LOL, I'm 55 and I have the same symptoms. Pretty sure that doesn't mean that I have the knees of a 16 year old. Or if I do, I should return themthanks for your input everyonei'm 16, the pain is usually in the front more towards the inside of my knees after i ride. They really hurt after sitting for long periods of time, i find it hard to stand up. After i get moving it generally goes away. Its usually just feels like its really sore. i don't usually stretch. I think thats it