Infinity Circadian Syner-D Massage Chair - Certified Pre-Owned

Syner-D® Dual Back Massage Mechanism

Two massage mechanisms work in perfect rhythm from your neck all the way to your glutes at the same time — no area waits, and nothing is skipped.

Most massage chairs use a single mechanism that must travel up and down the track sequentially, which means your upper back receives attention only while the lower back waits, and vice versa. The Circadian’s Syner-D® technology places two independent assemblies on the same track, coordinated to work synergistically together. The result is simultaneous therapeutic coverage that feels more like the practiced hands of two therapists working your back in concert. The system integrates 2D, 3D, and 4D movement capabilities across both mechanisms, giving each roller the range of motion needed to deliver genuinely effective, human-like pressure at every point along the spine.

J-Track / Flex-Track — Full Coverage with Superior Stretch

You get the glute-to-neck coverage of an L-track and the spinal decompression stretch of an S-track in one system — a trade-off that every other track design forces you to make, solved here.

Standard L-tracks reach the glutes but sacrifice the deep spinal contour that an S-track follows naturally. S-tracks give you beautiful spinal alignment and superior stretch but stop before the glutes. The Circadian’s J-Track (also called Flex-Track) resolves this by incorporating a flexible joint that opens slightly as the chair reclines, allowing the track to maintain S-track spinal contact at full recline while still extending through the gluteal region. Spinal decompression stretch programs use this geometry to apply longitudinal traction along the entire back in a way that owners with chronic lower back tension describe as immediately and distinctly effective.

Triple Foot Roller Total Sole Reflexology

Three rows of shiatsu rollers per foot cover every pressure point from heel to toe — the broadest sole coverage available in a massage chair.

A single row of foot rollers can only address a narrow band of the sole on each pass, leaving large areas of the foot untouched. The Circadian triples the roller count per foot, ensuring that the full plantar surface — every reflex zone linked to other organs and systems in the body — receives consistent attention on every session. Combined with air compression cells working above the foot, the experience goes well beyond what a standard single-roller system can deliver.

Tuina Calf Massage with Heat

A rolling, kneading motion that mimics the sensation of human hands traveling up and down the calves — with heat applied at the same time for deeper tissue relief.

Tuina is a traditional Chinese therapeutic technique characterized by rhythmic compression that moves through the muscle length rather than simply squeezing and releasing from one fixed position. The Circadian replicates this motion in the calf section with mechanical rollers that travel along the muscle while the surrounding compression nodes hold steady warmth against the tissue. For people who spend long hours on their feet or who carry significant calf tension from athletics, this combination addresses the lower leg far more thoroughly than airbag compression alone.

Intelligent Voice Command and Control

Activate massage programs and make adjustments while fully reclined — no sitting up, no reaching for the remote.

The Circadian’s built-in voice command system recognizes spoken instructions and responds without requiring any physical interaction with the chair or remote. Once you are settled into your session, you can start a new program, increase intensity, or make other adjustments simply by asking. Voice control works alongside the tablet remote and the quick-access side panel, so you always have three ways to interact with the chair from the same position.

38-Airbag Full-Body Compression Therapy

Circulation is engaged from shoulders to feet throughout every session, continuously alongside the roller work.

Thirty-eight airbags containing 72 individual air cells are positioned across the shoulders, arms, hips, calves, and feet. Their coordinated inflate-and-release sequences deliver rhythmic compression that reduces accumulated soreness and supports healthy blood flow throughout the full body. Airbag intensity is independently adjustable so you can dial in the compression level for each zone without affecting the roller work happening simultaneously.

SootheMe™ Sound Therapy and Premium Bluetooth Speakers

Sink into your session with ambient soundscapes built directly into the chair — no phone needed — or stream your own audio through the immersive headrest speakers.

On-board nature sounds are selectable directly from the tablet remote, so you can pair the right acoustic environment with any massage program without reaching for a separate device. For those who prefer their own content, premium Bluetooth speakers built into the headrest connect to any phone or device for music, guided meditation, podcasts, or any other audio. Both systems work in concert with the chromotherapy lights to create a genuinely multi-sensory session environment.

8-Inch Touchscreen Tablet Remote with Infinity Control

Complete control over every aspect of your massage from a large, easy-to-navigate touch display — intuitive enough to use without the manual.

The 8-inch touch-sensitive tablet is the primary control interface for all massage programs, intensity settings, zone adjustments, heat, and audio. The Infinity Control feature goes beyond preset program selection and lets you build and modify a session in real time with full manual control over each parameter — width, speed, depth, and target zone — independently and simultaneously. The remote is yours to hold or set aside; the quick-access side panel and voice command handle anything you need to adjust without picking it up.

MyMassage® Memory Programs

Build the exact massage sequence your body needs, save it once, and recall it with a single tap on every future session.

The Circadian’s MyMassage® feature lets you arrange a fully custom massage sequence by selecting the techniques, zones, intensity levels, and timing that work best for you, then save that combination as your own named program. From that point, your personalized session is always one tap away on the tablet remote. Multiple saved programs let different users in the same household maintain their own preferred settings.

Soothing Lumbar and Calf Heat

Heat applied directly where the rollers and compression systems are working — at the lumbar and in the calf nodes — so your muscles are warm and receptive before and during every stroke.

Deep-penetrating heat in the lower back loosens the muscle fibers that carry the most chronic tension, allowing the Syner-D® mechanisms to work more effectively at any pressure setting. The calf heat nodes deliver the same preparation to the lower leg, so the Tuina calf massage moves through tissue that is already primed to release. Unlike a stationary heat pad applied separately, both heat sources operate continuously alongside the mechanical massage throughout the session.

Zero Wall Fit™ Space-Saving Technology

The chair slides forward on its base as it reclines, so only a few inches of wall clearance are needed — making this a practical fit for rooms where wall space is limited.

Chairs without space-saving technology must be positioned two to three feet away from the wall to allow the backrest to recline freely. The Zero Wall Fit™ system eliminates this constraint by tracking the seat forward as the backrest reclines, keeping the total wall-to-chair footprint compact at every angle. You can place the Circadian closer to the wall and still use it in a fully reclined position.

Weightless Zero Gravity Recline

Your knees rise above heart level, spinal compression drops dramatically, and every roller stroke feels deeper at the same intensity setting.

Developed originally from NASA research on how the body distributes load during space launch, zero gravity positioning distributes your weight evenly across the backrest rather than concentrating it at the lumbar. In this position the spine decompresses naturally, circulation improves throughout the lower extremities, and the full weight of the upper body presses gently into the roller mechanisms — increasing the effective depth of every stroke without increasing the intensity setting. Most Circadian owners find this is the position they spend the majority of their session in once they have tried it.

Quick Access Control Panel

All the most-used controls are right at your fingertips on the armrest — no reaching for the tablet required for everyday adjustments.

The side panel puts the most common adjustments — intensity, recline, footrest, and program shortcuts — within reach from your natural seated position. It works alongside the tablet remote and voice command rather than replacing them, so you always have the fastest path to whatever adjustment you need without interrupting the session.

TrueFit® Body Scanning and Automatic Footrest Extension

The chair maps your body before each session and automatically positions the footrest for your leg length — so the rollers always begin at the right starting point for your size.

TrueFit® scanning uses sensors built into the chair to detect your shoulder position and body dimensions at the start of every session, then calibrates the roller starting position to match your specific frame. The footrest extends automatically to match your leg length, ensuring the calf and foot systems engage at the correct anatomy regardless of your height. For households with multiple users of different sizes, this means the chair simply adjusts — no manual calibration needed between sessions.

Chromotherapy Ambient Lighting and USB Charging Port

Soft, color-shifted lighting completes the sensory environment, while a USB port keeps your device charged throughout every session.

Chromotherapy uses color to influence mood and create the kind of ambient environment that helps the mind release tension alongside the body. The Circadian’s built-in chromotherapy lights coordinate with the SootheMe™ sound therapy and your chosen massage program to create a genuinely immersive experience selectable from the tablet remote. A USB charging port located within reach of the seated position keeps any device charged during use without requiring you to get up.

Questions about the Circadian Syner-D? Our experts have helped thousands of buyers since 2005.

Call 888-612-8862

Infinity built the Circadian as the pinnacle of their lineup, and after spending time with it you can understand why. The defining feature is the Syner-D® dual back mechanism: two independent assemblies running simultaneously on the same J-Track, one working the upper back and neck while the other handles the lower back and glutes, in choreographed rhythm throughout the entire session. That is not a modest upgrade over a single-mechanism chair — it is a fundamentally different experience. Buyers who have used high-end single-mechanism chairs consistently describe the simultaneous full-back coverage as something they did not fully anticipate until they felt it.

The J-Track (also called Flex-Track) is one of the more thoughtful engineering choices in the Circadian’s design. Every other track format forces a compromise: S-tracks offer superior spinal stretch but stop before the glutes, L-tracks reach the glutes but lose the spinal contour benefits. The Circadian’s flexible-joint track opens on recline to maintain the contact geometry of an S-track at full recline while still extending through the gluteal region. In practical terms this means spinal decompression stretch programs can do their job properly without sacrificing lower coverage.

The lower body treatment is unusually thorough for a chair whose signature feature is the back mechanism. Triple foot rollers per foot — three rows, heel to toe — cover the full plantar surface rather than the narrow band a single roller can address. The Tuina calf massage uses a traveling-roller motion that moves through the calf muscle length rather than simply squeezing in place. Lumbar and calf heat operate continuously alongside both systems. Thirty-eight airbags and 72 air cells provide full-body compression at the shoulders, arms, hips, calves, and feet. The Circadian does not shortchange the lower body to focus on the back.

For control, the Circadian gives you three paths: the 8-inch tablet remote with Infinity Control for complete custom session building, the quick-access side panel for everyday adjustments without picking up the remote, and voice command for hands-free operation while fully reclined. The SootheMe™ on-board soundscapes, premium Bluetooth headrest speakers, and chromotherapy lighting round out a multi-sensory session environment that goes considerably beyond what most chairs offer. Call us at 888-612-8862 and we will tell you directly whether this chair fits what you are looking for.

What We Love

• Syner-D® simultaneous dual back coverage — Upper and lower back massaged at the same time, continuously. The difference between this and a single mechanism that travels back and forth is immediately noticeable from the first session.
• J-Track resolves the S vs L trade-off — Full glute coverage and superior S-track spinal stretch capability in one flexible-joint system. Stretch programs work properly because the track geometry supports them throughout the full recline range.
• Triple foot rollers — broadest sole coverage available — Three rows of shiatsu rollers per foot cover every pressure point from heel to toe. A meaningful step above single or dual row systems.
• Tuina calf massage with heat — A traveling kneading motion through the full calf muscle with heat applied simultaneously. Far more thorough than airbag-only calf treatment.
• 6 massage techniques including 4D Shiatsu — The Sync and 4D Shiatsu modes in particular stand out for their human-like pressure delivery. Every session can feel completely different.
• Three-way control — tablet, side panel, voice — However you prefer to interact with the chair from a reclined position, there is a natural path available. The Infinity Control feature makes real-time session customization genuinely accessible.
• SootheMe™ + Chromotherapy — full sensory environment — On-board nature sounds, premium Bluetooth speakers, and ambient lighting work together to create a session experience that goes well beyond the physical massage.
• TrueFit® automatic body scanning and footrest extension — Adapts to each user at the start of every session. No manual recalibration between household members of different heights.
• MyMassage® memory programs — Build your ideal session once and recall it with one tap. Works well for multi-user households where each person has different preferences.

Worth Knowing

• Optimal height range is 5’4”–6’6” — The TrueFit® body scanning and extendable footrest accommodate a wide range of users, but the chair is engineered for optimal fit within this height range. If you are outside this range, call us at 888-612-8862 before ordering and we will give you a straight answer about fit.
• Maximum user weight is 300 lbs — Worth confirming before ordering if you are near this limit.
• The dual mechanism delivers a full massage experience even at moderate settings — Because two assemblies are working simultaneously throughout the full back, even moderate intensity settings produce a thorough, meaningful session. If you are looking for a purely passive or feather-soft experience, this chair delivers more than that by design. If in doubt, call us at 888-612-8862 and we will help you determine whether the fit is right.

Our Verdict

The Infinity Circadian Syner-D is Infinity’s most complete chair, and it shows. The Syner-D® dual mechanism is not a spec on a feature list — it is a qualitatively different back massage experience. The J-Track resolves a long-standing engineering compromise in the category. The lower body treatment — triple foot rollers, Tuina calf massage with heat, and 38-airbag full-body compression — stands up to the quality of the back work rather than serving as an afterthought. Best for buyers who want the most thorough simultaneous back coverage in the Infinity lineup, active recovery users who need real lower-body treatment alongside back work, and anyone who has found single-mechanism chairs unsatisfying. Look elsewhere if you prefer a purely gentle experience or if a minimal footprint is your primary concern.

Call 888-612-8862

Tell us what you need and we’ll narrow it down in about 2 minutes.

The Back-Focused Buyer Who Has Tried Other Chairs

You have used other chairs and found that the upper back gets attention only while the lower back waits, or that the neck and glutes never seem to be worked at the same time. The Syner-D® dual mechanism directly solves that problem — both areas receive continuous, simultaneous attention throughout the full session.

The Active Recovery User

Triple foot rollers, Tuina calf massage with heat, and 38-airbag full-body compression give you the lower-body recovery treatment that athletes and active people need, running alongside the full dual-mechanism back work. Everything happens in the same session at the same time.

The Multi-Sensory Wellness Seeker

If you want a massage session that engages the full senses — touch, sound, and ambient environment together — the Circadian’s combination of SootheMe™ sound therapy, premium Bluetooth speakers, and chromotherapy lighting creates a session experience that is significantly richer than a purely mechanical chair.

When to Consider a Different Chair

If you prefer a very gentle massage at the lowest settings, a single-mechanism chair with a wider low-end intensity range may be a more comfortable fit. The Circadian’s dual mechanism delivers a genuinely thorough experience even at moderate settings.

If you want similar dual-mechanism back coverage in the Infinity lineup at a different price point or feature level, the Infinity Luminary Syner-D is worth a direct comparison. For buyers whose priority is advanced health monitoring and American manufacturing, the Luraco i9 Max Plus is a meaningful alternative worth a conversation. Call 888-612-8862 and we will walk through the differences in about two minutes.

Not sure if the Circadian Syner-D is the right chair for you?

Our experts have helped thousands of buyers since 2005 — tell us what matters to you, and we’ll narrow it down in about 2 minutes. Call 888-612-8862 or chat with us now.

Researching massage chairs takes time.

Our experts have helped thousands of buyers since 2005 — tell us what matters to you, and we’ll narrow it down in about 2 minutes. Call 888-612-8862 or chat with us now.