<human>: Condense the text into a few key points

Background: 23 y/o, male. In high school I was a 4 season athlete. Football in the fall, indoor track in the winter (600m), lacrosse in the spring, and two-a-days football training in the summer. I went to college, had a severe skiing accident (broke both wrists), I had significant muscle atrophy after three months of just laying around... I rock climb and run the Spartan series races (among other things). 

I need some motivation to get back on the horse and get my ass in shape. I'm sitting behind this desk for 9 hours and I can just feel my former atheticism seeping out of my pores. Sad times. Give me a kick in the ass r/running!
<bot>: I need to get back in total shape. What motivates/motivated you to get back into running for a full cardio workout?