Not too long ago, the massage track within the backrest of a massage chair was a straight track that was roughly as long as your back. The problem with this design is that the human spine is not perfectly straight. This mismatch created gaps in massage pressure in the lower back and in the shoulder area, as well as really intense massage near the mid-back. Overall a very uneven massage experience.
The S-shaped massage track is designed to closely mimic the curvature of the human spine. This means your massage experience has uniform pressure from your lower back all the way up to your shoulders so that no part of your back is over or under massaged and you leave your massage chair feeling refreshed and rejuvenated. Take a look at a few S-track massage chairs below and see if any of these are the right massage chair for you!