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O.M.G. Let me share my Saturday long run..
9 miles was the goal - conditions were surprisingly "cool" for west-central FL: low-80s and humidity around 70% at 6:45am. First half was in full shade and not bad at all - I actually felt really good and strong through mile 5. By mile 6, the sun was up and it was hard to find shade, and the temp was around 90. Tunnel vision, chest constricted, nausea, despite taking in 30 ounces of Nuun during my run, on top of 16 ounces pre-run and lots and lots of water the day before. By mile 7 I felt like I was sweating pure salt and it was burning the heck out of my eye, lips and cheeks. Lots more walking than I wanted to do over those last few miles and at mile 8, I stopped at my pool, pulled off socks, sneakers and iPhone and jumped in for a couple minutes. It cooled me down enough to finish the last mile.
I got into an ice bath immediately after a cool-down walk and sucked down Gatorade 3 and water. All told, I lost 5 pounds on that run, battled a pounding headache for another 12 hours, and am only now starting to feel "normal" again.
So here's my lesson learned/ advice for others: SLOW. IT. DOWN. Yeah, yeah, I already knew that; but I didn't do it. Not enough, anyway. On my short, fast runs, I average just over a 12:00/mile pace; that awful 9 miles averaged a 12:56/mile. Looking at the data, I was running around a sub-10:00 pace during a lot of my run intervals. In retrospect, I was overheated, not under hydrated, and probably pushed it close to the edge of being dangerous.
Ladies, don't be me.
I hereby vow to take more frequent and longer walk breaks on my next run and will run slower, focusing only on completing the distance, not going for speed.