The Best Free Pose Reference Sites For Figure Drawing
Crossing the arms can indicate defensiveness.
Once you have done that, you can go over and render with more detail and tone.
Pick up your references and focus only on the Line of Action! If you still tend to keep yourself for too long on details, set up a timer, so you force yourself to move on to the next pose! A more effective way to practice this is to be aware of them, even in a regular setting.
The human body is very complex and gesture attempts to simplify the body as much as possible.