10 rounds of 10 wallball (20 lb - 10') + 10 box jumps (24") Workout

M/ 39/ 135 lbs/ 5'-6"
I modified this WOD EARLY this morning to be:
10 rounds of 10 reps Wallball 10' with 20 lb ball and 10 box jumps 24"
15:45 (not the best time but a good workout)
I did this super early in the morning at the Museum across the street. I did my box jumps on a high concrete sloping wall... I know where it's about 24". I messed up and wasn't paying attention and really badly scraped my shins.. first time on the concrete ... OUCH! in the 6th round.
I walked it off and continued.
I had worked out late the night before as well, so my body was a bit tired and sore. I did stretch for quite a while before doing this, but I need to do that for really early morning WODs to allow me to really push adn not get prefatigued.