Life Drawing Studies for printmaking

Recently I have been doing some life drawing studies to improve my drawing skills (both tonal as well as line work, proportion, ect), particularly with the anatomy of the body to understand how I can distort the body. I feel I need to understand where particular muscle groups are, how certain features look, before I can then begin to distort the body itself, otherwise it will not work out quite as well.

Life drawing study, 20 mins, 2013

Life drawing study, 20 mins, 2013

Life drawing study, 20 mins, 2013

Life drawing study, 20 mins, 2013

My style of drawing is very tonal, which allows the body to look more robust and life like. I enjoy this style of drawing, as I mentioned before that I find it hard to draw lightly or uses light washes of color. I prefer strong contrasts and heavy line work over softer lines, act. I feel it adds to the atmosphere of an artwork, usually my works are moody and at times dark. I naturally gravitate towards darker works, perhaps because I feel it evokes an emotion from myself that I value deeply, I don't know. This is what I am experimenting with in my current body of work. 

These are only studies towards my final body of work. They are not grotesque in any way, they allow me to understand how body parts relate to one another. After doing these studies, I will now begin some print making using facial features and begin to distort them.