I'm not sure what the content of that fast slimming exercise is.
So the impact doesn't affect me. I dare not say.
But doing proper exercise every day can help you grow.
Pay attention to nutrition when you grow up.
Overnutrition leads to obesity.
If you are still in high school, you don't need to lose weight. I believe that intense study in senior three can make people slim down.
Your father is worried about you, too. You can discuss with your father that the previous exercise was done every other day, and there was no side effect in fitness.