There are almost 100 muscles explained in this DVD. I explain/show the origin, insertion, and actions of the muscles. I also explain/show the Trigger Point locations and possible referrals for the muscles too. When a client comes in with pain, then you need to know what muscles to treat. It doesn't matter how much Trigger Point Therapy knowledge you have, this video will help you understand it better, and it will also give you many easy ways to remember them. This DVD is almost 2 hours long and its all lecture, while performing the techniques!