So lately when I've been skating my legs - knees and below - have been getting tired really fast and I can't seem to figure out the reason why. I've been skating basically everyday, but even after taking a two day break they still got tired pretty fast today. I've come up with a few possible reasons, but maybe someone could tell me what's the most likely: 1. Summer heat, 2. Skating in vulcs, 3. Not resting my legs enough (but I'm 19 so...), or a combo of all three. And does anyone know of any basic exercises I could do to possibly fix or improve my situation? Thanks for any help, pals