Zero gravity (Zero-G): what it is and why it matters

The zero gravity position, or Zero-G, is one of the most popular features of modern massage chairs. The name sounds like space travel — and that’s no accident.

Where the idea comes from

The zero gravity posture is linked to the position astronauts adopt to cope with g-forces during launch. The knees are raised slightly above heart level and the body is tilted so that weight is spread evenly along the whole back.

What you feel

When the chair moves into Zero-G, the feeling of your body pressing down on your seat and lower back disappears. Your back is unloaded, muscles relax more easily and the rollers reach deeper because your own weight presses you into the mechanism. Many people describe it as lightness or weightlessness.

One position or two

Simpler chairs have a single Zero-G position. More advanced models offer two: a moderate recline for regular massage and a deeper one for full relaxation. For example, Smartrelax has two zero-gravity positions, and Dreamliner uses a two-stage system combined with a double body scan.

Casada chairs with Zero-G

• Pollux — a compact model with Zero-G and carbon heating.
• Betasonic III — weightlessness combined with air compression.
• AlphaSonic III — Zero-G with artificial intelligence and Braintronics®.
• Skyliner III and SkyLiner II — Zero-G plus a wall-saving design.

A few tips

• Move into Zero-G gradually, especially if you are new to massage chairs.
• Combine Zero-G with heating to relax faster.
• Check how much space the chair needs behind it when reclined — see our guide on choosing a massage chair.

The best way to understand Zero-G is to feel it. Book a test drive and a consultant will show you how it works in different models. See all chairs in massage chairs.

Massage equipment is not a medical device. If you have a health condition, consult your doctor before use.