Here is a rocking chair that could help people recover faster after an operation. The Zero Gravity Rocking Chair is designed for kinetic therapy. Users are in control of the range of motion of this chair.
As ErgoQuest suggests, “studies conducted at the Medical College of Virginia have shown that kinetic therapy can dramatically speed healing in severely ill patients.” The company has a bunch of their fancy chairs and motorized workstations for businesses. You can check them out here.