In an article for the Daily Mail, Norton explains that there is a magic ratio to work out how healthy your shape is:
• Wrap a tape measure around your middle, halfway between the bottom of your ribs and the top of your hip bone, and make a note of the number.
• Measure the widest part of your hips, including your backside.
For a man, if you waist to hip ratio is one or more, or 0.85 for a woman, your health could be at risk, says Norton.
Why is tummy fat a risk?
Depending on your gender, genetics, stress levels and use of certain drugs, fat is distributed differently in people.
If you can "pinch more than an inch", you need to look at making some changes.
Having a big belly is a sign of excess fat in the liver and around other internal organs which could signal high blood pressure, fatty liver disease and type 2 diabetes, a predisposition for heart attacks, strokes and more.
READ MORE: • Top tips for moving stomach fat