Game Art Institute - Artistic Anatomy by Eric Wilson
https://www.vertexschool.com/artistic-anatomy-with-eric-michael-wilson

In this course you’ll learn from Eric Wilson to improve your anatomy and learn the anatomy lessons that everyone else skips. This is an on-demand, 10-module master class where he gives you demonstrations. You’ll spend around six to nine hours a week sculpting and resculpting your work and going through the exercises assigned.

Even with just a beginner's level of understanding, Eric will guide you to focus on the essential morphology and artistic anatomy principles inside of ZBrush that will make an immediate difference in your work. The key, you’ll learn, is to focus on morphology more than the actual insertions and origins of muscles. To see the big shapes and be able to move those big shapes to help you create dynamic figures.