A 29-year-old man has reached the most vigorous stage according to his physiological age. If his body has not suffered from any diseases, his physical and mental health should have reached the most mature stage. If he wants to maintain this health and delay aging, he must follow the principle of disease-free prevention and disease treatment:

1. Diet and daily routine.

2. Don't choose to eat, don't eat too much for three meals, so that the stomach has room for peristalsis.

Step 3 exercise more

4. Eat less irritating food

5. Drink more milk and less drinks

6. Stay up less

7. Be cheerful and keep a good mood.

If the above points can be done well, I believe the landlord's body will be well maintained.