Spending just a few hours a week in moderate physical activity after age 65 may cut your risk of early death by over 50%. A study examined the health habits of 2,456 citizens in Finland over a 12-year period. Physical activity can be almost anything involving physical exertion - activities such as gardening, fishing, walking, and playing shuffleboard can all engage your body aerobically. If you find it difficult to commit to exercising, seek an activity that you love. The intrinsic reward of enjoyment is key, and offers the greatest certainty that you will continue with it. It is never too late to start increasing your vitality, improving your mood, and possibly gaining a 50% or better chance of living longer.