Nick NorwitzMD PhD, Oxford-Harvard | Metabolic Health Educator | “Stay Curious”

What Is “Skinny Fat?” (And How to Fix It)

30 Aug 2026 · 1 min

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In this concise educational video, Nick Norwitz explains the “skinny fat” condition—a situation where a person has a normal BMI and appears thin but actually carries excess body fat, especially visceral fat, and insufficient muscle mass. He outlines the health dangers of hidden visceral fat, including increased cardiovascular risk and accelerated brain atrophy. Norwitz provides a quick self‑assessment: measure waist‑to‑height ratio (risk if > 0.5) and evaluate push‑up strength (fewer than 10 for men or 5 for women suggests low muscle). He then offers a simple, reversible plan: consume adequate protein, reduce sugar intake, and focus on resistance training to build muscle and lower fat.

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You can be a healthy weight and still be fat. In fact, 1 in 3 normal weight people are. It's a condition known as skinny fat, and I'm gonna show you how to test for it in a moment. But first, what is skinny fat? Well, your BMI is normal, friends probably think you're thin, but underneath you have too much body fat and too little muscle, and it's a sneaky dangerous combination because hidden visceral fat packed around your organs raises risk of cardiovascular disease and can even accelerate brain shrinkage over time. So, how do How do you know if you're skinny fat? Well, here's one simple test. Measure your waist at the level of your belly button, then divide that number by your height. If your waist-to-height ratio is greater than 0.5, you're at high risk for being skinny fat. And a second clue is strength. If you can't do 10 push-ups as a man or 5 push-ups as a woman, there's a good chance you're lacking muscle. The good news? This is reversible. Eat enough protein, cut back on sugar, and prioritize resistance training.