Because of my work, I have known and helped many friends lose weight, and I have lost weight myself.
Let me give you a few examples that I saw with my own eyes around me:
1, I was injured in the game. After I recovered, 1 month lost about 29 kg.
2. One of my teammates gained weight after leaving the team and began to lose weight after returning to the team. 1 month lost 33kg.
My wife gained weight after giving birth. She lost 53kg in more than four months, and nearly 20kg in the first 1 month.
4. A female friend of mine, who plays badminton for 3 hours every day, lost 26 pounds 1 month.
There are too many, so I won't list them one by one.
People who come to our place for exercise every day, if you count the average.
It is quite common for girls to be thin 1 month 17 ~ 25kg.
It is not uncommon for boys to lose 20 ~ 35kg per month/kloc-0.
In short, it is really appropriate to say "you must pay for it".
I wish you success!