The "Diet Chair" Question: What KOKUYO's Ing Calorie Test Actually Measured

Why Your Office Chair Might Be Sabotaging Your Fitness Goals

If you spend eight or more hours a day sitting, your chair isn't just a piece of furniture—it's a lifestyle factor that shapes how your body moves (or doesn't move) throughout the day.

You might be tracking calories, adjusting your diet, and hitting the gym on weekends, yet still seeing sluggish progress on the scale. One factor that's easy to overlook? The sheer number of hours you spend sitting completely still.

The problem isn't just sitting itself—it's sitting in a way that keeps your body totally inactive for hours on end. Most chairs lock your body into position. The Kokuyo Ing, however, is designed to keep you subtly moving even while seated.

Where Sitting Fits in Your Daily Energy Use

When most people start a diet, they focus on cutting calories. But the daily energy equation has three parts:

• Basal metabolic rate (BMR): Energy burned at rest, accounting for 60–70% of daily expenditure

• Activity thermogenesis: Energy burned through movement and exercise, about 20–30%

• Dietary thermogenesis: Energy used to digest food, roughly 10%

Diet matters, of course. But the more practical question isn't just "how little can I eat?" It's also:

• How often do I move throughout the day?

• Is my body completely stationary while sitting?

• Are my core and lower back muscles constantly resting?

If your total energy expenditure drops, even a strict diet yields diminished results. For office workers, remote professionals, and students sitting six or more hours daily, how you sit during those seven to eight hours is worth thinking about alongside diet and exercise.

That's why interest is growing in ergonomic chairs that encourage natural movement, not just passive support.

What Makes the Kokuyo Ing a "Diet Chair"?

360-Degree Gliding Mechanism

The core feature of the Kokuyo Ing is its 360-degree gliding seat. Traditional chairs lock your torso and hips in place. The Ing's seat, by contrast, moves fluidly in all directions—forward, back, side to side, and diagonally.

The principle is similar to sitting on a Swiss ball or balance ball: your body makes constant micro-adjustments to stay balanced. Unlike an actual balance ball, however, the Ing integrates this instability into a stable office chair frame, so you can work comfortably without wobbling off.

According to KOKUYO, the 360-degree gliding works like a balance ball; in a KOKUYO/Keio University muscle-activity (EMG) test of 10 people, 80% showed more shoulder-muscle activity and 50% more lower-back muscle activity than on a conventional chair (KOKUYO's 2017 press release). In that sense, the Ing isn't simply a "comfortable chair"—it's designed to turn sitting time into slightly more active time.

Is Kokuyo a Reputable Brand?

If you haven't heard of Kokuyo, here's the quick version:

• Japan's top-selling office furniture brand by revenue

• Official sponsor of the 2024 Paris Olympics

• Over 60 years of ergonomic research and manufacturing

• Global presence in Korea, Singapore, Australia, and beyond

Kokuyo sits in the same premium tier as Herman Miller and Steelcase, but remains less known in Western markets. Think of it as a well-kept secret among ergonomic enthusiasts.

How the Ing Supports Your Lower Back

The Ing's lumbar support works differently than the protruding lumbar pads found on most "back-support chairs." Instead of pushing firmly against one spot on your spine, the Ing encourages your spine to find its natural S-curve as you shift your weight.

Kokuyo explains that the 360-degree gliding, combined with what they call "3D Posture Support," distributes your body weight and reduces forward sliding, helping maintain proper seated posture without a traditional bulging lumbar cushion.

In other words, the Ing doesn't force your back into position. Instead, it keeps your core and lower-back muscles gently engaged, making it easier to maintain a healthy spinal curve naturally.

Related Research on Unstable Surfaces

A 2009 study published in the Korean Journal of Clinical Electrophysiology (Lee Dong-geol et al.) found that after four weeks of exercise on an unstable surface:

• Abdominal muscle strength improved significantly (p < 0.001)

• Back extensor strength improved significantly (p < 0.001)

• Overall balance ability showed statistically significant gains

That study looked at four weeks of exercise on an unstable surface, not at sitting in a chair, so it does not show that the Ing produces the same results.

What KOKUYO's Calorie Test Measured

KOKUYO published a single calorie figure for the original Ing in KOKUYO's 2017 press release: four hours of desk work while swaying on the Ing equalled about 1.5 km of walking, or about 85 kcal. Here are the test conditions KOKUYO lists:

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This is KOKUYO's own small test, not an independent or peer-reviewed study, and it does not show weight loss.

Sources: KOKUYO's 2017 press release; Lee Dong-geol et al., Korean Journal of Clinical Electrophysiology, 2009 (unstable-surface exercise study above)

Diet vs. Gym vs. Chair: A Realistic Comparison

Let's be honest about what actually sticks:

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Weight management isn't a three-month sprint—it's about changing the habit you practice eight hours a day. The Ing adds gentle movement to that habit; it is not a substitute for diet or exercise.

Who Should Consider the Kokuyo Ing?

This chair makes the most sense if you:

• Want more movement during long sitting hours

• Have a gym membership you rarely use (or quit after a month)

• Work remotely or at a desk for six or more hours daily

• Like the idea of active sitting without adding workout time

• Find static chairs stiff after long sessions

Where to Try the Kokuyo Ing in Person

The Ing feels noticeably different the moment you sit down. The gentle movement can feel unfamiliar at first, but after five minutes, most people don't want to go back to a static chair.

If you can, try the Kokuyo Ing in person at an authorized dealer or showroom and compare it with other high-end ergonomic models before you buy.

Final Thoughts: Your Chair Is Part of Your Daily Movement

Weight management isn't just about what you eat or how often you exercise. For anyone sitting eight hours a day, the chair itself becomes a variable in the energy equation.

The Kokuyo Ing won't replace the gym or a healthy diet, but it can add gentle movement to passive sitting time—in KOKUYO's test, about 85 kcal over four hours of desk work (KOKUYO's 2017 press release).

If you sit all day and want more movement in it, the chair you're sitting in is worth rethinking alongside your meals and workout plan.

For more ergonomic office chair reviews and guides, explore our recommended ergonomic chairs on Amazon or browse our full chair catalog.