Q. What does a zero gravity chair do?

When a person is floating weightlessly in space gravity has no effect on the body. In order for a zero gravity recliner to work the body weight must be distributed equally across the chair while the recline. NASA is credited for developing the technology used in microgravity. The zero gravity position is the recommended method to sit by doctors. Leg swelling from edema or the pain of varicose veins is both conditions that can benefit greatly from resting in a zero gravity recliner. In order to alleviate strain caused by the rapid changes in gravity experienced after leaving Earth's gravitational pull the chair can be set to a zero-gravity position.