Abdominal fat contributes to the risk of heart disease by causing insulin resistance, raising blood pressure, worsening cholesterol levels, triggering chronic inflammation, and altering the structure and function of the heart.
Abdominal fat is fat stored in and around your abdomen (belly) area.
Most people think belly fat is simply the fat they can see or pinch.
Research consistently shows that central (abdominal) obesity is more strongly related to cardiovascular disease than fat stored around the hips or thighs because it is closely associated with metabolic syndrome, high blood pressure, insulin resistance, and chronic inflammation.
Subcutaneous fat is the layer of fat located just beneath the skin. It is the fat you can pinch around your abdomen, arms, thighs, or hips. While excessive amounts can contribute to obesity and metabolic disease, subcutaneous fat is generally less harmful to the cardiovascular system than deeper abdominal fat because it is relatively less metabolically active.
Visceral fat is the fat stored deep within the abdominal cavity, surrounding organs such as the liver, pancreas, intestines, and kidneys. Unlike subcutaneous fat, it cannot be seen or pinched, meaning someone can have a normal body weight yet still carry excessive visceral fat.
This is the type of fat most strongly linked to heart disease. Visceral fat behaves like an active endocrine organ.
It contains more inflammatory and immune cells, is more resistant to insulin, releases free fatty acids and produces higher levels of inflammatory cytokines such as TNF-α and IL-6 while producing less protective adiponectin.
These changes create the conditions that increase cardiovascular disease.
There is another type of fat the sorrounds the heart. Epicardial fat
Epicardial fat is a specialized form of visceral fat that lies directly on the surface of the heart and surrounds the coronary arteries. Under normal conditions it helps cushion the heart and supplies energy to the heart muscle.
However, when it becomes excessive, it changes from a protective tissue into a source of inflammation.
Because epicardial fat is in direct contact with the heart and coronary arteries, the inflammatory molecules it produces act locally, promoting plaque formation, coronary artery disease, and abnormal heart rhythms such as atrial fibrillation.
Also known as normal weight obesity. It describes people who have a normal body weight and body mass index (BMI) but still carry too much visceral fat around their organs. Because BMI only measures weight relative to height, it cannot show where fat is stored. As a result, many people with skinny fat appear healthy but still have a high risk of heart disease.
Studies show that people with this "normal-weight obesity" are more likely to develop high blood pressure, type 2 diabetes, unhealthy cholesterol levels, and early artery disease than people with the same weight who have less body fat.
This means a normal weight does not always mean a healthy heart. Measuring your waist circumference along with your BMI gives a much better picture of your heart disease risk.
Unlike fat under the skin, visceral fat is biologically active. It releases inflammatory chemicals such as TNF-α and IL-6, while producing lower amounts of protective hormones. Over time, this inflammation damages blood vessels, speeds up plaque formation, and increases the risk of heart disease.
Visceral fat increases blood pressure by producing hormones that tighten blood vessels and by making the arteries stiffer. This forces the heart to work harder. Studies show that a larger waist circumference increases the risk of high blood pressure even in people with a normal BMI.
Visceral fat sends large amounts of fatty acids to the liver, causing it to produce more triglycerides and harmful low density-lipoprotein LDL "bad" cholesterol while lowering protective high density-lipoprotein HDL "good" cholesterol. This unhealthy cholesterol pattern speeds up plaque buildup inside the arteries.
The inflammatory chemicals released by visceral fat make it harder for the body to respond to insulin. Over time, this can lead to prediabetes, type 2 diabetes, and metabolic syndrome, all of which greatly increase the risk of heart disease.
Over time, high blood pressure, inflammation, and the extra workload caused by visceral fat can make the heart muscle thicker and enlarge its chambers. These changes reduce how well the heart pumps and increase the risk of heart failure and abnormal heart rhythms.
Visceral fat is the main feature of metabolic syndrome, a condition that includes abdominal obesity, high blood pressure, high blood sugar, high triglycerides, and low HDL "bad" cholesterol. It is also closely linked to non-alcoholic fatty liver disease (NAFLD), which further increases the risk of heart attack and stroke.
Chronic stress increase the amount of fat stored around your abdomen. The main reason is cortisol, the body's primary stress hormone.
When cortisol remains high for long periods, it encourages the body to store more fat deep inside the abdomen around the internal organs rather than under the skin. At the same time, it increases appetite, especially for high-calorie, sugary foods, making visceral fat even more likely to accumulate. People with long-term stress, poor sleep, shift work, or conditions such as Cushing's syndrome often develop this pattern of fat storage.
Poor sleep also worsens the problem. Sleep deprivation raises cortisol levels, lowers growth hormone which normally helps limit fat accumulation and increases insulin resistance. Together, chronic stress and poor sleep create a hormonal environment that strongly favors abdominal fat gain, even when diet has not changed significantly.
Waist circumference is the simplest and most reliable way to estimate abdominal fat.
How to measure
Stand upright and relax.
Find the midpoint between your lowest rib and the top of your hip bone (usually around the level of your navel).
Wrap a measuring tape around your waist without pulling it too tight.
Breathe out normally and record the measurement.
Higher cardiovascular risk:
Men: More than 94 cm (37 inches)
Women: More than 80 cm (31.5 inches)
Some studies suggest that African populations may develop metabolic and cardiovascular problems at slightly lower waist measurements, so monitoring waist size regularly is especially important.
This compares your waist size with your hip size.
Formula
Waist circumference ÷ Hip circumference
Higher cardiovascular risk:
Men: Above 0.90
Women: Above 0.85
A higher ratio means more fat is stored around the abdomen rather than the hips, which is linked to greater heart disease risk.
This compares your waist size with your height.
Formula
Waist circumference ÷ Height
A simple rule is:
> Your waist should be less than half your height.
A ratio of 0.5 or higher is associated with increased risk of heart disease, diabetes, and other chronic illnesses. This measure works well because it takes differences in body size into account.
Body Mass Index (BMI) estimates whether a person is underweight, normal weight, overweight, or obese, but it cannot show where fat is stored.
Someone can have a normal BMI but still carry large amounts of dangerous visceral fat. BMI also cannot distinguish fat from muscle.
For a better assessment of heart disease risk, BMI should be used together with waist circumference or waist-to-height ratio rather than on its own.
These individuals may look slim but still have excess visceral fat around their organs. Because their weight appears normal, their heart disease risk is often overlooked. Regular waist measurements are especially important for this group.
After menopause, falling estrogen levels change where fat is stored. Instead of being stored around the hips and thighs, more fat accumulates around the abdomen. This increase in visceral fat raises the risk of heart disease, type 2 diabetes, and metabolic syndrome.
Long-term stress and inadequate sleep keep cortisol levels elevated, encouraging the body to store more visceral fat. Managing stress and improving sleep can therefore help reduce abdominal fat and lower cardiovascular risk.
Spending many hours sitting each day slows fat metabolism and encourages visceral fat accumulation. Office workers and people working from home without regular physical activity are particularly at risk.
Read More: Is Too Much Sitting Bad For The Heart?
Frequent intake of sugary drinks, sweets, white bread, pastries, refined flour products, and other processed carbohydrates encourages the liver to convert excess sugar into fat. Much of this fat is stored deep inside the abdomen, increasing heart disease risk.
Insulin resistance and visceral fat reinforce each other. Excess abdominal fat makes insulin resistance worse, while insulin resistance promotes further fat storage around the abdomen. This cycle greatly increases the risk of cardiovascular disease.
Yes. Reducing visceral fat can quickly improve many of the factors that increase the risk of heart disease.
As belly fat decreases, blood pressure often falls, triglyceride levels improve, HDL ("good") cholesterol increases, blood sugar becomes easier to control, and inflammation decreases. Over time, the heart can also begin to recover from some of the structural changes caused by excess abdominal fat.
Some improvements, such as better blood sugar and triglyceride levels, can be seen within a few weeks of healthy lifestyle changes. Blood pressure usually improves within a few months, while changes in the heart's structure may take longer.
Regular aerobic exercise is one of the best ways to reduce visceral fat
Activities such as brisk walking, cycling, swimming, jogging, or dancing improve insulin sensitivity, reduce inflammation, lower cortisol, and help burn abdominal fat.
Aim for at least 150 minutes of moderate-intensity exercise each week as an adult. Even a 30–45 minute brisk walk most days can make a significant difference over time.
Resistance exercises such as push-ups, squats, lunges, planks, or weight training help build muscle.
More muscle increases the number of calories your body burns at rest, improves insulin sensitivity, and supports long-term fat loss. Combining strength training with aerobic exercise is more effective than either alone.
Aim for 2–3 strength-training sessions each week.
Diet plays a major role in reducing visceral fat.
Try to:
Healthy eating helps reduce inflammation, improve cholesterol levels, and lower visceral fat.
Poor sleep makes it harder to lose belly fat.
Sleeping fewer than seven hours increases cortisol, raises hunger hormones, and makes the body store more visceral fat.
A study showed that people who sleep too little lose less body fat even when following the same calorie-restricted diet.
Aim for 7–9 hours of quality sleep each night.
Chronic stress keeps cortisol levels high, encouraging the body to store more fat around the abdomen.
Simple habits such as regular exercise, deep breathing, meditation, spending time with family and friends, and getting enough sleep can help lower stress and reduce this effect over time.
Read More: 9 Ways to Manage Stress Daily that Support the Heart
You should speak with your doctor if:
It is also good to measure waist circumference during routine health checks because it provides valuable information about heart disease risk that BMI alone cannot show. If your waist has never been measured during a medical visit, ask your healthcare provider to include it as part of your cardiovascular assessment.
Abdominal fat, especially visceral fat, increases the risk of heart disease. It raises blood pressure, causes chronic inflammation, worsens cholesterol levels, promotes insulin resistance, and changes the structure of the heart itself.
Where fat is stored matters more than body weight alone. You can have a normal BMI and still have excess visceral fat that increases your risk of heart disease.
Visceral fat responds well to healthy lifestyle changes.
Regular physical activity, a balanced diet, good-quality sleep, and effective stress management can reduce belly fat and improve heart health. Even modest reductions in visceral fat can lead to meaningful improvements in blood pressure, cholesterol, blood sugar, and inflammation.
Q: Does abdominal fat directly cause heart disease?
Yes. Visceral fat does more than increase body weight. It raises blood pressure, increases inflammation, worsens cholesterol levels, promotes insulin resistance, changes the structure of the heart, and contributes to metabolic syndrome. Together, these changes significantly increase the risk of heart disease.
Q: Can you have a high risk of heart disease from belly fat even if your BMI is normal?
Yes. You can have a normal BMI and still carry excess visceral fat around your organs—a pattern known as skinny fat.
Q: What waist size increases heart disease risk?
In general, a waist circumference above 94 cm (37 inches) for men and 80 cm (31.5 inches) for women is associated with higher cardiovascular risk.
Q: Why is belly fat more dangerous than fat in other parts of the body?
Visceral fat surrounds organs such as the liver and pancreas and is much more active than fat under the skin. It releases inflammatory chemicals and hormones that increase blood pressure, worsen cholesterol levels, and damage blood vessels, making it much more harmful to the heart than fat stored on the hips or thighs.
Q: Can stress increase belly fat?
Yes. Chronic stress raises cortisol levels, and cortisol encourages the body to store more fat around the abdomen. Over time, this increases visceral fat and raises the risk of heart disease. Poor sleep can make this process even worse.
Q: How quickly does losing belly fat improve heart health?
Some benefits can appear within a few weeks. Blood sugar and triglycerides often improve first, followed by blood pressure over the next few months. Long-term lifestyle changes can also reduce inflammation and gradually improve heart function. Even modest reductions in visceral fat can make a meaningful difference.
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