The arm holding the shield is disproportional from his whole body. Actually, the whole body needs some proportion work, try making the legs a bit closer, and the arms a bit wider, fore arms arent sticks, the are wide from the elbow and get thinner to the wrist. The torso also needs a bit work, its more rectangular than trapizoid shaped like most male bodies. the broad shoulders are the good point in the picture, but overall try harder. Keep it up.