9 hours. u only getting that little sleep during the week is y u sleep so much on the weekends. it's called catch up sleep. i know it's rough and everything w/ school and everything else, but try to get atleast 8. good ways to do this r to turn off ur cell phone and to lay in bed about 15-30 mins. b4 u plan on going to sleep so ur body can relax and then take itself to sleep. good luck. getting more sleep will definitely help u in everyday activity.
Sleep is one of the most important aspects of recovery, and keeping a sharp, sound mind. Don't get enough of it, you arent going to perform at your full potential, especially if you are training hard.