If you feel like you are prone to gaining belly fat, it may be that your “abdominal pressure (intra-abdominal pressure)” is decreasing. When the pressure inside the abdominal cavity (the space inside the abdomen that contains the internal organs such as the esophagus, small intestine, and large intestine) decreases, more force is exerted outward, causing the stomach to bulge. So what you want to incorporate into your routine is a simple exercise to strengthen your abdominal pressure.
Simple exercises to strengthen your abdominal muscles
(1) Lie on your back on the floor with your knees bent and your legs spread to hip width. Inhale and tilt your pelvis backward until it is firmly pressed against the floor.
(2) Lift both knees, and while inhaling, bring your knees with both hands and bring them closer to your chest.
(3) As you exhale, lift your face and bring it closer to your raised knee.