Quote Originally Posted by Zen View Post
Cramping quads and cramping gut? SERIOUS electrolyte depletion. Look into Nunn tablets and Endurolyte caps

You can die from that.
Co-sign on the Nuun. Nuun has completely eliminated calf cramps for me. I routinely ride in 100+ degree temps in the summer.

I haven't read all of the replies yet, so I apologize if this has been asked/answered already, but was this ride a significant increase in duration, distance, or effort from your riding recently? Was heat the only factor different from your normal riding?