When we have osteoporosis, the midsection can appear to expand because the spine gradually compresses and curves forward, which shortens the torso and pushes the abdominal area outward - the rib cage moves closer to the pelvis and posture changes make the belly protrude even if body fat has not increased.

The most helpful exercises are those that strengthen the back extensors and support upright posture, such as prone back extensions (lying face down and gently lifting chest), resistance-band rows, wall angels, bird dog, and deadlifts and hip hinges with good form, along with core stabilizing work like planks - these help counter that spinal rounding, maintain height, and keep the abdomen from being pushed forward.