I was diagnosed yesterday with a kidney stone. Five days ago (my last ride) I was so tired and my heart rate was racing up so high that I had to cut my ride in half. I knew then that something was wrong. I chalked it up to dehydration but then the back pain started. I've got an appointment with a specialist today and I plan to ask lots of questions, including when I can get back on my bike. Honestly, I'm too scared to ride right now. We're experiencing temps in the high 90s...by 10 a.m. it's already 85 with 100% humidity. My worst fear is that I'd be out in the country, alone, and my kidney stone would decide it wants "out"! I'll re-post after I speak with the specialist today. Hopefully this thing will resolve itself soon and I can get back on my bike. Seeing other cyclists on the road has me burning up with jealousy!!