No.
That's a rumor spread by an inexperienced person.
According to the scientific method, you want to be slim and slim, you want to be strong and plump, and you have a way to go.
Don't listen to other people's rumors, but also learn more about relevant knowledge and follow scientific principles.
I heard all kinds of rumors before I went to the gym myself, but I went anyway. The effect of losing weight is very good. I lost 20 pounds in two months and 40 pounds in half a year. Now I still spend my spare time in the gym and continue to consolidate my weight loss achievements. I like to kill time like this.
Fitness is a healthy and smart choice. Welcome to join us.