Yes, when I was taking life drawing classes in animation school, every class opened with about 15 minutes of 10-60sec poses, followed by some longer poses, as w

Yes, when I was taking life drawing classes in animation school, every class opened with about 15 minutes of 10-60sec poses, followed by some longer poses, as well as chunks of lecture from the teacher on how various body parts are put together and how to think about that on the page. Those short poses seemed impossible at first but very quickly became pretty good. Later on a regular exercise at one of the studios I worked at was "cartoon life drawing", we'd pause a video tape on a good frame from an old WB cartoon, and draw. There was a built-in timer since the VCR would only hold a single frame for so long before saying "okay we're playing again now".