After some thought, Kim So Eun replied, "A 50-episode long drama is not easy for an actor. You not only have to take care of your stamina and health but you also have to maintain the [on-screen] chemistry to make sure its consistent. Song Jae Rim takes good care of himself on his own. So I don't really worry, and I don't think I need to give him any particular advice."
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Kim Gyu Ri added, "When I was thinking of starting fitness, Song Jae Rim handed me a detailed list of products." Sounds like Song Jae Rim is the go-to man for anything health and fitness-related!