Except for people who are naturally thin, the secret of being strong is not as complicated as imagined. Systematic exercise and eating high-calorie food are enough to effectively increase people's weight and muscles, but I still advise you to keep your mind straight. Appearance and physique are only superficial aesthetic phenomena. No one doesn't like beauty and health, but intuitive impressions can't replace deep feelings. If you want to understand people or society, you should communicate with others in a more diversified way.
In a word, health is more important than health.