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GOT7 were the guests on the latest airing of 'Cultwo Show,' along with rapper Cheetah. DJ Cultwo questioned Jackson, "I heard you lost 9 kg. Is this true?" Jackson replied, "Since SBS's 'Roommate,' I have lost around 9 kg." The DJs then joked, "I can't really tell [that you lost weight]." 

When asked to reveal the secrets to his weight loss, Jackson answered, "I exercise and drink organic green tea." Yugyeom cheekily remarked, "I think he's slowly turning into J.Y. Park. He really loves organic green tea, too," bringing laughter. 

Seems Jackson's exercise has been boosting his athleticism (or maybe he's naturally athletic!) as he told the MCs, "I can run the 100 meter dash in 11 seconds," much to everyone's shock. 

Jackson isn't the only one who is good at running; turns out Cheetah is a cheetah in human form. She said, "I used to run relay races. For a girl I was pretty fast. I have run 100 meters in 14 seconds."