Why Doesn't Lower Abdominal Fat Go Away? The Blind Spot During Sleep.
Toratani Co., Ltd. announced a new theory that the reason lower abdominal fat doesn't disappear despite diet and exercise is due to "incomplete combustion" during sleep. This is the second installment of their "Nocturnal Physics" series, which explains how changes in gravity during sleep affect respiratory structure, leading to oxygen deficiency and decreased metabolism.
📋 Article Processing Timeline
- 📰 Published: May 7, 2026 at 19:30
- 🔍 Collected: May 7, 2026 at 11:01
- 🤖 AI Analyzed: May 7, 2026 at 11:12 (11 min after Collected)
Even with diet and exercise, only the lower abdomen doesn't flatten. This common concern is not due to daytime activities, but to "incomplete combustion during sleep."
The underlying reason is a "change in respiratory structure at night" that medical science has largely overlooked.
When a person lies down, the direction of gravity shifts 90 degrees from daytime, and the airway, rib cage, and diaphragm subtly deform in a "direction that makes breathing difficult." This structural change, combined with others, makes breathing shallower for everyone during sleep, disrupting the autonomic nervous system, lowering metabolism, and making it difficult for lower abdominal fat to burn.
If the "nocturnal burning state" is poor, lower abdominal fat simply won't burn.
## What is "Incomplete Combustion" During Sleep?
When breathing becomes shallow during sleep, the body's oxygen supply decreases.
In a state of insufficient oxygen, the body prioritizes life support, entering an "energy-saving mode" that:
Lowers metabolism. Lowers body temperature. Does not burn fat.
Weak breathing during sleep means less oxygen, making fat harder to burn.
In other words,
Just a lack of oxygen at night prevents lower abdominal fat from burning.
This is "incomplete combustion."
## Why is the "Lower Abdomen" Most Affected?
Fat burning requires a lot of oxygen.
Especially visceral fat (around the lower abdomen) has a high oxygen dependency,
making it the most susceptible area to oxygen deficiency during sleep.
While fat burning begins with blood fat, visceral fat is the "most oxygen-dependent fat,"
and thus strongly affected by oxygen deficiency during sleep.
Lack of oxygen at night
→ Fat doesn't burn
→ Especially lower abdominal fat remains
This sequence occurs.
## The Problem is "Hypopnea," Not Just Apnea
Many people, including medical professionals, believe there's no problem unless it's "sleep apnea syndrome."
However, in reality, "hypopnea" (shallow breathing) that doesn't lead to apnea is overwhelmingly more common.
Furthermore, in a sleeping posture, the direction of gravity "shifts 90 degrees,"
causing the shape of the airway to change significantly from daytime.
This slight change easily leads to hypopnea (oxygen deficiency).
Hypopnea affects not only oxygen supply but also the "autonomic nervous system."
The autonomic nervous system is a "regulatory system responsible for many life-sustaining functions," such as metabolism, body temperature, and blood sugar regulation.
When breathing becomes shallow during sleep, the body tries to compensate for the slight oxygen deficiency,
making the sympathetic nervous system dominant.
This triggers a chain of changes such as:
・Lowered metabolism
・Tendency for body temperature to drop
・Fat becomes harder to burn
・Blood sugar becomes harder to lower
In other words, the sleeping posture leads to a sequence of:
90-degree change in gravity → Disadvantageous respiratory structure → Hypopnea → Autonomic nervous system imbalance → Decreased nocturnal metabolism.
While the individual may not easily notice it, and it rarely appears in tests,
oxygen supply definitely decreases, affecting the autonomic nervous system and metabolism.
## The Significance of "Angle" Revealed by 3D Design
In creating three-dimensional apparel structures, "subtle angle adjustments" to follow the body's lines greatly influence comfort and ease of movement.
Applying this idea to breathing, we examined how respiratory structures change in a sleeping posture from a three-dimensional perspective.
When lying down, the direction of gravity shifts 90 degrees from daytime, and the airway, rib cage, and diaphragm subtly deform in a "direction that makes breathing difficult." It was found that the ease of air passage and the depth of breathing change significantly at this time.
In other words,
・Airway patency
・Rib cage expansion
・Diaphragm mobility can be improved through three-dimensional angle adjustment.
This "angle optimization" is a three-dimensional approach to regulate the entire respiratory structure, not just the throat.
This is a "physical blind spot" that has been overlooked by compartmentalized medicine.
## Flattening the Lower Abdomen Depends More on "Nocturnal Burning State" Than "Daytime Efforts."
The reason the lower abdomen doesn't flatten is not a problem of diet, exercise, or core strength,
but a physical phenomenon of "fat not burning at night."
In other words,
The key to changing the lower abdomen lies in breathing and oxygen supply during sleep.
## Continuing to Disseminate as the "Nocturnal Physics" Series
In the first installment, we explained "blood sugar, triglycerides, and oxygen deficiency during sleep."
This second installment covers "lower abdomen and incomplete combustion."
We will continue to disseminate a series that explains sleep, breathing, and metabolism from a "physics" perspective.
There is a medical blind spot: "oxygen deficiency during sleep."
"This educational series is systematized by CEO Toratani based on his many years of 3D design knowledge and his own health improvement achievements, and will continue to disseminate information on the relationship between airway physics, sleeping posture, and breathing."
【Company Information】
Toratani Co., Ltd.
Representative: Ikumi Toratani
Location: Kahoku City, Ishikawa Prefecture
Business: Apparel 3D design, sleep and breathing research
Official Website: https://toratani-kokyu.jp
The underlying reason is a "change in respiratory structure at night" that medical science has largely overlooked.
When a person lies down, the direction of gravity shifts 90 degrees from daytime, and the airway, rib cage, and diaphragm subtly deform in a "direction that makes breathing difficult." This structural change, combined with others, makes breathing shallower for everyone during sleep, disrupting the autonomic nervous system, lowering metabolism, and making it difficult for lower abdominal fat to burn.
If the "nocturnal burning state" is poor, lower abdominal fat simply won't burn.
## What is "Incomplete Combustion" During Sleep?
When breathing becomes shallow during sleep, the body's oxygen supply decreases.
In a state of insufficient oxygen, the body prioritizes life support, entering an "energy-saving mode" that:
Lowers metabolism. Lowers body temperature. Does not burn fat.
Weak breathing during sleep means less oxygen, making fat harder to burn.
In other words,
Just a lack of oxygen at night prevents lower abdominal fat from burning.
This is "incomplete combustion."
## Why is the "Lower Abdomen" Most Affected?
Fat burning requires a lot of oxygen.
Especially visceral fat (around the lower abdomen) has a high oxygen dependency,
making it the most susceptible area to oxygen deficiency during sleep.
While fat burning begins with blood fat, visceral fat is the "most oxygen-dependent fat,"
and thus strongly affected by oxygen deficiency during sleep.
Lack of oxygen at night
→ Fat doesn't burn
→ Especially lower abdominal fat remains
This sequence occurs.
## The Problem is "Hypopnea," Not Just Apnea
Many people, including medical professionals, believe there's no problem unless it's "sleep apnea syndrome."
However, in reality, "hypopnea" (shallow breathing) that doesn't lead to apnea is overwhelmingly more common.
Furthermore, in a sleeping posture, the direction of gravity "shifts 90 degrees,"
causing the shape of the airway to change significantly from daytime.
This slight change easily leads to hypopnea (oxygen deficiency).
Hypopnea affects not only oxygen supply but also the "autonomic nervous system."
The autonomic nervous system is a "regulatory system responsible for many life-sustaining functions," such as metabolism, body temperature, and blood sugar regulation.
When breathing becomes shallow during sleep, the body tries to compensate for the slight oxygen deficiency,
making the sympathetic nervous system dominant.
This triggers a chain of changes such as:
・Lowered metabolism
・Tendency for body temperature to drop
・Fat becomes harder to burn
・Blood sugar becomes harder to lower
In other words, the sleeping posture leads to a sequence of:
90-degree change in gravity → Disadvantageous respiratory structure → Hypopnea → Autonomic nervous system imbalance → Decreased nocturnal metabolism.
While the individual may not easily notice it, and it rarely appears in tests,
oxygen supply definitely decreases, affecting the autonomic nervous system and metabolism.
## The Significance of "Angle" Revealed by 3D Design
In creating three-dimensional apparel structures, "subtle angle adjustments" to follow the body's lines greatly influence comfort and ease of movement.
Applying this idea to breathing, we examined how respiratory structures change in a sleeping posture from a three-dimensional perspective.
When lying down, the direction of gravity shifts 90 degrees from daytime, and the airway, rib cage, and diaphragm subtly deform in a "direction that makes breathing difficult." It was found that the ease of air passage and the depth of breathing change significantly at this time.
In other words,
・Airway patency
・Rib cage expansion
・Diaphragm mobility can be improved through three-dimensional angle adjustment.
This "angle optimization" is a three-dimensional approach to regulate the entire respiratory structure, not just the throat.
This is a "physical blind spot" that has been overlooked by compartmentalized medicine.
## Flattening the Lower Abdomen Depends More on "Nocturnal Burning State" Than "Daytime Efforts."
The reason the lower abdomen doesn't flatten is not a problem of diet, exercise, or core strength,
but a physical phenomenon of "fat not burning at night."
In other words,
The key to changing the lower abdomen lies in breathing and oxygen supply during sleep.
## Continuing to Disseminate as the "Nocturnal Physics" Series
In the first installment, we explained "blood sugar, triglycerides, and oxygen deficiency during sleep."
This second installment covers "lower abdomen and incomplete combustion."
We will continue to disseminate a series that explains sleep, breathing, and metabolism from a "physics" perspective.
There is a medical blind spot: "oxygen deficiency during sleep."
"This educational series is systematized by CEO Toratani based on his many years of 3D design knowledge and his own health improvement achievements, and will continue to disseminate information on the relationship between airway physics, sleeping posture, and breathing."
【Company Information】
Toratani Co., Ltd.
Representative: Ikumi Toratani
Location: Kahoku City, Ishikawa Prefecture
Business: Apparel 3D design, sleep and breathing research
Official Website: https://toratani-kokyu.jp