It can indicate a relatively low body fat percentage and good muscle tone, both of which are important for overall health and well-being. 3. Distended or bloated stomach: A distended or bloated stomach can be caused by a variety of factors, including overeating, gas, or digestive issues. Chronic bloating may be a sign of underlying digestive problems, such as irritable bowel syndrome (IBS) or food intolerances. 4. Hard or firm stomach: A hard or firm stomach can be a sign of strong abdominal muscles or tension in the abdominal area.