This quick charcoal sketch on newsprint is from a reference photo by jocelynsart from the Wet Canvas RIL. This sketch isn't great except that it loosens the hand, arm and brain to begin thinking in terms of space, shape, form, etc.
Then I went to Pose Manaics and quickly did a couple of line drawing sketches of a male figure. While there I also tried contour drawing and those poses I won't share with you although they were a good exercise in training the eye to see the shape/contour of the figure. When contour drawing, one never takes the eyes off of the figure, drawing the contour of the figure. It is amazing what the results can be. The drawings, as anything does, becomes better with practice.