Exercises after watching the video on the shoulder muscles. Excuse how rough everything looks, its just my brain on a page figuring out the muscles :) So I got used to understanding the attachements of the infraspinatus, teres minor, teres major and serratus anterior. What I want to know is what is a good way to test my understanding of muscles and how can I further my muscle studies to better understand? Will be moving on to the rest of the back muscles in the next 2 weeks :)