I think that if you want to stay healthy, you should at least do the following two things.
The first point is exercise. Many people think that keeping in good health means eating at home and doing things to keep in good health, but that is absolutely not enough. You need to keep exercising every day. Young people need at least one hour a day, and old people need at least half an hour a day. These are the most basic things. You can walk, run and practice Tai Chi every day. These are all ways to keep in good health and are very helpful to the body.
Another point is diet. What we usually eat is very important. Of course, we can't keep in good health for the sake of keeping in good health, that is to say, we can't change our living habits for the sake of health, which is definitely not worth the candle. What we should do is to make some improvements and changes in the original eating habits and living habits, so that health preservation becomes very simple and healthy.
In a word, if you want to stay healthy, you should combine a healthy diet with healthy exercise, which is the healthiest health.