I am a 6'3" 245lb 23 year old male, and have been experiencing knee pain for the past month or so. This happened when I was performing Verticle Jumps at a track practice. When I landed, i felt a sharp pain in the middle of my left knee. I did not feel any popping, just a very sharp pain right behidn the patella. I didn't think anything of it that day, and it never bruised or swelled. I laid off the knee for the remainder of the week, but when i started lifting the next week, anything that put stress on the knee hurt. Squats, Legpress, Deadlifts, they all hurt right at the middle of the knee behind the patella. It also hurts when I try to jog and occasionally go down stairs. I saw an athletic trainer and he believes that it may be a bruised femure. I was wondering if anyone else had an opinion on this, and if they agree with the bruised femure, how long do you think this will last/are there any treatments I can do to speed the recovery process/can i do any form of cardio?