One of the best things you can do for your body and to improve your health is being physically active. No matter what your age, get your body moving!
Being physically activity will strengthen your bones and muscles. This will help with balance and decrease your risk of falling. It's important to preserve your bone density as it can decrease with age, especially for women. When you exercise, your body releases chemicals known as endorphins. These cause a positive feeling which can help with anxiety and depression. When you are trying to lose weight, most people diet and don't do any physical activity. It's important to exercise so you don't lose your muscle and bone mass. Exercising on a regular basic can improve your heart health. It will lower your risk of getting heart disease and improve your cholesterol and blood pressure. Not being active can increase your risk of not being able to do simple daily tasks. Find activities that you enjoy that will bring you to a healthier you.
Activities can include, walking, dancing, riding a bike, gardening, swimming, jumping rope, etc.. You should be getting at least 30 minutes of exercise 5 days a week.
Source: http://www.healthinaging.org