Even if your body weight is normal, you should ask your heart doctor about a simple noninvasive test that detects hidden belly fat, a risk factor for heart disease, according to a report in the journal clinical Endocrinology. Known as the brachial-ankle pulse wave velocity test. It accurately predicts the presence of visceral fat around the organs by measuring how efficiently blood move throughout the body (visceral is known to impede that flow). Researchers say hidden belly fat is most commonly found among normal-weight people who get little or no exercise..