In the July 7 episode he talked about a swimming related 'trauma' he experienced as a child.

He said, "After the fourth grade, I've rarely ever gone swimming. Before then, I even took diving lessons. But while learning how to dive, my swimsuit came off... And right behind me was a girl who was the same age as me and someone I liked. I was so embarrassed, I quit swimming the next day."

Kang Ho Dong asked, "Then why did you come on this show?"

Minhyuk said, "There are still things I'm hurt about and I have that trauma, so I want to overcome that through swimming. I also have weak lungs. So my breathing falls behind. I've come here to help improve my lung capacity."

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We hope Minhyuk both gets over his 'nude trauma' and experiences health benefits as well through this experience!