Quick Sketching the Human Form

I am trying to improve my ability to quickly sketch the human form.  I did several one minute sketches followed by a few two minute sketches and then finally this one of 5 minutes. I used the site Croquis Cafe , it has a weekly model that takes a different pose for each sketch.  It is also free which makes it nice.
Quick sketching doesn't give one the chance to take measurements, which is perfect when trying to journal a scene quickly, before everyone moves.  Done in graphite in my 9" x 6" Bee Paper the Only Sketch Book you will ever need.