To conclude, here's my last bodybuilder drawing in a back pose. This is another back double-bicep pose only slightly different from the first. In this pose the biceps are not so tight, but they are still tense.
I am very happy with my results from the bodybuilder designs, especially with my performance in the back poses because it was the point where I stood out the most.

If you liked this drawing, feel free to comment or favorite if you wish.