If you do alot of exercise, im talking about in general not just this one day,
Theres something called jumpers knee,
there is a more technical name for this but im unsure of it.
It is basicaly a long term exercising injury, which basicaly means its from over exercising
Alot of runners, bikers, basketball players and freerunners get this.
Symptoms are achcing kness and somepeople can feel a sort of lump under there knee cap.
I have really achy knees and have always thought i could have this but never been to the doctors about it.
I knew loads about it but have forgotten it all now, al try and find some more information about it when i have time and let you no some more