In the face of their ridicule, we need not take it to heart. What we have to do is to persist in being ourselves and do a good job in exercise and fitness. As we all know, fitness can improve our body's immunity and reduce the number of times we get sick. Fitness can keep us in good shape and temperament.
In the face of his ridicule, we can also regard this ridicule as a kind of motivation for our fitness. If he is someone you know, you can make yourself a master of fitness through several months or even a year of fitness, and then walk up to him and let him look at your fitness achievements and feel ashamed.
Then why did he laugh at your fitness? Does he think that his figure is already very good, his body is already very healthy, and he doesn't need to exercise, or does he think that your fitness can't be sustained at all, or it is ineffective? If so, then you can show it to him, let him find out how stupid his idea is and give himself a beautiful counterattack.
And in the process of fitness, you can meet many like-minded and interesting friends. What should I do if I meet a little brother who likes your fitness very much? This will not promote marriage. Or maybe later, after he feels your change, he wants to go to the gym, and then when he comes to consult you, you can laugh hard.
But it doesn't really matter. The important thing is to be yourself, and the rest is decided by time.