I've been getting up and riding or running at 5:30. It sucks, but at least the heat isn't too bad. This morning it was 90 degrees on my porch when I returned from my ride just before 7 a.m. (admittedly, my porch faces east and traps the morning sun making it hotter than the surrounding area). I did an evening ride on Monday when the heat and humidity made it hard to breathe. The riding wasn't so bad (cycling is so much better than running in this weather since you create a nice breeze), but stopping was brutal. I looked like I had just come in from a swim.