Osteoporosis primarily means that bones become weak and are more prone to fractures. It does not directly cause hands and feet to shrink or deform. However, since osteoporosis can lead to fractures, especially in areas like the spine, hips, and wrists, these fractures might cause posture changes or joint deformities during the healing process, indirectly affecting the appearance of hands and feet. Therefore, it is very important to prevent osteoporosis and maintain healthy bones by getting enough calcium and vitamin D, engaging in regular weight-bearing exercises, and avoiding smoking and excessive alcohol consumption.