The weather in North Carolina during the summer can be brutal. Triple digit temperatures and high humidity combine in ways that makes even the short trip from the car to my office building miserable. Running in such conditions is almost as much fun as punching yourself repeatedly in the coinpurse. But, you deal with the hand your dealt. I took to getting up before dawn in the height of summer to hit the trail for my long runs. Otherwise it’s just punishing.
During the week for my shorter runs I wasn’t so fortunate. I run at lunch. It’s what I do. And I paid for it. But in many ways I think that some training in those conditions can have a positive effect. That way if you’re racing in anything more comfortable it feels like cake. Compared with 100 degrees and 90% humidity, anything else is a nice springtime outting.
So with the summer of speed in effect I had a couple of faster runs this past week in prep for my first 5k of the season this coming Saturday. And North Carolina being what it is, summer came for an early visit. On Monday I had a 5x800m interval workout at a 6:50 pace. That day wasn’t too bad, with a temperature around 85 degrees and humidity near 40%. Still, that’s the workout that let me discover my maximum heartrate: 189 or so. I’d always thought my max heart rate was somewhere around 180 given the classic “220 – age” formula and the fact that I’d never measured above about 178. Well, this day did it. I finished my last interval and could cheerfully have never run another.
Wednesday was a tempo day, 3 miles at 7:40. I’ve done 3.1 at 7:32 so I figured I could do this. It was pretty hot again, almost identical to Monday. After my warmup I was already pinging 162 on the heart rate monitor. This doesn’t bode well. After ramping up to pace I’m already bumping 170 in less than a fifth of a mile. A little under 1.5 miles in an I’m constantly at 177 and I finally take a break, breathing like a bellows. Gawd almighty. I end up taking two more walking breaks on a scheduled measly 3 mile tempo run, hitting 185 on the heart rate monitor on the back stretch up the only hill on the course.
Let’s see what effect the weather had. Pulling up Wolfram Alpha for some historical data on my unofficial 5k PR in June for crying out loud: about 75 degrees and 45% humidity. For that one I hit a maximum of 174 on the heart rate monitor. I didn’t even hit 170 until 2 miles in.
Perhaps “summer of speed” is a misnomer. Might be “summer of horror”.