It’s the humidity that will kill ya!
We all know how hard humidity can be on us. If you don’t know this, you live someplace you should never, ever, ever, ever move away from. I especially noticed this lately with some workouts and have had some fellow Functional Fitness junkies agree. Some of my favorite K-Bootcamp workouts from last summer have kicked my butt this year. I mean, I couldn’t finish them. I knew it was humid on those days, but I was dying!
There is actually some science behind this. As usual, I’ll give you my unofficial, idiot’s guide. You generate heat during exercise and your body needs to sweat to cool itself. Well in high humidity, the sweat doesn’t evaporate as quickly, which causes your body temp to rise. Also, the sweat loss from exercising descreases your blood volume, putting more work on your heart to pump the small amount to working muscles. This raises your heartrate.
Humidity = body temp up, heartrate up = you aren’t able to do the workout as intensely as usual.
More importantly than your ego here though is the serious health concerns of heat stress. Pay attention to headaches, fatigue (worse than normal), profuse sweating (again hard to tell here), and muscle spasms or cramps. If you are worried, it isn’t worth it – stop, get into a cool place and replenish your fluids.