Lower Back Pain
Problem Reason: Sitting for long hours puts extra pressure on your lower back. (Standing puts about 100% of your normal pressure on the spine, but sitting without support can raise that pressure to 140%.)
*/Wilke, H.J., et al. (1999).Intradiscal pressure sitting vs. standing.Spine, 24(8), 755-762.
Ergonomic Solution:
Lower Back Support: An adjustable lumbar support helps take pressure off your lower spine. Studies show that proper ergonomic support can reduce spinal pressure to about 85% of what it is when standing.
Reclining Angle: Leaning your chair back between 100° and 110° is the sweet spot—it puts the least pressure on your lower back.
*/Vergara, M., & Page, Á. (2002).Relationship between comfort and back posture in automobile seats.Applied Ergonomics, 33(2), 117-124.
Neck & Shoulder Pain
Problem Reason: Leaning your head forward adds a heavy strain on your neck and shoulders. (For every inch your head shifts forward, your neck feels about 10 pounds of extra weight.)
Ergonomic Solution:
Neck Support: A headrest can reduce strain on your neck muscles by up to 27%.
Armrest Height: When your armrests are level with your desk, it can lower muscle activity in your shoulders by around 15%.
*/Aarås, A., et al. (2019).Effect of head support on neck muscle activity.Applied Ergonomics, 74, 55-63.
Mörl, F., & Bradl, I. (2017).Armrest adjustments and shoulder muscle load.International Journal of Industrial Ergonomics, 58, 1-8.
Sciatica & Hip Pain
Problem Reason: Sitting on a hard surface puts pressure on your sit bones. (When pressure on this area goes over 25 mmHg, it can reduce healthy blood flow.)
Ergonomic Solution:
Pressure-Relief Seat Cushion: Memory foam or mesh cushions help spread out the pressure on your sit bones, easing pressure on your hips by about 30%.
Seat Depth Adjustment: Leaving about 2 inches (5 cm) of space between the front edge of the seat and the back of your knees helps reduce pressure on your thighs.
*/Goossens, R.H., et al. (2020).Pressure-reducing seat cushions.Ergonomics, 63(4), 452-461.
Nagano, H., et al. (2019).Effects of seat depth on hip flexion angle.Journal of Physical Therapy Science, 31(1), 1-5.
Wrist & Elbow Pain
Problem Reason: Armrests that are too high or too low can overwork your wrist muscles. (When your wrist bends upward more than 15 degrees, it increases stress on the tendons.)
Ergonomic Solution:
Adjustable Armrests: When your armrests are set to the same height as your keyboard, it cuts wrist strain in half by reducing the sideways bending of your wrists.
Elbow Support: Keeping your elbows bent between 90° and 110° helps reduce strain on your forearm muscles by about 20%.
*/Rempel, D., et al. (2018).Effects of keyboard tray and arm support.American Journal of Industrial Medicine, 61(1), 45-54.
Lin, R.T., et al. (2020).Ergonomic interventions for office workers.PLOS ONE, 15(6), e0234564.
Sihoo C300 Advanced Ergonomic Office Chair with Advanced Back Support
Sihoo M59AS Space-Saving Ergonomic Office Chair with Flip-Up Arms
Sihoo M57 Ergonomic Office Chair with Breathable Mesh Cushion
Sihoo M18 Ergonomic Office Chair with Soft Cushion & Spine Support
The Sihoo Doro C300 is built to tackle back and waist pain caused by long hours of sitting. Its dynamic domino lumbar support offers several key benefits:
Spine-shaped ergonomic design
Inspired by the structure of the adult human spine—made up of 26 interlinked bones—the C300’s backrest mimics the natural S-curve of your back. It moves with you, providing dynamic support that helps reduce strain, improve posture, and keep you comfortable through every shift, stretch, and lean.
Dynamic Back Support That Moves With You
C300’s lumbar system automatically adjusts as you shift, providing continuous lower back support that keeps your spine aligned and reduces fatigue during long hours of sitting.
Adjustable Headrest for Neck Relief
The headrest can be raised, lowered, and angled to match your posture—ideal for reducing neck strain whether you’re leaning in to focus or reclining to relax.
Breathable, Durable, and Comfortable Mesh
High-quality mesh backrest keeps airflow moving, so you stay cool and dry even on hot days or during intense work/gaming sessions. It’s supportive without being stiff.
Soft, Supportive, and Adjustable 4D Armrest
The cushioned 4D armrests adjust up/down, forward/back, in/out, and pivot side to side—giving your arms perfect support no matter the task. Plus, they move in sync with your recline, so you stay supported even when you lean back to relax.
Mechanism – Sync-Tilt with Lumbar Linkage
C300’s tilt system is synced with the lumbar support—when you lean back, the lumbar follows your movement, offering dynamic support with every recline.
Sihoo M57 Ergonomic Office Chair with Breathable Mesh Cushion
Sihoo C300 Advanced Ergonomic Office Chair with Advanced Back Support
Sihoo M18 Ergonomic Office Chair with Soft Cushion & Spine Support
Sihoo M59AS Space-Saving Ergonomic Office Chair with Flip-Up Arms
Sihoo M56C Dual-Back Ergonomic Office Chair with Soft Cushion
Sihoo M56B Dual-Back Ergonomic Office Chair for Better Posture
Sihoo S100 Dynamic Ergonomic Office Chair with Lumbar Support
Sihoo C300 Pro Ergonomic Office Chair with Seat Depth for Long Sitting
Featured and recommended by top tech and lifestyle media
Sihoo has earned the trust of media outlets and industry professionals for its commitment to solving back and lower back pain caused by long hours of sitting.
Our Independence Day sale runs from June 28 through July 4 (11:59 PM)! Enjoy 5% off sitewide, and don’t miss limited-time deals with up to 25% off.
Sihoo chairs like the Doro C300 are built with dynamic lumbar support that adapts to your spine as you move. It's especially helpful if you sit for long hours working, studying, or gaming.
The Doro C300 is a customer favorite — thanks to its advanced lumbar support and sleek, modern design. Great for home offices and serious desk time.
Unlike basic office chairs, Sihoo focuses on ergonomic design. Features like adjustable lumbar support, flexible headrests, and breathable mesh help reduce fatigue and support healthier posture.
No worries — we offer a 30-day worry-free return policy. If there’s an issue with the product, we’ll cover return shipping and send replacement parts if needed.
Absolutely! Just hit the chat button — our team can recommend the best chair for your needs, whether it’s for work, gaming, or study.
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