
When it comes to massage chairs, it's what's on the inside that really counts. And if you've done any research, you've probably come across specific terms to describe the different massage technologies behind the scenes.
First, Massaging Back Nodes Are Called Rollers
Inside every massage chair, you'll find rollers on a track in the back. Some tracks extend further than others. Very inexpensive chairs will have rollers but no track, the rollers are fixed. These types of chairs create gaps in coverage, are ineffective, and sometimes painful. They should be avoided. Always look for a track that travels the massaging robot up and down the back.
Most massage chairs offer a selection of massage techniques — like kneading, shiatsu, tapping and knocking — that are carried out through the rollers. The length to which the rollers travel down your back is determined by the type of track in the massage chair, while the intensity and movements are determined by the technology.
S-Track vs. L-Track Massage Chairs vs. Flex-Track
The design of the back roller track varies from chair to chair, but will likely be categorized as either an S-Track or an L (or SL) Track massage chair.
S-Track Massage Chairs
The "S" in S-Track stands for "sinusoidal", which is just a fancy way to say "wave". These roller tracks follow the curve of the spine, moving up and down from the neck to the lower back. S-Track massage chairs allow you to lay out flatter, for superior stretching moves.
L/SL-Track Massage Chairs
L-Track massage chairs work the same way as S -Tracks but extend further down the body. The L-Track can travel down around to your glutes to the top of the hamstrings. L-Tracks cover more muscle groups for a more complete full-body massage.

J-Track/Flex-Track Massage Chairs
The unique J-Track/Flex-Track combines the best of L and S-Tracks with the track opening slightly upon reclining while allowing the mechanism to continue down to the gluteus region. The result is superior spinal decompression and a full-length neck-to-glutes massage.
Which Track is Better?
It depends on what you're looking for. If you're after optimal spinal decompression and a focus on stretching your back, the S-Track is your go-to. However, if you're seeking a more comprehensive massage experience and superior zero gravity positioning for enhanced spinal decompression, the L-Track is likely the better choice for you.
For those looking to target not just the back but also the lower back, hamstrings, and glutes, the L-Track is essential. But when it comes to more advanced options, the J-Track and Flex-Track systems take things a step further.
- The J-Track provides a deeper, more targeted massage that contours to your body’s unique curves for greater precision.
- The Flex-Track offers flexible, multi-dimensional movement, allowing for a dynamic massage experience that moves fluidly across your body for the ultimate in relaxation.
Choosing the right track is all about what fits your needs—whether it's deep tissue, full-body relaxation, or targeting specific muscle groups!
Back Mechanism Roller Technology
Back mechanism roller technology has come a long way, evolving rapidly so that today’s massage chairs feel more like your personal masseuse than just a machine. In just the past few years, the technology has advanced from basic 2D rollers to highly sophisticated 4D systems. Here’s a breakdown of your options:
2D Massage Chairs
2D massage chair rollers move in two dimensions: up and down and side to side, with a fixed depth, also known as intensity. This is commonly referred to as the rollers working on the X and Y axes. 2D technology is budget-friendly and a great entry-level option for first-time buyers or those on a budget.
3D/4D Massage Chairs
While 2D rollers operate on the X and Y axes, 3D chairs add a third dimension—forward and backward movement, often called the Z axis. This allows for up and down, side to side, and in and out motions, offering a deeper, more customized massage. When the term "4D" is used, it refers to the varying speeds of the 3D movements, mimicking the natural flow of a human massage. The third dimension for in and out movement also enables the user to adjust the intensity level.
By increasing the 3D functionality, the rollers can move further and deeper into your back. This added depth means a 3D/4D massage chair can evolve with you over time as your body becomes accustomed to deeper tissue massage and seeks even more intensity. The intensity can be easily adjusted, from gentle to deep tissue. These chairs are especially ideal for households with multiple users since everyone can adjust the settings to find their perfect level of comfort.
Syner-D Massage Chairs
The Syner-D technology takes things a step further with two individual massage mechanisms working in perfect harmony. This synchronized approach targets both the back and gluteus regions, offering therapeutic relief like never before. By combining 2D, 3D, and 4D technologies, Syner-D delivers the most advanced massage experience available today, providing unparalleled comfort and relief.
Which Technology is Better?
For a massage experience that feels truly human-like and personalized, a 3D/4D massage chair is your best choice. But if you're looking for cutting-edge, therapeutic relief with the most advanced technology, the Syner-D mechanism takes it to the next level, offering the most comprehensive and effective massage available.
Air Compression Therapy
Airbags are strategically placed throughout the chair, inflating and deflating to deliver a compression sensation that mimics the feel of real human hands. Each airbag contains multiple chambers, known as air cells, which work together to target and relieve tension in your muscles for a truly soothing experience.
Body Scanning Technology
Infinity’s TrueFit Body Scanning technology uses a combination of advanced hardware and software to precisely analyze your unique body size and shape. When you first turn on the chair, the system conducts a scan, reading your body from neck to lower back and across your width. This scan allows the chair to adjust its massage settings to fit your specific body, providing a truly customized experience. Some models even include foot scanners, ensuring the chair accommodates the length of your legs for optimal movement and comfort. This intelligent, personalized approach guarantees a massage that targets your body’s exact needs.
Weightless Zero Gravity & Inversion
Zero Gravity
Zero gravity massage chairs use a reclining position to evenly distribute body weight. Since zero gravity distributes your weight throughout the massage chair, there will be less stress placed on certain parts of your body, such as your spine and neck. As your muscles relax in the zero-gravity position, you may also experience a feeling of weightlessness. Zero gravity chairs, therefore, promote relaxation and spinal decompression. And with your feet elevated above your heart, you also benefit from improved circulation.

Inversion
Inversion massage chairs recline back below a horizontal level, to just below 180 degrees on an S-Track. This technique reverses normal gravitational forces on every part of your body, with your head down and your heels up. Inversion therapy helps with spinal correction by using gravity to gently decompress the spine bringing relief to people with back pain.
The Infinity Difference
Choosing the right massage chair is a big decision, and at Infinity, we're dedicated to helping you make the best choice for your needs. We offer a range of premium massage chairs designed to provide unparalleled relief—delivering a massage experience that rivals, and often surpasses, what you'd get from a professional therapist. Whether you're looking for a straightforward, classic model or a fully-loaded chair with cutting-edge 4D technology, Infinity has the perfect option for you. Experience the next level of relaxation and wellness with the ultimate in massage chair innovation.
Peace of Mind with Infinity
With your purchase, you’ll enjoy extensive warranty coverage, ensuring long-term satisfaction and protection. Plus, our US-based support and service teams are here to assist you every step of the way, offering reliable, accessible support whenever you need it. At Infinity, we’re committed to providing not only the best products but also the best customer experience.
Shop now for your perfect chair, or if you'd like to speak with one of our trusted massage chair specialists, give us a call at 603-910-5000, and we'll recommend the perfect brand and model for your needs.