I'm doing some studies on male anatomy regularly so i think i could share them with you.
I often combine the muscles into groups for easier use and a better understanding of the functionality.
It's easier to split them up at a later point to accentuate tension in some areas.
One last tip! If you are new to anatomy don't try to learn all of the muscles at once. It may result in ANATOMYPHOBIA ...    
or you simply forget half of them overnight. Regular studies of a single part of the body are a good way though.
Just don't give up and think about it like bob ross. Every muscle needs a little friend   

Ganbatte kudasai!!!
Nashi
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