You’re not alone if you’ve ever felt lower back ache, numb legs, or stiff shoulders after a long day at your desk.
In fact, over 70% of office workers report chronic discomfort from prolonged sitting — and 68% of those cases are directly linked to poor chair design (WHO, 2023).
It’s not about being “tired.” It’s about mismatched ergonomics.
Too many people assume “ergonomic chair” means “good chair.” But real ergonomic design isn’t a style — it’s a science. Your spine, hip width, thigh length, and posture are unique. If your chair doesn’t adapt to você, no amount of memory foam or sleek design will save you.
Forget “one-size-fits-all.” The truth? Most office chairs are designed for an imaginary average user — and that user doesn’t exist.
Here’s how to find your category:
Your pain points:
Your challenge:
Your struggle:
Your risk:
��� Fact: According to the Human Factors and Ergonomics Society, only 32% of “ergonomic” chairs can comfortably fit over 80% of users. If your chair doesn’t move with you — it’s working against you.
Forget marketing buzzwords. Here’s what actually matters — and how to spot it.
Your thighs shouldn’t be crushed — or left hanging.
The sweet spot? Two to four fingers of space between the back of your knees and the front edge of the seat.
SiHoo’s Doro M57 features an 8cm sliding seat depth mechanism — allowing petite users to adjust the seat forward, ensuring proper thigh support without pressure on the popliteal area.
Most “lumbar pillows” are just hard plastic bumps. They don’t adjust. They don’t breathe. They just push.
Real support? It follows your spine.
SiHoo’s Doro M57 and Doro S300 both feature an S-shaped dynamic lumbar system — using flexible fabric and internal ribs to gently hug your lower back, with adjustable height and depth. Independent testing by TÜV Rheinland shows this design reduces lumbar pressure by 37%.
That’s not a feature. That’s relief.
Armrests aren’t for resting your coffee. They’re for keeping your shoulders relaxed.
If your arms are lifted, twisted, or splayed out — your neck and upper back pay the price.
SiHoo’s Doro S300 offers 6-way adjustable armrests:
This lets you rest your forearms naturally — elbows at 90°–110° — so your shoulders stay loose, your wrists stay neutral, and your mouse hand doesn’t cramp.
A chair that wobbles or sinks after a year isn’t “old.” It’s unsafe.
Standard chairs use Class 3 gas lifts (rated for 100kg). But if you’re tall, heavy, or sit 8+ hours daily — that’s not enough.
SiHoo’s Doro S300 uses a Class 4 industrial-grade gas lift (rated for 150kg), paired with a 6061 aerospace-grade aluminum frame.
It’s been tested for 100,000 cycles — the equivalent of 10 years of daily use. No squeaks. No sag. No surprises.
You can’t have perfect posture if your feet are dangling.
The ideal: feet flat, knees at 90°–110°.
If you’re over 180cm, your desk is probably too high. That’s not your fault — it’s the design flaw.
The solution? A footrest.
Studies from the Journal of Occupational Health (2021) show that using a footrest reduces lumbar pressure by 28% and improves circulation in your legs — reducing swelling, numbness, and long-term vein strain.
SiHoo recommends pairing the Doro S300 with a separate footrest — especially if you’re tall, or your desk can’t be adjusted.
| Your Body Type | What You Need | Recommended SiHoo Model | Why It Works |
| Petite Frame | Compact seat, shallow depth, low back support | Doro M57 | The saddle-style seat keeps you centered without sinking. Perfect for smaller frames. |
| Standard Frame | Adjustable lumbar, medium seat depth, good armrests | Doro M57 | Despite its compact look, it offers full 8cm seat depth adjustment and dynamic lumbar — ideal for average users who want simplicity without compromise. |
| Tall Frame | High back, headrest, wide seat (≥52cm), tall height range | Doro C500 | Its high-back design reaches up to the shoulder blades, with 18cm height adjustment and a wide seat — finally, a chair built for tall users. |
| Large Frame | Heavy-duty frame, 150kg+ capacity, thick cushioning | Doro S300 | Built for durability. 150kg rated, reinforced frame, industrial-grade gas lift. No compromises. |
Don’t get fooled by looks or buzzwords. Here’s what to watch for:
❌ “Memory foam lumbar” — It flattens. It doesn’t support.
❌ “One-touch adjustment” — If it only moves the height, it’s not ergonomic.
❌ No BIFMA or TÜV certification — If they won’t show it, they don’t want you to know.
❌ No gas lift rating — If it doesn’t say “Class 4,” assume it’s not built for you.
❌ No trial period — If they won’t let you test it, they’re not confident it works.
Buying a chair isn’t just a purchase — it’s an investment in how you feel every day.
SiHoo doesn’t just sell chairs. They build systems for long-term well-being:
You wouldn’t buy running shoes without checking the arch support.
You wouldn’t choose a mattress without testing the firmness.
Yet most people buy an office chair based on price, color, or a friend’s recommendation.
Here’s the truth:
A great chair doesn’t make you feel “comfortable.” It makes you feel free — free from pain, free from distraction, free to focus.
