Beach photos of DiCaprio fuel 'dad bod' debate — here's what belly fat actually does to your body

When photos of Leonardo DiCaprio, 51, walking shirtless on a Hawaiian beach surfaced ahead of a celebrity wedding, the internet did what it always does: it debated his physique. But the 'dad bod' conversation that followed carries a medical dimension that goes well beyond appearances.

DiCaprio was in Hawaii with his girlfriend, Italian model Vittoria Ceretti, 28, and a group of friends — including Tobey Maguire, Courteney Cox, and Kate Hudson — for the wedding of Jennifer Meyer to billionaire Geoff Ogunlesi at the Four Seasons Resort Lanai, according to The Sun. Maguire, Meyer's ex-husband, officiated the ceremony. Other guests included Jeff Bezos, Lauren Sanchez, Kris Jenner, and Zoe Kravitz.

The photos prompted a broader question: when does a softer midsection stop being a lifestyle aesthetic and start being a health warning sign?

New York City-based personal trainer Marfred Suazo — who has not trained DiCaprio — defines a dad bod as a 'loss of structure': an increase in waist circumference paired with a loss of muscle mass. He spoke with Fox News Digital about what drives it and how to reverse it.

Maybe you're losing structure in your day-to-day eating … moving a lot less, taking fewer steps per day. And, typically, you're eating and drinking more than you're moving. And the body just starts showcasing that stuff.— Marfred Suazo, personal trainer

The medical concern isn't the look — it's what lies beneath. Visceral fat, which sits deep within the abdomen and wraps around internal organs, is linked to a higher risk of cardiovascular disease, according to the Cleveland Clinic, as cited by Fox News. The National Institute of Diabetes and Digestive and Kidney Diseases sets a concrete threshold: men with a waist circumference greater than 40 inches face a higher risk of developing Type 2 diabetes and heart disease.

We want to try to mitigate these things as best as possible before they become an issue.— Marfred Suazo, personal trainer

Federal physical activity guidelines align with Suazo's approach: reducing visceral fat requires a calorie deficit through diet, at least 150 minutes of moderate aerobic activity per week, and strength training at least twice a week — methods shown to reduce visceral fat even before significant changes appear on a scale.

Suazo recommends starting with nutrition — understanding daily calorie intake and getting the right balance of protein, carbohydrates, and fats. He pairs that with full-body strength training two to three times per week, built around compound movements: squats, stiff-leg deadlifts, back rows, push-ups, chest presses, and pull-ups.

It's a tremendous exercise that targets the stomach, the biceps and the back.— Marfred Suazo, personal trainer

One common misconception Suazo is direct about: crunches and ab work alone will not burn belly fat.

When it comes to belly fat and any fat on the body, we can target our exercises through isolated movements, but we can only reveal it through a loss of body fat throughout the whole body.— Marfred Suazo, personal trainer

On timeline, Suazo is cautiously optimistic. He says people who tighten up their nutrition can see meaningful changes within weeks, though results vary by starting point, diet, and activity level. Better nutrition, he adds, also supports sleep, recovery, energy, and consistency in the gym — compounding the benefits over time.

Upon four weeks of dialing in your nutrition, you will see a tremendous change in the body.— Marfred Suazo, personal trainer

Why it matters — Visceral belly fat is one of the most common and underestimated health risks in middle age, and the evidence-based steps to reduce it are straightforward — making this a story with direct practical value for a wide readership.

Reported by foxnews.com, the-sun.com, mayoclinic.org