Singer and actress Jeong Eun-ji and Lee Jun-young revealed that they gained and lost weight for their roles.

On Nov. 1, the broadcast of KBS2's 'Problematic Men of the Rooftop' featured leading actors Jeong Eun-ji and Lee Jun-young, who appear in the Wednesday-Thursday drama '24-Hour Health Club'.

Lee Jun-young, who plays the role of a gym director in '24-Hour Health Club', said, 'I came to the rooftop to meet (Kim) Jong-kook. I wanted to see him because he looks so good, and I've also been enjoying the YouTube channel you're running.'

As the work is set in a health club, discussions about the body were unavoidable. Lee Jun-young stated, 'I have a body type that doesn't easily gain weight. I bulked up to play the gym director role by eating about five meals a day.' Currently, his body fat percentage, after losing all the weight gained during bulking, is estimated to be 13-14%, and Kim Jong-kook analyzed that 'his abs are slightly visible.'

Jeong Eun-ji, who took on the role of 'health newbie,' initially had a strong connection with exercise. Jeong Eun-ji remarked, 'I started exercising to survive because my disc issues were severe. My role model is senior Kim Jong-kook. I think the rumors about me helped me land this role after I started exercising, so I feel like health is my benefactor.'

Jeong Eun-ji said, 'I appear to have gained about 9 kg from the first part to several parts. I gained 9 kg for the role. I knew I had to lose it again while definitely eating late-night snacks, so I gained weight by eating chicken breast.'

She continued, 'It's the first time I've gained this much weight during activities. It was really hard to lose all the weight while bulking up and gaining fat,' and explained, 'It took a month and a half to lose it, and I lost it in two weeks. I did cardio three times a day and ate mostly vegetables after 6 p.m.' Kim Jong-kook marveled, 'You're seriously working out properly.'

The ability to freely adjust weight for a role represents a key indicator of a professional actor's commitment. Jeong Eun-ji shared a touching story that she started exercising 'to survive' due to her past disc issues, emphasizing that health has brought her new opportunities beyond simply maintaining her well-being.

Meanwhile, KBS2's Wednesday-Thursday drama '24-Hour Health Club', featuring Jeong Eun-ji and Lee Jun-young, airs every Wednesday and Thursday at 9:50 p.m.

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