The heatwave that hit much of the country the first week of July did not spare northeast Indiana. It was hot.
One of those hot days a friend asked me if I still went out to run in the warm mornings. Yes, I did (virtue signaled, please acknowledge – if virtue is its own reward, virtue seen is a close second). I am usually out at daybreak, and so avoided the worst of the high temperatures, but with a 75-degree morning the coolest part of the day, the 86-degree “real feel” put me well into the warm-running category. The 80% humidity didn’t help.
There’s a lot not to like about running in the heat, but there was something invigorating about it, too. Despite the sweat, it felt great. Was it a runner’s high from the heat causing more endorphins to be released? Were my muscles and joints more limber than on cold mornings? Or was it just the reward of my virtue? I asked Google why I was feeling so good, and I was told that one of the advantages of warm-weather running is, “increased maximum cardiac output (measured in liters/minute of blood flow) and increased blood plasma volume, both contributing to an increase in VO2max. (VO2max is the maximum rate of oxygen consumption, often referred to as the size of one’s ‘engine’.)”
Nothing makes you feel good like an increased VO2max.
This week’s morning temperatures, even “real feel,” have been back into the lower 60s. No virtue in such running and I think my VO2max may have decreased a bit. Still, there’s a lot to like about running in the cool(er) of the morn. Looks like we’ll be back to hot by the middle of next week, however. Get ready to rise, VO2max! Continue reading




