First, his genes may be too good, just like some people have congenital heart disease and can't exercise vigorously, but some people have strong genetic system, better resistance and better metabolism than ordinary people.
Just like a girl who stays up late every night in our dormitory, her skin is still very good. what can I say? But God-given grace cannot be concealed. This is the meaning of physical fitness. Life is so wonderful.
Second, eat nutritious food. Eating is the most important thing. If you eat too much junk food, no matter how healthy you are, it may get weaker every day. But if you pay great attention to health and eat a balanced diet, you can slowly repair internal friction, your body will feel much more comfortable, and your physical quality will naturally not be much weaker.
I have a friend whose mother likes cooking with water and occasionally drinks some Chinese medicine soup. In short, the diet is light, but it is also very nutritious. Up to now, she is about 50 years old and still looks 40 years old. She doesn't dance square dance or anything, but cooks and washes clothes at home all day.
There are exceptions to everything. My friend is a little different. She eats the same as her mother, but she gets sick easily. This estimate has to go back to its original state. She is weak and can't help it.
Third, there are other ways to replace exercise. For example, traditional Chinese medicine health care, moxibustion, acupuncture, pedicure, steaming, etc., which are very popular in beauty salons, can replace the effects brought by exercise to some extent.
There is an aunt who has nothing to do at home all day. At most, she picks up the children, and the rest of the time goes to moxibustion, steaming, massage and pedicure ... Her physical fitness is also excellent.
In a word, exercise is just one of the ways to improve your physical fitness, not an inevitable condition, but a substitute. So if you don't like sports and your health is not very good, you can really consider diet therapy or do a health care project.