Kim Hyun Joong looked almost 'unbreakable' after showing off his hardcore abs on KBS 2TV's 'Generation of Youth'.
Kim Hyun Joong didn't need a stunt man for the action scenes with his fighter figure and determination and went shirtless to show off the fruits of his labour, reported allkpop.
He shared: "At first, I tried to make the most sculpted body I could but as I thought about it, I realized there was no exercise equipment and protein supplements in the 1930s that we have today.
"That is why I just stuck to eating meat and vegetables and made a healthy body in a realistic way. So although you may think 'it's not that great of a body' as you watch my scenes, I hope you will keep in mind that I toned my body in consideration for the generation of the drama.
"For 'Generation of Youth', rather than using a lot of wire-like special equipment for the action scenes, we used our own bodies to clash with one another to fight. As much as my bruises increase after each filming, I think you will be able to feel the realistic action of the 1930s."
'Generation of Youth' is a romantic noir drama set in the 1930s centered around young fighters and their story of love and friendship.
Check out the gallery below to see other celebs who have gone through an amazing transformation in their figures.