On the July 11 broadcast of SBS Power FM's 'CulTwo Show', both Sunny Hill and EXO were guests for the special live section of the radio program. While the topic of muscles and strength was brought up, Joobi revealed, "I have both biceps and triceps. During MBC's 'Idol Athletics Championship', I won in the arm wrestling event, but it was all edited out from the broadcast so no one knows about it."

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Of course, she was asked to show a demonstration, and they matched her up against the weakest member in EXO, which was decided to be Baekhyun. Unfortunately for Baekhyun, Joobi showed off her strength and beat him although he did have the disadvantage of holding her wrists. Everyone was amazed by her power, especially because she definitely doesn't look like she holds that kind of strength.

Check out the segment around the 6 minute mark below.