This summer was one of the hottest summers on record. Several people have asked me how I managed to survive. My response: I didn’t notice. I didn’t notice it was unusually hot in spite of spending much of my time outdoors training for a marathon and doing my errands by bike. I didn’t notice precisely because, counter-intuitively, these activities caused me to sweat and my sweat kept me cool. How could this be?
For some reason our culture has an aversion to sweat. Our media keeps up a constant barrage of messages about how we must avoid sweating and that if we do somehow err by sweating we must hide it at all costs. Of course there is a place for personal hygiene and we must take care not to impose our old smelly sweat on our fellow citizens. But we sweat for a reason–to keep ourselves cool–and furthermore we are very good at sweating.
A recent Scientific American article described how one of the most basic ways our human ancestors gained an advantage over other predators is by our ability to sweat. No other animal sweats as well as we do. This ability enabled our ancestors to track large game until it fell over from heat exhaustion, a technique known as persistence hunting. Many other animals can outrun us for short distances. But we are the masters of long distance running on this planet. A human can run a marathon faster than a horse, because the horse will keel over from heat exhaustion before it gets to the finish line. And so how do we make use of this great ability of ours in modern times? Do we augment our ability to keep cool in some way as we have done with so many of our other abilities? No, instead we vilify anyone who sweats in public. It is outrageous to me that we subvert this great advantage we have for dealing with hot weather, then complain about the weather, then build big machines to make ourselves cooler, and finally watch complacently as these machines contribute to the very climate warming we were complaining about.
I propose that instead of looking at sweat as the enemy we learn to harness it for its intended purpose: to cool us down. It is much more energy efficient to cool ourselves individually (perhaps with motion or fans) than to use big energy-intensive machines to cool down entire rooms and buildings. And it is the height of hypocrisy and inefficiency that our cars are designed to be basically greenhouses on wheels. As a result they must carry massive air conditioning equipment to keep their occupants cool. Instead, cars could make use of our natural abilities to cool ourselves by sweating and combine that with the built-in breeze of their forward motion.
Air conditioning will be one of the first superfluous accessories jettisoned by our lightweight/narrow/slow cars of the future. What will replace it? Think about the vents cars have now and how they could be improved. It seems that no one in our bone-headed auto industry has taken the time to reconsider the simple air vent. What are some ways it can better put a breeze where it’s needed? For that matter, where is the breeze needed? Sweating effectively requires having airflow over one’s back. Current cars place your back squarely in a cushy seat with no possibility of air flow. What if for starters cars had mesh seats? What if we had the vents blow directly from the seat onto our backs? Or better yet, what if we had ventilated clothing that clipped directly into the car’s cooling system? And we won’t need any kind of sophisticated automatic temperature control. Just provide a steady air flow and your body will sweat or not as necessary to keep itself comfortable.
You are probably wondering “What if I don’t have one of those lightweight/narrow/slow cars of the future? How can I keep cool by sweating while traveling?” If such is the case I propose that you make do with an electric cargo bike, which is the next best thing to a lightweight/narrow/slow car of the future. Here are my tips for sweating more effectively in hot weather:
- Use an electric bike. Moving on an electric bike is especially nice since it can provide a breeze without so much exertion. And if you are on foot, my experience is that someone can actually stay cooler by running slowly and efficiently rather than walking. The faster airflow from running combined with sweating kept me cooler than the slower airflow (but less exertion) of walking. However, running efficiently takes practice. It probably also helps to be thin.
- Don’t wear a backpack while biking. Backpacks block air flow. Get a cargo bike so you can carry your stuff off your body.
- Wear sunscreen.
- Go shirtless. Don’t be a prude dude. Let the sweat out. But carry a jacket for when you stop.
- Carry twice as much water as you think you’ll need. You’ll need it.
- Only stay in the sun if you are moving. The airflow will keep you from overheating.
- Cool down in front of a fan after biking. You will notice a surge in body temperature after you stop biking, with a corresponding surge in sweat output. Don’t waste that sweat! Cool down with whatever breeze and fan and shade you can find. Only after the sweat has completely evaporated should you take a shower if circumstances require.
So this summer by following these simple tips I actually looked forward to biking and running as an opportunity to go outside and cool down. I did not let the weather reports dictate whether or not I could go outside. Don’t believe me? Try befriending your sweat!