KOS Logic 400 Chair No Arms | Back Care Ergonomic Chair
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Highly Adjustable Back Care Ergonomic Chair - Perfect For Back Pain
Designed to envelope the user and provide the ultimate seating experience, the Logic 400 is ideal for those who work for extended periods seated.
An excellent option for those looking for an ergonomic chair that can aid circulation and provide robust back support.
The RH Logic 400s fluid mechanisms ensure you have a constant stable base when seated, keeping your feet in contact with the floor. This helps to alleviate any pressure on the underside of the thighs, encouraging proper circulation.
The RH Logic 400 is the bigger brother of the RH Logic 300. It offers the same customizability and functionality, just bigger and better. Head over to the Logic 300 if you are below about 5ft 6in.
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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The Ultimate Orthopaedic Chair - Excellent Back Support
The RH Logic 400 encourages you to move by moving with you, keeping you constantly supported throughout your day regardless of your seating angle.
The chair is easily adapted to suit the user's needs, taking into account height, weight and the level of neck and lumbar support needed. No matter your seating position, the Logic 400 ensures you can work supported and pain-free through the day.
Key Features:
- Lumbar Support: The Logic 400 provides robust and adjustable back support to users, keeping you supported while you work and minimising pain
- Fully Adjustable: Customise the Logic 400s features to your individual needs with the adjustable neckrest, armrests, back height, seat slide, and seat angle.
- Adapts To You: Innovative design allows the Logic 400 to move with you while you work, encouraging dynamic seating and keeping you supported all day.
Additional benefits:
- Dynamic Seating Improves Health: Being able to adjust the seat and other components helps circulation and oxygen flow, it can also benefit your digestive system.
- Work Pain-Free: The Logic 400 provides a range of different ergonomic supports to fight against back pain, neck pain and prevent the risk of developing other musculoskeletal issues.
- Work Productively: Being able to adapt to your movements and keep you pain-frepain-free throughout the day means you can focus on working productively on what matters.
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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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