Ergonomics and Health: Why a Stressless Is an Investment in Your Body

On average, we spend 8.3 hours a day sitting still. An ergonomic recliner is good for your body because it doesn’t restrict you during those hours: the backrest and headrest follow the natural S-shape of your spine and move with every change in posture, so that pressure points shift and your muscles remain slightly active.

Why Sitting Too Much Is Bad for Your Body

Sitting still for too long puts a strain on your body because your posture, muscles, and blood circulation remain inactive for hours on end. With an average of 8.3 hours of sitting per day, we spend more than half of our waking hours sitting: at a desk, in the car, and on the couch. Research shows a link between prolonged inactivity while sitting and an increase in lower back pain. The problem isn’t sitting itself, but rather sitting without moving.

How prolonged sitting affects your posture

If you sit still for a long time, you’ll inevitably slump. Your pelvis tilts backward, and your back takes on a “C” shape instead of its natural “S” shape. This puts more pressure on your lower back and the intervertebral discs, while your neck and shoulders start to slump forward. Your muscles maintain that posture for hours without any variation. Over time, this contributes to stiffness and back pain.

Why Moving While Sitting Makes a Difference

The best sitting posture is the one described below. Small, regular changes in posture shift the pressure points, keep the muscles slightly active, and stimulate blood circulation. People who keep moving while sitting put much less one-sided strain on their backs than those who sit in exactly the same position all evening. That is exactly what the Stressless design addresses.

Stressless's unique movement mechanism

Every Stressless is built around a single idea: the chair adapts to your body, not the other way around. While a traditional chair keeps you fixed in one position, a Stressless moves with you as your posture changes. Three systems make this possible: the Plus™ system, the Glide system, and BalanceAdapt™.

The Plus™ System: The backrest and headrest move automatically in sync

The Plus™ system automatically adjusts the backrest and headrest as soon as you change your posture. When you lean back, your lower back remains supported and the headrest tilts along with you, keeping your head in a comfortable position for reading or watching TV. When you sit upright, the same system provides targeted support for your lower back. You don’t have to adjust anything—it happens automatically, in any position.

The Glide System: Your body weight determines the movement

The Glide system allows the chair to respond to your body weight and movements through glide wheels on either side of the seat. Without any levers or buttons, the chair glides into the position that best suits your posture: upright when reading, reclined when relaxing. The glide wheels are adjusted to your weight during the fitting consultation, so the resistance feels just right.

BalanceAdapt™: a subtle rocking motion for total balance

BalanceAdapt™ adds a gentle, rocking motion to that. The seating area automatically adjusts to every movement of your body, so you’re never sitting rigidly still but constantly maintain a subtle balance. These micro-movements feel natural—like a gentle rocking—and ensure that your body remains gently active even while you’re relaxing.

Why Active Sitting Is Healthier Than Sitting Still

Sitting actively is healthier than sitting still because small movements do what a static posture cannot: stimulate blood circulation, relieve pressure points, and keep muscles lightly engaged. In a Stressless, this happens automatically. Every time you shift your position, stretch your legs, or lean back, the chair moves with you and changes the pressure distribution on your back, pelvis, and legs. Your muscles constantly make tiny adjustments instead of holding the same tension for hours. This can help reduce stiffness and promote a more relaxed posture after sitting.

It’s important to be honest: an armchair is no substitute for physical activity. Standing, walking, and exercising remain essential. But for the hours you do spend sitting, moving along with the chair is a healthier alternative than staying still.

Ergonomic Design: How the Shape Supports Your Back

The ergonomic design of a Stressless follows the natural S-shape of the spine. The backrest fills the curve of the lower back, the upper back has plenty of room, and the headrest supports the weight of your head and neck. The seat depth is also tailored to the length of your thighs, so that the backs of your knees remain unobstructed and your feet are well supported.

Form and motion work together in this regard: the design ensures that you’re well supported while sitting, and the motion mechanism ensures that this support is maintained in every position. Whether you’re sitting upright reading or leaning back completely, your back retains its natural curve. This construction is the same across the entire line, from a compact model to a Stressless Mayfair: only the design and dimensions differ.

Why the Right Size Is Crucial for Health Outcomes

The ergonomic benefits of a Stressless chair are only fully realized when the chair is the right size. That’s why most models are available in three sizes: S, M, and L. In a chair that’s too large, your lower back won’t reach the lumbar support, and the seat will press against the backs of your knees. In an armchair that’s too small, the headrest will be too low, and your shoulders and neck won’t get enough support. Choosing the wrong size can actually contribute to poor posture. The table provides the recommended guidelines for each size.

The body heights listed are approximate. Your weight, the ratio of your torso to leg length, and your sitting habits also play a role. If you’re unsure whether to choose one size or another, trying out different seats with expert advice will give you the definitive answer.

Why Personal Advice from a Specialist Is Essential

It’s best to try on a Stressless in the store, because your height, weight, and sitting habits all work together to determine the right size and the right settings. The Glide system must be adjusted to your weight, the size must match your build, and the model must suit how you use the chair: reading a lot, watching TV, working, or napping. A model that’s not recommended for you largely negates the health benefits, no matter how good the chair itself may be.

Our paramedically trained consultants in Leuven and Antwerp specialize in this area. As the only two official Stressless brand stores in Belgium, we showcase the full range of recliners and take the time to help you try them out, adjust them, and provide honest advice.

For whom is an ergonomic Stressless chair a worthwhile investment?

An ergonomic Stressless is, above all, an investment for those who spend many hours sitting. This includes people with sedentary jobs and those who work from home, people who enjoy reading or watching TV for long periods, older adults looking for extra comfort and support when sitting and standing up, and anyone who spends a lot of time on the couch in the evenings. For those who already have back or neck pain, a properly adjusted recliner can be a welcome addition to their daily routine. However, if you have existing or persistent symptoms, seeking professional medical advice should always be your first step: a recliner provides support, but it does not treat the underlying condition.

Sustainability as Part of Health Care Investment

An investment in health must also be a sustainable investment, and that’s what a Stressless is built on: a good recliner lasts 15 to 30 years. Each armchair is made in Norway using sustainable materials and a construction that can withstand years of intensive daily use. Parts are repairable, and the timeless design will last for generations without looking dated. If you spread the purchase price over all those years of daily use, the investment per day turns out to be surprisingly small.

Exactly how long your chair will last depends mainly on the upholstery: the leather or fabric wears out sooner than the mechanism. You can read about what determines the chair’s lifespan and what the warranty covers in the article “How Long Does a Stressless Chair Last?” If you want to keep the leather in top condition, you’ll find instructions in our article on caring for Stressless leather; the product itself is included in our leather care kit. In other words, you’re not just buying a chair for the next few years, but daily comfort and support for the long term—good for your body and your wallet.

Ergonomics in Your Daily Life: More Than Just Relaxation

The ergonomics of a Stressless work all day long, not just when you’re relaxing. When watching TV, the headrest tilts along with you as you lean back, so you can continue to see the screen comfortably. When reading, the Plus™ system supports your lower back, helping you maintain a more upright posture. For a nap, you can lean back completely while your neck remains supported. And if you work from home, choose a Stressless office chair: it features the same motion mechanism, mounted on a base with casters, so you can keep moving while you work. This way, the same ergonomic philosophy becomes the common thread throughout your entire day.

Come try it out for yourself in Leuven or Antwerp

You can only truly experience comfort when you sit down. In Leuven and Antwerp—Belgium’s only two official Stressless brand stores—the full product line is available, and advisors with paramedical training will work with you to determine the right size.