Anatomy of the calf (posterior leg)

I ve got a sore calf from too much running on tarmac. Let s have a look at the anatomical structures in the posterior leg (calf) and work out what s going on. There are 2 layers of muscles, a superficial vein and nerve to look at, and a neuromuscular bundle between the muscle layers. Help me with my charity 100km run: Daily Anatomy App: