If you have ever stood up from your desk feeling stiff and sore, you are not alone. Most office chairs are designed to hold you in one good position; your body would rather have several. Active sitting is the design response to that, and this is the plain-English introduction to it. If you want the underlying research and the specific mechanisms, read the science of active sitting next.
What is active sitting?
Active sitting means using a chair that encourages continuous small movements rather than settling you into a single posture. Instead of a rigid backrest and a fixed seat, active sitting chairs use tilting, rocking or saddle-shaped seats that let the pelvis move, keep the trunk muscles lightly engaged and make it easy to change position without getting up.
The idea behind it is simple: a spine does better with variation than with stillness, however good the still position is. When you hold one posture for hours, load concentrates on the same structures. Active sitting spreads that load around by making the next position easy to reach.
Static sitting vs active sitting: what changes
In a conventional chair the hips are closed to roughly 90 degrees, the pelvis tends to roll backwards and the lumbar curve flattens — which is why so much design effort goes into lumbar support, and why so many people still end up perched on the front edge by mid-afternoon.
A saddle seat opens the hip angle to roughly 135 degrees. The thighs slope down, the pelvis tips slightly forward, and the lumbar curve is held by the geometry of the seat rather than by a pad pressing on your back. That is the whole idea in one sentence, and it is why saddle chairs feel so different in the first five minutes.
How does a saddle chair work?
The best-known active sitting chair is the HÅG Capisco 8106, designed by the Norwegian designer Peter Opsvik, whose saddle seat was drawn from the posture of a rider on horseback. Opsvik also designed the Capisco Puls and the Tripp Trapp children’s chair, and the thinking is the same in all three: build the chair so that moving is the easy option.
The Capisco pairs that saddle with a balanced movement mechanism, so you can rock forward and back and shift side to side without unlocking anything. You can sit facing forward, perch on the front edge, or sit reversed with your chest against the backrest — a position that suits close work at a bench. The variety is the point. For a lighter, more streamlined chair on the same principle, the HÅG Capisco Puls 8010 does the same job in a moulded shell.
Active sitting and staying sharp
Comfort is the obvious argument for active sitting; attention is the underrated one. Being able to change position without breaking off what you are doing means you are less likely to spend the last hour of a task negotiating with your own back. The tension that builds in the neck and shoulders when you hold one position is the same tension that makes long tasks feel longer.
If a saddle is not for you, the same movement philosophy runs through the rest of the HÅG range — the HÅG SoFi Mesh, for example, uses HÅG in Balance to keep the sitter moving in a conventional-looking chair.
Pairing active sitting with a sit-stand desk
Active sitting and height-adjustable desks are made for each other. A sit-stand desk lets you move between sitting, perching and standing, and a saddle chair covers the middle of that range better than a conventional chair can — you can raise it to a perching height and keep working with your weight partly through your feet.
Practical note: a Capisco perching position needs desk height to match. On a Capisco 8106 the standard 200 mm gas lift gives a seat height of 460–640 mm and the tall 265 mm lift gives 550–810 mm. The measurements page has the published figures for every model and lift, and our sit-stand desk buying guide covers the desk side of the decision.
What active sitting is good for
| Benefit | Why it matters |
|---|---|
| Easier position changes | Moving does not require unlocking a mechanism or standing up, so it actually happens. |
| Less static loading | Varying your posture spreads load rather than concentrating it in the same place all day. |
| Trunk muscles stay engaged | Light, continuous balancing work rather than being propped up entirely by the chair. |
| Open hip angle | A saddle seat holds the lumbar curve through geometry instead of pressure on the lower back. |
| Perching | Bridges the gap between sitting and standing, which is the position most chairs cannot do at all. |
| Sit-stand flexibility | Saddle chairs adjust up to standing-desk heights, so one chair covers the whole desk range. |
One honest caveat: if you have a diagnosed back condition, take advice from your physiotherapist or doctor about what suits you before you spend money on a chair. We sell chairs; we are not in a position to tell you what will treat a specific problem.
Active sitting vs supported sitting: Capisco and Aeron
The HÅG Capisco and the Herman Miller Aeron are the clearest illustration of the two philosophies.
| Feature | HÅG Capisco 8106 | Herman Miller Aeron |
|---|---|---|
| Design philosophy | Active sitting — makes changing position easy | Supported sitting — holds the body in one well-judged position |
| Seat | Saddle seat, open hip angle, depth adjustable 370–470 mm | Pellicle suspension seat, depth fixed by size (406, 432 or 470 mm) |
| Lumbar support | Spinal curve held by seat geometry and pelvic tilt | Adjustable PostureFit SL |
| Sizing | One frame, adjusted by gas lift choice | Three frames, sized primarily by user height (A, B, C) |
| Best for | Movers, perchers, sit-stand desk users, bench and close work | Long stretches of focused, stationary work |
Neither is better in the abstract. For a deeper comparison, read HÅG Capisco vs Herman Miller Aeron or the broader Herman Miller vs HÅG comparison.
Who should try active sitting?
Worth trying if: you fidget in ordinary chairs, you stiffen up when you hold one position, you change posture often, you work at a bench or close to your work, or you use a sit-stand desk.
Probably not if: you want to recline deeply while you work, or you have been advised to use firm consistent lumbar support. In those cases something from our task chairs range will suit you better. Either way, sitting in one for fifteen minutes settles the question faster than any article — our Pyrmont showroom is open by appointment.
The rest of the workstation
Screen height matters more once you start changing posture, because your eye height changes with it. A monitor arm such as the CBS Flo Single monitor arm lets you reposition the screen as easily as you reposition yourself.
A HÅG Capisco Footring is worth adding if you sit high — it gives your feet somewhere to go at perching height. Note that the footring fits chairs with 200 mm and 265 mm gas lifts only, and is colour-matched to the lift, so specify the two together.
Frequently asked questions
Is active sitting good for lower back pain?
Many people with desk-related stiffness find that being able to change position easily makes a long day more comfortable, and that is the argument for active sitting. We are not able to tell you it will treat a diagnosed back condition, and we will not pretend otherwise — if you have one, ask your physiotherapist or doctor what seating they recommend, and bring their advice to us. What we can do is let you sit in the chairs first.
How long does it take to get used to a saddle chair?
Most people describe a transition period of one to two weeks. Active sitting uses trunk and leg muscles that a conventional chair does most of the work for, so mild fatigue at first is normal. Start with shorter stints and build up rather than switching for a full day on day one.
Can I use an active sitting chair with a standard height desk?
You can, but you will not get the perching positions that make a saddle chair worth having. Saddle chairs work best a little higher than a conventional chair, and a fixed-height desk limits how far you can go. If your desk is fixed, check the seat height range against your desk height before ordering — or call us with the desk height and we will work it out with you.
What is the difference between the HÅG Capisco 8106 and the Capisco Puls?
The 8106 is fully upholstered, with an adjustable seat depth of 370–470 mm and an adjustable backrest height. The Capisco Puls is a lighter moulded chair — the 8010 with a plastic shell, the 8020 with an added upholstered cushion — at a lower price. They are separate chairs with separate factsheets rather than two trims of one chair: their seat heights differ slightly, and they are certified to different editions of the same standard, the Capisco to EN 1335 (2020) Type A and Ax and the Puls to EN 1335 Type A (2000). The Puls also satisfies ISO 14644 Class 4 and 5 for cleanroom use, but only with black antistatic vinyl. Full figures for both are on our measurements page.
Do active sitting chairs have lumbar support?
Not in the form of a mechanical lumbar pad. A saddle seat tilts the pelvis slightly forward, and the lumbar curve follows from that geometry rather than from something pressing on your lower back. The Capisco 8106 does have a height-adjustable backrest, but it is there to support the back or chest depending on which way you are facing, not to push a curve into your spine.
Does the HÅG Capisco have a maximum user weight?
Flokk publishes no maximum user weight for the Capisco. The 110 kg figure sometimes quoted is a condition of the ten-year warranty rather than a load rating, and we will not publish a capacity the manufacturer does not. If that is the deciding factor for you, call us and we will talk it through honestly.
Ready to try it?
The HÅG Capisco 8106 is the best-known active sitting chair in the world and is held in stock in Sydney, with delivery Australia-wide. The Capisco Puls 8010 is the lighter, lower-priced alternative on the same principle.
Chair Dinkum is the exclusive Australian distributor for the Flokk group, of which HÅG is one of eleven brands. Browse the full HÅG range or get in touch for advice on which model suits your desk and your work.
