During the talk, Yang Seung Chi, who's the body trainer for many stars including Kim Woo Bin, Sung Hoon, and�BTS' Jin, named�Kim Woo Bin as the one with the most dramatic change in physique.�

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He explained, "Kim Woo Bin had very narrow shoulders and was similar to Kim Guk Jin�when I first met him. But he stuck it out until the end whenever I made him do a workout."