NASA is currently looking to pay a number of volunteers $18,000 to lie in bed for 70 days. Participants will be allowed to play games, talk to friends and family members, take classes, even work remotely for their real job, as long as they do not get out of bed for the entire duration of the experiment.
The study will simulate the effects of microgravity on the human body by having the beds tilt head-down at a six-degree angle, forcing body fluids to shift to the upper part of the body and create cardiovascular conditions similar to what is seen during real spaceflight. Scientists will also be monitoring the atrophy of muscle and bone density in the subjects.
Actually, you better be pretty healthy to do this. Loss of bpne n muscle is no joke, and has always been a practical limit on the feasibility of living in microgravity for long periods.