First of all, this is well done. Very well done. The structure and anatomy stand out immediately and the values are well presented. I think that the only way to take this further would be to complete the lower torso. The lumbar is implied, but it feels as though the upper body doesn't have any support.

Hi im new and nowhere your level haha, I would add that the lower back(near the abdominal) seem a bit too thin for the upper side

I like this! Such a strong pose. I think what could help would be focusing on the center of gravity.

Hey Nicole, thats a really good drawing. I couldnt do that at all. The only thing that I think you should add is the same kind of beautifull shading to the face. You have drawn out the facial features but not shaded it so that area seems unfinnished. The only anatomy part that looks off is his sixpack. Particularily the three packs further away may be too bulgy. You might wanna look at the Abdominal Muscles in general. I think the Pectoral in the front doesnt connect properly to them! Besides that I think your drawing is amazing!