2 PM Uyoung revealed a photo of his muscular arms on his Twitter. 

The photo captures Uyong wearing a tank top and exercising in his gym. 

Uyoung was mostly known as a sweet and cute guy, but this photo shows his masculine side to the surprise of the fans. 

Netizens responded as "Wow, he has great body behind the cutie face," " Now he is one of the beast-dols." etc.