How to lose belly fat in 10 minutes a day without going to the gymA toned abdomen and a defined waist depend largely on the strength of the oblique muscles, which form the body's natural corset. Control Sign: Ensure the load is felt in the abdominal muscles, not the neck. Plank with Hip RotationsThis exercise strengthens the deep transverse muscles that support internal organs and prevent the stomach from protruding. Stopping Rules and ContraindicationsPostpartum: Those recovering from childbirth must ensure there is no diastasis recti (abdominal muscle separation) before starting. Those recovering from childbirth must ensure there is no diastasis recti (abdominal muscle separation) before starting.