My superior in his 75 years look very good and when somebody ask about his secret he always saied: "I have a good wife" :) So i think harmony in your family and correct food are a passport to success.
Yes family supports our health but that enough is not the key for that, we have to take some steps too, I walk nearly 1 hour in the morning and 1 hr in the evening I would say that it gets me rocking.