Research indicates that being physically active can help prevent or delay certain diseases, including certain cancers, heart disease and diabetes, as well as alleviate depression and improve mood. Inactivity often accompanies age, but it is not necessary. Check with your local churches or synagogues, senior centers and shopping centers for training and walking programs. As a physical exercise, your eating habits are often not good if you live and eat alone. It is important for successful aging to eat nutritious foods and avoid empty calories in sweets and desserts.