I am 79 in excellent health and work out in a gym for a full hour 7 days per week !

I am 79, in excellent health, and work out in a gym for a full hour 7 days per week! I have been doing gym workouts like this for the last 50 years. I really don't get ill and when I do, it is of very short duration. At the end of every day's one hour intense workout, I am not even breathing hard. I do not smoke, nor drink alcohol, nor have every done narcotics. I also take 40 GMs of Vitamin-C every day and have been doing this for the last 40 years. Simple advice for along healthy life !!!