There are times where BMI is less reliable e.g. if you are over 60, an athlete, pregnant, less than 5ft tall or a child/teenager. For this reason, taking a waist measurement is considered a better indication of the fat around your middle. A larger waist usually means there is excess fat inside your organs which is linked to high blood pressure and diabetes. If you would like any advice or support, then please come and see our friendly team to have your blood pressure checked or advice on weight loss.