Singer Jang Woo Hyuk revealed a picture taken at the gym.

YEsterday, Jang Woo Hyuk posted on his Weibo, "Actor Jang working out," along with a picture.

In the picture, Jang Woo Hyuk is wearing a black sleeveless shirt, taking a picture of himself on the mirror of a gym. His buff arms revealed how hard he had been working out.

Photo Credit: Jang Woo Hyuk Weibo