A Lift chair is a comfortable reclining chair that will assist the sitting person get to a standing position. Two-position lift chairs recline from a 90 degree sitting position to 45 degrees. Three Position lift chairs recline to just about a horizontal position. An InfinitePosition lift chair will recline to a true horizontal. A Zero-Gravity and Trendelenburg chair correctly aligns the spine, relaxes muscle tension and improves circulation and expands lung capacity by raising the legs higher than the back and head.