KOS Extend M 100 Chair | Ergonomic Office Chair
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The KOS Extend M office chair is engineered for peak precision and performance.
It's intelligent design will optimise your posture and breathing, so you will always feel alert and preform at your best.
We stock Black. For any other colour options contact sales@kos.ie.
This chair complies with all EN 1335 standards
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Posture Tips & Improved Ergonomics
Sitting for long periods can often lead to discomfort or pain, especially in areas like your hips, lower back, and tailbone. Here are some simple, effective tips to help improve your posture and reduce common issues like hip pain when sitting, lower back pain when sitting, and tailbone pain when sitting.
1. Support Your Lower Back
If your lower back hurts when sitting, it's often due to a lack of proper support. Make sure your chair has good lumbar support to keep your spine aligned. You can also use a small cushion to provide extra support if needed.
2. Keep Your Hips at the Right Angle
When your hip hurts when sitting, it may be due to poor alignment. Your hips should be level with or slightly higher than your knees. Adjust your chair height so your feet are flat on the ground and your knees form a 90-degree angle. This can help reduce hip joint pain while sitting and prevent buttock pain when sitting and lying down.
3. Adjust Your Seat Position
For those dealing with coccyx pain when sitting or a sore tailbone from sitting, ensure your seat isn’t pressing too hard on your tailbone. Try a cushion with a cut-out section to relieve pressure on the tailbone and improve comfort.
4. Move Regularly
If you feel buttock ache when sitting or hip discomfort when sitting, it's a sign that your body needs a break. Stand up, stretch, or take a short walk every 30-60 minutes. Regular movement can ease tension and prevent hip ache when sitting or lower back pain while sitting.
5. Exercise for Strength and Flexibility
A good workout for back pain can strengthen your core and back muscles, reducing discomfort. Exercises like gentle stretches or yoga can help relieve bottom pain when sitting, butt pain while sitting, and improve overall posture.
By following these posture tips and incorporating ergonomic tips into your daily routine, you can reduce discomfort and improve your overall well-being while sitting. Make sure to listen to your body and adjust your workspace as needed to stay comfortable throughout the day.
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This office chair is engineered for peak precision and performance. Its intelligent design will optimise your posture and breathing, so you will always feel alert and preform at your best.
The movement of the chair is based on the principles of upright posture and active sitting. This ensures that your body receives the variation and support it requires as you move.
- Movement And Support:
- The Extend M Office chair offers a backrest and seat angles that move simultaneously when you change your position. As the chair’s basic settings do not change, this helps you to do more and perform better.
- The Extend chair is also available in other models, with a larger back rests and with a back angle adjustment.
- The backrest on the Extend M is equipped with a ”Tvedts” cushion, providing superb support for the whole upper body. The shape of the backrest encourages movement and the height is adjusted with the simple push of a button.
- Adjustability:
- The controls for the height and depth of the seat are all conveniently located on the right-hand side of the chair. The correct height improves blood flow in the legs while the correct seat depth provides greater comfort and support. The tilt mechanism is infinitely adjustable, with a smooth action that can be locked in any chosen position.
- Dynamic seating means the chair follows your every movement regardless of working position providing complete support, enabling you to always sit correctly and breathe properly.
The seat provides excellent support and has a waterfall edge to reduce pressure on the underside of the thighs, aiding circulation. It is also designed to keep you positioned in the middle of the seat, even when it is inclined forward.
The resistance of the tilt mechanism is simply adjusted according to body weight and height. This allows this office chair to follow your movements without the need to exert muscular force to push the chair into new positions.
Armrests are optional but are recommended since they provide relief for the shoulders. They are adjustable in width and depth with a rotating function.
Frequently Asked Questions
A: This is an online ergonomic training course designed to teach participants how to assess Visual Display Units (VDU) / Display Screen Equipment (DSE) safely and in compliance with Irish and European health & safety regulations. It covers workstation assessments, ergonomics, and MSD prevention.
A: This course is suitable for anyone responsible for workplace safety or office ergonomics, including:
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Health & Safety managers or consultants
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Health & Safety representatives
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Occupational health professionals
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Facilities management staff
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Architects involved in office design
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Office managers and business owners
A: No. This beginner-friendly online DSE/VDU course is suitable for anyone, regardless of prior ergonomics or health & safety experience.
A: The course is fully online via Microsoft Teams, featuring interactive lectures, group exercises, explainer videos, polls, and practical workstation assessments.
A: The course runs for 1 full day (9am–5pm) with breaks.
A: The course is delivered by highly experienced ergonomic and health & safety professionals from KOS Ergonomics, who work with leading Irish companies to reduce workplace risks and improve office ergonomics.
A: Yes. Participants who successfully complete the theory exam and practical assessment will receive a KOS Training Academy Level 1 VDU / DSE Assessor Certificate.
A: You’ll need a computer or tablet with a camera, microphone, and stable internet connection. A typical home or office workstation is sufficient for the practical exercises.
A: Key topics include:
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Ergonomics and anthropometrics for office work
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Hazards and risks associated with VDU/DSE use
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Legal requirements under Irish and EU legislation
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Workstation setup, environmental factors, and emerging trends (hot-desking, sit-stand desks, home working, laptop/tablet use)
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Practical assessment and evaluation techniques
A: Yes. The course covers Regulation 72 of the 2007 Safety, Health & Welfare at Work Regulations, along with European Directive 90/270/EEC to ensure compliance for all EU countries.
A: Absolutely. By training staff as certified VDU / DSE assessors, your organisation can reduce musculoskeletal disorders (MSDs), improve employee wellbeing, and ensure compliance with legal obligations.
A: Yes. Participants have access to KOS Ergonomics’ expert advice and resources for any follow-up questions related to workstation assessments or ergonomics.
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