Swapping refined grains for whole grains when possible can result in a flatter stomach. Include your email address to get a message when this question is answered. To get a flat stomach, focus on building and strengthening your core muscles. Check Youtube…search for double rainbow…the dude has to be wasted on mushrooms…. Fat from your belly is usually the first to go during a weight loss regimen, and regular high-intensity aerobic workouts tend to lead to slimmer waists. Seeing gorgeous tummies makes me nervous and does that to me… Looks good on you though! Fit bodies come in all shapes and sizes, so a flat stomach is possible even if you have a thick body type.