With age, bones tend to shrink in size and density, weakening them and making them more susceptible to fracture. You might even become a bit shorter. Muscles generally lose strength, endurance and flexibility — factors that can affect your coordination, stability and balance.

Age spots on the legs are incredibly common and normal. They are especially common in people 40 years old and older. Areas of the body that are exposed to the sun, like the hands, face, arms, and legs, can develop aging spots. Exposure to sunlight causes melanocytes (pigment-producing cells in the skin) to multiply.

Sagging skin of the upper legs is often a sign of aging. Moreover, the lack of firmness in your legs may encourage bone density loss and reduced muscle mass. The most common cause of sagging skin is aging. However, rapid weight loss can also contribute to sagging skin. One of the best preventatives of sagging or loose skin is exercise.

Weak legs are a common problem in seniors because we lose muscle mass as we get older. As we age, we tend to become less active, and this causes a reduction in our muscle strength. While some physical conditions can cause leg weakness, chances are, your weak leg muscles are part of the aging process.