I have recently been brushing up on my quick sketching skills and body composition sketches. This can be hard without a live model or one of those fun little wooden joint men. Thankfully while at undergrad I was introduced to a lovely website that is my own personal traveling model.
This lovely site allows the drawer to do timed sketches 10 seconds - 90 seconds of computer generated models. What I love about this site is the muscle structure of the model is exposed so if you are like me and like to know what is attached to what while drawing, you can see every bit of tissue and bone.
Some poses are not as beneficial to a costumer than others, but the ability to quickly get the general shape of a model down on paper is a valuable skill. I do not use these poses for designs, but as I said, practice will make perfect. And, I never know, I MAY design a character that lies down all the time, so the lounging models will come in handy.
Whether you use posemaniacs.com or some other site, a weekly or daily sketch session of poses will allow for a better undertanding of the body and through that the cloth and other materials we design to top it.