Please recommend a place in Incheon Michuhol-gu that provides good personal training.

The child isn't overweight, but wants to go on a diet. These days, kids are too thin.ㅠ

Starting tomorrow, it's vacation, so I'll sleep in, and I'm thinking of maintaining a regular routine and doing physical therapy during the break. I feel like I might just starve myself otherwise. I want to make sure I can eat while exercising. Please recommend some good places in Michuhol-gu, Incheon.