4D Stretch & Recovery Chair
Osaki 4D Yoga Flex Massage Chair
Most chairs leave the lower body to the air bags. The Yoga Flex adds an independent leg massager with a scissor-action mechanism that mimics walking, pulling and extending the legs to stretch the lower back, glutes, hamstrings, and knees. For runners and lifters, that’s the part of recovery a standard chair skips.
On top of the walking system sits a true 4D mechanism that moves up, down, side to side, in and out, and changes speed in real time. An AI health detector reads your body’s condition and tunes the session, so the stretch and the massage match what you’re carrying that day.
Roller System4DReal-time depth + speedAir Cells34Full-body compressionZero Gravity3-StageWeightless reclineUser Capacity280 lbMaximum user weightAir walking leg stretchAI health detection16 auto programs7 manual programs
The Technology
Four systems behind the stretch
The Yoga Flex pairs a 4D roller with a flexible track and automatic body mapping, so the pressure and the recline track your body instead of a default setting.
?4D Massage MechanismThe rollers move up, down, side to side, and in and out, and adjust speed in real time. That extra axis of movement is what lets the chair read closer to a therapist’s hands than a fixed 3D stroke.Multi-axis + variable speed?️SL-Track SystemA laser-crafted steel SL-track guides the rollers in one continuous path from the neck and shoulders down to the hamstrings, covering the full spine and lower body in a single pass.Neck to hamstrings?Body Scan TechnologyEvery time the chair powers on it scans your full body to map your shape and size, then adjusts the rollers automatically so the massage fits your back rather than an average one.Scans on every start?3-Stage Zero GravityThree zero-gravity recline stages tilt you progressively further back, spreading body weight evenly and relieving pressure points so the rollers work into an unloaded spine.Three recline stages
Why Athletes Choose This
A chair that works the legs, not just the back
?Scissor-action leg stretchAir Walking❤️AI reads your health indexHealth Detection?True multi-axis 4D rollers4D Mechanism?️34-cell full-body air massageAir Compression♨️Lumbar and calf heating75–83°F〰️Vibrating seat for hips and thighsSeat Vibration?Reflexology foot rollersFoot Massage?5-inch wall clearance reclineSpace-Saving
Built For Recovery
A closer look at how it works
Air Walking Technology
A scissor-action leg massager that mimics walking
An independent leg massager pulls and extends the legs through a scissor-action walking motion, stretching the lower back, glutes, hamstrings, and knees. A separate Revolution calf system adds three modes, Walk, Wave, and Stretch, and can layer onto any of the auto programs.
- Stretches lower back, glutes, hamstrings and knees
- Revolution calf system: Walk, Wave, Stretch
- Layers onto any automatic program
Lower-Body StretchCalf RecoveryIntelligent Health Detection
An AI that reads your body before it works on it
An onboard health-monitoring system tracks your health index, and the AI uses that data to deliver a massage tailored to your body’s condition in real time. The session adapts to you instead of running the same routine regardless of how you arrived.
- Tracks your real-time health index
- AI-personalized massage delivery
- Adjusts the program to your condition
AI-TunedAi SeriesAir & Heat
34 air cells plus heat where muscle holds tension
Thirty-four air cells positioned through the chair deliver targeted compression to move blood and ease tension across the body. Heating in the lumbar and calves, at roughly 75–83°F, warms the areas that tighten most after training so the compression goes in easier.
- 34 strategically placed air cells
- Heat in the lumbar and calves
- Approximately 75–83°F at the pads
CompressionLumbar + Calf HeatVibrating Seat
Seat vibration for the hips and thighs
A vibrating seat works the hips and thighs, areas rollers and air bags reach poorly. The vibration stimulates circulation through the seat, rounding out a massage that otherwise concentrates on the back and legs.
- Targets the hips and thighs
- Stimulates circulation through the seat
- Adds coverage rollers miss
Hip & Thigh
Full Spec Sheet
Specifications
Massage System
Roller System4D (up/down, side-to-side, in/out, variable speed)Track TypeSL-track (laser-crafted steel)Leg SystemAir walking + Revolution calf (Walk, Wave, Stretch)Air Cells34Foot RollersReflexology rollers, one per footSeat MassageVibrationAuto Programs16Manual Programs7 (Kneading, Tapping, Clapping, Shiatsu, Thumping, Rolling, Scrapping)HeatingLumbar and calves (approx. 75–83°F)Footrest ExtensionAutomatic, up to 6.5″
Smart & Comfort Features
Health DetectionAI health-index monitoringBody ScanAutomatic, on every startZero Gravity3-stage reclineControllerTouchscreen remoteAudioBluetooth speakersChargingUSB portAmbientLED lighting
Dimensions
Upright (W × L × H)30.5″ × 60.0″ × 47.0″Reclined (W × L × H)30.5″ × 65.5″ × 42″Shoulder Width21″Seat Width19.5″Minimum Door Width30.5″Wall Clearance (reclined)5″
Capacity & Power
Maximum User Weight280 lbChair Weight233 lbPower Supply110–120VRated Frequency50 / 60Hz
Packaging
Box 1 (W × L × H)32.1″ × 56.7″ × 38.6″ — 209.4 lbBox 2 (W × L × H)20.5″ × 22.4″ × 23.4″ — 61.7 lb
Questions
Frequently Asked Questions
It’s an independent leg massager with a scissor-action mechanism that simulates natural walking, gently pulling and extending the legs to stretch the lower back, glutes, hamstrings, and knees. A separate Revolution calf system adds Walk, Wave, and Stretch modes.An onboard health-monitoring system tracks your health index, and the AI uses that data to deliver a massage tailored to your body’s needs in real time.The chair supports a maximum user weight of 280 lb. The footrest extends automatically up to 6.5 inches to fit a range of heights.Space-saving technology slides the chair forward as it reclines, so it needs just 5 inches of wall clearance for a full recline.There are 16 auto programs (including Rolling Stretch, Rovo Recovery, Back Pain Relief, Lymphatic, Neck + Shoulders, and more) plus 7 manual programs: Kneading, Tapping, Clapping, Shiatsu, Thumping, Rolling, and Scrapping.The Yoga Flex comes in Black, Brown, and Taupe.The Yoga Flex includes a 5-year warranty: 3 years full service plus an additional 2 years parts.
