A study involving 61,000 people and going back as far as the 1950s has revealed that being fat and fit is a myth.
Previously, it was thought that having a good rate of metabolic fitness was enough - so this means being able to process sugar and having a normal blood pressure – to prevent the negative effects of obesity such as heart disease and diabetes.
But Canadian researchers have found that the excess weight is still an issue when it comes to warding off disease. They found that even if overweight people don't have high blood pressure and are managing to regulate sugar normally, they still die younger than people of a normal weight.
The MailOnline reported that the scientists from the Lunenfeld-Tanenbaum Research Institute at Mount Sinai Hospital in Toronto, "conducted a review of eight studies published from 1950 onwards to find out whether these metabolic indicators were linked to premature death and heart disease in normal-weight, overweight and obese people."
The participants were classified by Body Mass Index (BMI), which gives weight guidelines based on height, and measured lipid profile (blood fats), glucose tolerance (sugar), blood pressure and waist circumference, as well as other metabolic features.