Nat's Sketchbook

[Fedodika]

for the leaping guy, id take another look at his forearm behind his head, make sure those contours line up because the ulna bone i believe doesnt curve that deep behind the wrist insertion. He also has really high cheek bones, and his arms feel tiny, mainly because you made his chest wider than in the reference.

youre pretty close with the other one, again just the forearm that isnt holding the cane, see how the contour of yours ends under the bicep, but in the photo its over the bicep on the top muscle, i believe its called extensor digitorum, its not a concave muscle. Also his naval is slightly off center, same with the abdominals, make sure they follow from a symetrical line from the sternum :)