Consumers can be obese yet physically healthy and fit and at no greater risk of heart disease or cancer than normal weight people, say researchers at the University of South Carolina.  The key is being “metabolically fit”, meaning no high blood pressure, cholesterol or raised blood sugar, and exercising, according to experts.   The results of studying 43,000 U.S. people, published in the European Heart Journal, found that being overweight did not pose a big health risk.  The subset of metabolically healthy obese people who did not suffer from conditions such as diabetes, high cholesterol or high blood pressure, were generally fitter and exercised more than the other obese people.  The findings show that getting more exercise can keep you healthier, even if you still carry a bit of extra weight.