This section addresses the Stretch or Extend programs found on any quality full body massage chair.
The Stretch program is one of the features that helps with spinal decompression, which relieves the pressure between the discs.
Theoretically, the advantage of the S-Track design is that the Stretch program can provide the user with a more effective stretch than that of an L-Track, because the backrest is a separate component from the seat, giving the design a greater range of motion.
This however, does depend on the model, because the effectiveness of some S-track stretch programs, is comparable to some of the L-tracks out there.
The advantage of an L-Track, is that the roller mechanism has a substantially longer reach, traveling under the seat and relaxing more of your muscles and connective tissues.
They both should have a waist twist/sway program, and when combined with the roller massage and stretch program, the muscles and connective tissues in the lower back relax, promoting the movement of oxygen, water, and nutrients into the lower lumbar region.
For best results, drink plenty of water after your session.