Sitness 5 Fitness Stool

Improve your Posture & Core in 2026 with the Sitness 5 Exercise Stool

Want to strengthen your core and improve your posture in 2026, but struggling to find time to work out? With the Sitness 5 Exercise Stool, you can do exactly that while you sit.

Designed to promote “sitting in motion”, the Sitness 5 helps activate your muscles throughout the day – whether you’re working at your desk, watching TV, or reading at home.

Special Offer, While Stocks Last – you can secure the Sitness 5 Exercise Stool in Black or Lime Green for just £120 (excluding VAT, including delivery)

Why Choose the Sitness 5 Exercise Stool?

The Sitness 5 Exercise Stool is a stylish and practical alternative to traditional exercise ball chairs. It features:

  • An integrated exercise ball seat for active sitting
  • Three-dimensional mesh fabric, available in additional contemporary colours at our standard price
  • A stable base with five solid chromed steel feet
  • Suitability for both home and office use
  • Authentic Swiss Walser “sitting in motion” patent technology
  • Alternative Models available at 640mm height on a special order
Black Sitness 5 Stool- In Stock
Black Sitness 5 Stool- In Stock

Exercise While You Sit

Unlike standard office seating, the Sitness 5 gently encourages constant micro-movement, helping to improve posture, balance, and core strength—even if used for just a few hours a day.

Using an exercise ball chair engages your core muscles naturally. As you sit, your body works to maintain balance, helping to:

  • Strengthen abdominal and back muscles
  • Improve posture and spinal alignment
  • Increase balance and body awareness

Adjustable to Suit You and Quality you Can Trust

The gentle bouncing effect of the exercise ball seat can be easily adjusted to suit your body weight. Simply add or remove air using the supplied pump for personalised comfort and performance.

Our Sitness 5 exercise stools are original German-made products, built to exceptional standards—not cheaper imitations.

Secure Yours Today

Contact us directly today to take advantage of this limited-stock offer and secure your Sitness 5 Fitness Stool at the special price of £120 (excluding VAT, including delivery). Call us on 01634 304403, or email sales@aerofoil.net

Upgrade the way you sit—and start strengthening your body every day.

Please note that the special offer price applies to ex-stock models in Black or Lime Green only. Other colours can be ordered at standard pricing.

Keeping Active and Working

Most of us are moving around much less than we used to and working from home has reduced our movements even further. Many of us haven’t been travelling to our workplaces like we used to. We are simply travelling the journey from our bedrooms, to the kitchen for hot drinks and snacks, and back to our chosen work space again, where we remain until we retire to the sofa in the evening. Of course there will be those who have strict exercise regimes, and those who choose to exercise indoors, even a simple walk around the block will help, but the reality is, things have changed.

You may now be suffering from lower back pain, or aching muscles from sitting in bad positions due to working from home, but there are many ways we can assist. Yes, correct ergonomic seating will help, but the human skeleton is not designed for prolonged sitting, and it has been proven that if you change your position throughout the day, it generally leads to a much healthier situation.

Sit-Stand, or height adjustable desks are a great way of doing this, either at home in your current home office, or in your main workplace when you return. We have various different options available, some are driven by electric motors others by crank handles. We may even be able to use your existing desktop and just supply a new frame.

What about if you could keep moving, and exercise whilst sitting and working? Fitness seating is a great way of doing this. We have this type of seating in the office ourselves and use them daily. An Exercise Ball Stool can improve your posture and balance, and also strengthen your core muscles. You could even sit on it when reading a book, or watching TV!

Aerofoil Design are happy to advise on how you can improve your movements whilst working. Visit our website or contact us so we can find a solution for you, and ultimately, improve your working life and your health.

Break Out Room Furniture

We were briefed by our customer who wanted to update the current managers room into a more suitable breakout area.

We proposed a couple of options and agreed that the best solution would be our Box Reception Seating. We installed two single and one double box sofa, in a Just Colour faux leather material in colour “Jazzberry” along with a Box Frosted Glass Coffee



To utilise the whole area properly and to give the room a more sociable feel we also supplied two Sitness 5 Fitness Stool’s with Integrated Exercise Ball in black.

Our customer was very pleased with the final result, and left us some very positive feedback:
“Just to let you know everyone at D*** are all really so pleased with the office furniture it has really helped us to utilise our office space better.”


Other Box seating we can offer

If you want to discuss how we can help utilise your office area, contact Jeff Nurse at Aerofoil Design