[All] GD, who has strong arm muscles rather than a skinny body

I was able to see a surprising charm in the photo posted on G-Dragon's sub-account Instagram. Contrary to the image of G-Dragon, who I thought was a skinny guy, he had well-toned arm muscles. I was surprised when I saw the photo. I wonder how much he worked out. It's not easy to have muscle with a skinny body, but it looks like he really took care of himself.