Legendary K-Pop Idol Reveals Ongoing Struggle With Her “Dead Butt”

What happened to her butt?

In the latest episode of “Jaefriends,” a YouTube show led by Kim Jaejoong of TVXQ and JYJ fame, The Grace (also known as CSJH The Grace) members Stephanie, Lina, and Sunday guested and talked about their legendary K-Pop days.

The Grace on “Jaefriends” | @jaefriends.official/Instagram

While updating the fans on how they’ve been doing, Sunday revealed that she suffers from gluteal amnesia, also known as “dead butt syndrome.” Explaining the condition, Sunday shared how she “had a really hard time because of it” and that it’s still an ongoing battle.

The Grace’s Sunday | @jaefriends.official/Instagram

Kim Jaejoong: You have a dead butt…?

Sunday: Yes! It’s a real medical condition, you know? It’s called gluteal amnesia. It’s a condition where your glute muscles forget how to work. My glute muscles literally forgot what they’re supposed to do.

Kim Jaejoong: Is it some kind of syndrome?

Sunday: Yeah, dead butt syndrome. So even when I walk, I kind of waddle. I had a really hard time because of it, and I don’t think it’s back to normal yet.

As Kim Jaejoong remained fascinated by the idea of a muscle just giving up on its job, Sunday playfully added that people who know about her condition continue to check in on her butt.

| @STSEVEN_official/YouTube

Kim Jaejoong: So it doesn’t do its job?

Sunday: It doesn’t function properly. Isn’t that wild?

Kim Jaejoong: That is wild.

Sunday: So now, whenever people see me they ask about my butt. They’re like, ‘Oh hey, has your butt started working again?’ They check in on how my glutes are doing.

Kim Jaejoong: That’s fascinating. I’ve never heard of anything like that.

Watch the full episode here: