So I've had knee problems all my life (Not sure why exactly) and riding for extended periods my knees start to ache a bit and it's like I can't even move my legs anymore. I'm not tired or anything but my knees feel exhausted. I was wondering if there are any stretches or anything I could do before I ride or whatnot. I found that raising my seat higher makes it possible for me to ride for extended periods without much pain but if I ride for about 10 miles, the ride back kills me.
Also, would knee braces help or what? Hopefully somebody understands the kind of pain I'm talking about or experiences something similar and has suggestions.