I attend a pain management group once a week. The facility where my group is held has a therapy and meditation room. In the room they have a massage chair. This chair does everything. It can massage your body from head to toe, has varying degrees of pressure and different type of massage techniques ie: knuckles, fingertips, rollers,etc. I have use this chair twice, both with the same result. Initially I feel great afterward, but by later in the evening and throughout the night I am in misery from extreme muscle spasm and cramps. My guess is my muscle don't like being stimulated and massaged! I think I'll avoid that chair from now on!