Also, you probably already saw this thread, but in case not, there are some good links in this thread that are different from the ones listed here. An app, some 3D modeling, etc.
Another anatomy source just popped up on my feed. The NFPT (National Federation of Personal Trainers) has an anatomy review that’s on sale. Beverly Hosford, who I mentioned above, has a more extensive video than the one I listed a couple of days ago. The IDEA video is a 2-hour recording from a conference and it goes through about 30 muscles. The one she did for NFPT advertises that it goes over 100 muscles. What I like about her style is that she uses bands on a life-sized skeleton, as well as teaching you how to palpate on yourself to find the locations.
Last but not least, this is a particularly good book, and it has a companion workbook. I like it better than some of my anatomy books because it gives examples of “real life” movements that you can explain to clients. For example, plantar flexion is like pushing your foot down on a gas pedal.
Trail Guide to the Body: How to Locate Muscles, Bones and More