Massage chairs use different ways to keep you relaxed and stress free. Some of them use vibrations to massage your back, neck and feet and are the most basic kind. Ones with rollers mimic the feel of a human hand, their motion though sometimes is limited. They might either move up or down, or right or left. A few might offer all these motions in the form of rotations. Water based chairs and ones that use airbags are quite common as well.