills. During their rest, the volunteers will lay down with their legs slightly higher than heads in order to reduce blood flow to the extremities. This will impose muscle deterioration, akin to that experienced by real astronauts in space.