A long, healthful life is a goal for many. And one thing can have a big impact on whether that goal is achieved – find out what it is! Want to add years to your life? Make regular, moderate exercise part of your healthy lifestyle routine. Physical activity is good for the body, mind and spirit; helps maintain and improve the health of your heart; reduces the risk of diseases such as diabetes and Alzheimer's; promotes energy, quality rest and a healthy weight; helps manage unhealthy stress; and may alleviate mild to moderate depression. So why isn't everyone exercising? People can always find excuses not to exercise, but really - there is no good reason. To reap all these benefits, all most people need is 30 minutes of moderate aerobic activity at least four days a week, including at least two days of strength training, and a stretching routine. It's simple to begin: rent fitness DVDs, download a workout app as a guide, join a gym, make an appointment with a personal trainer or simply get some friends together for daily walks.