Slim physique but a 'beer belly'? Here's how you are still at risk of heart damage

Picture this: You are someone who takes fitness quite seriously. You check your meal portions, you don’t make excuses to miss a gym day, and you try to squeeze in an occasional run once in a while. However, despite keeping up with a healthy lifestyle, you might be at risk of having a heart attack. Why?

One might look slim and fit on the outside, but if their waistline sticks out with a ‘beer belly’, they could still be at risk of heart disease. New research is shedding light on people, especially men, who carry extra fat around the belly, as they are linked to a higher chance of having heart damage, even if their overall weight seems normal.

This type of belly fat, known as abdominal or visceral fat, surrounds internal organs and affects how the heart works. And unlike general body weight measured by BMI, belly fat gives doctors a clearer picture of hidden health dangers.

Let’s understand the full picture of why a beer belly matters can help you protect your heart and overall health.

First, let’s understand belly fat. Also known as visceral fat, belly fat is fat that builds up deep within the abdomen and around the internal organs. It's different from subcutaneous fat, which is the fat just below the skin that you can pinch.

While belly fat can refer to both subcutaneous fat, which is located just below the skin, and visceral fat, which is located deep within the abdomen, the latter kind (also known as "active fat") surrounds your internal organs like your liver, stomach, and intestines. It's more dangerous to your health than subcutaneous fat, and can increase the risk of conditions like high blood pressure, heart disease, and type 2 diabetes.

A “beer belly” refers to the same abdominal obesity, i.e., the fat stored deep around your stomach (the abdominal area) and internal organs. This type of fat is more dangerous for your health because it sends harmful signals through your bloodstream and affects key body functions.

Many people assume that overall body weight or BMI tells the full story about health risks. However, that’s not the full picture at all. Recent scientific evidence now shows that fat distribution (where fat is stored) is often more important than how much you weigh on the scale. This means someone can be slim but still carry unhealthy fat deep in the belly.

A large new study presented at this year’s Radiological Society of North America (RSNA) meeting found that abdominal fat is closely linked with harmful changes in the heart’s structure, particularly in men. For this research, scientists used advanced cardiac MRI scans on more than 2,200 adults aged 46–78 who did not have diagnosed heart disease.

Instead of only looking at BMI (body mass index), researchers measured the waist-to-hip ratio (WHR), which is a simple way to assess how much fat is around the belly compared to the hips. According to that evaluation, a high WHR suggests more abdominal fat.

The aforementioned research presented these findings:

• Belly fat was linked with cardiac remodeling, i.e., the heart’s muscle walls thickened while its pumping chambers became smaller. This phenomenon can strain the heart and reduce its ability to pump blood efficiently.
• Fat stored around the abdomen was linked to subtle tissue changes in the heart, which suggested early stress long before the symptoms appear. The researchers described some of these changes as “concentric hypertrophy”, where the heart muscle grows thicker without expanding in size. In time, this decreases the heart’s volume, leading to pumping less blood with each beat, which can eventually lead to heart failure if left unchecked.
• Furthermore, these harmful changes were stronger in men than in women, especially in the right ventricle (the chamber that sends blood to the lungs).
  

The study found specific differences in sex in how abdominal fat affects the heart. As per the study, men tend to accumulate belly fat earlier and more intensely than women. One of the reasons for that may be that men showed more pronounced heart changes in the research. However, some scientists also think male bodies might lack certain protective effects that female hormones like estrogen provide.

That said, the research underlines that both men and women with high abdominal fat are still at risk — the only difference being that men showed stronger associations in this particular study.

Gone are the days when BMI (body mass index) used to be a reliable marker of health. Experts now say that using waist measurements (like waist circumference or WHR) in regular health checkups can provide better insight into heart disease risk than BMI alone. Why? Because BMI doesn’t show where your body stores fat, and someone with a “normal” BMI can still carry dangerous visceral fat around the belly. This is why healthcare providers often advise measuring your waist and comparing it to your hip size.

For instance, if your waist measures more than half your height, you might be at a higher risk of heart disease even if your weight is in the “healthy” range. According to Harvard Health, a waist-to-hip ratio above 0.90 for men and 0.85 for women suggests a higher risk.

Genetics indeed plays a powerful role in physique, true. However, conscious lifestyle choices can prove useful when it comes to reducing visceral fat to protect your heart:

Healthy nutrition: Focus on whole foods and limiting added sugars, while keeping a balanced diet.

Regular workout: Exercises, including both aerobic and strength training, contribute to the reduction of abdominal fat.

Keep an eye on the markers: Check for blood pressure, cholesterol, and blood sugar levels regularly.

Reduce stress and get quality sleep: Poor sleeping and chronic stress increase fat in one's belly area. Incorporate a healthy sleep practice and a stress-relieving ritual to fight that.

Measure your waistline regularly: Keep your waist size in order. This simple tape-measure check can show you early warnings that you might not notice otherwise.