Why do people become bow legged in old age?

People may become bow-legged in old age due to the weakening of muscles and ligaments around the knees, leading to misalignment of the legs. Conditions such as osteoarthritis can also contribute to joint degeneration and deformities. Additionally, prolonged wear and tear on the knees over time can result in changes to bone structure, causing the legs to curve outward. Genetics and lifestyle factors, such as obesity, may further exacerbate this condition.