>>10075930Gesture isn't for anatomy so much as speed and getting the general form down on paper easily. For details you have to study details.
I recommend you watch the Tsugumomo artist draw sometime, he streams his manga process almost completely and he does extremely detailed anatomical sketches when he's doing the roughs for action scenes.
https://www.youtube.com/c/yoshikaduHe chats with his viewers in japanese, sometimes he goes out of his way to explain anatomy details.