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Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

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Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Ben Z on Tue Feb 21, 2012 10:57 pm

What do you do in high temperatures and heavy sunshine? Do you go sans shirt? Singlet? Short-sleeve tee? Long-sleeve tee?

I tend to run shirtless but I am always intrigued by the ultramarathon runners and triathletes who wear the all-white clothing. I have tried to wear an all-white compression top, long-sleeved, in 100 degree weather with sunshine and thought it made me a lot warmer. Not cooler.

But from what I have read some people feel that after a few minutes, when you start sweating, the shirt helps to cool you better by spreading out the sweat rather than allowing it to drip off your body. The big Dane (see below) was a big believer in this and even wore white gloves and stuck ice cubes in them when racing in Kona.

Thoughts?

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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  ounce on Wed Feb 22, 2012 8:24 am

I'll wait until it's dark to run.

And I don't want to cause nausea to other runners, sans shirt.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Nick Morris on Wed Feb 22, 2012 9:43 am

I normally go with a white singlet and have never gone shirtless.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Dave Bussard on Wed Feb 22, 2012 10:06 am

I usually run without a shirt from June until September... Usually spray sunscreen on my back, arms and bald head. Always wear sunglasses.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Dave-O on Wed Feb 22, 2012 10:29 am

Shirtless. It feels much cooler.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  mul21 on Wed Feb 22, 2012 10:39 am

@Dave Bussard wrote:I usually run without a shirt from June until September... Usually spray sunscreen on my back, arms and bald head. Always wear sunglasses.

This, except I wear a hat to keep the sweat out of my eyes. And I still have a little bit of hair!
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Michele "1L" Keane on Wed Feb 22, 2012 5:15 pm

I can tell you that I helped someone train for their first Badwater in Death Valley one Memorial Day weekend. I wore a long sleeve white shirt made out of special material for the sun and heat, long pants, and my French foreign legion hat. I only ran 12 miles in the morning when it was 102F, but I was not stressed at all. As for the no shirt, I would get arrested.




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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Jack_Scaff on Thu Feb 23, 2012 12:49 am

@Ben Z wrote:, when you start sweating, the shirt helps to cool you better by spreading out the sweat rather than allowing it to drip off your body.

Not really spread it around, but help it evaporate better (semantics, I guess?). The way I understand the science behind sweat, cooling and wicking fabrics is that it is actually the evaporation of your sweat that helps you cool (think of running in humidity - your sweat does not evaporate). A good, wicking shirt actually helps your sweat evaporate better than running shirtless, so your body is able to more effectively cool itself. So I've been told.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Ben Z on Thu Feb 23, 2012 9:25 am

@Jack_Scaff wrote:
@Ben Z wrote:, when you start sweating, the shirt helps to cool you better by spreading out the sweat rather than allowing it to drip off your body.

Not really spread it around, but help it evaporate better (semantics, I guess?). The way I understand the science behind sweat, cooling and wicking fabrics is that it is actually the evaporation of your sweat that helps you cool (think of running in humidity - your sweat does not evaporate). A good, wicking shirt actually helps your sweat evaporate better than running shirtless, so your body is able to more effectively cool itself. So I've been told.

That makes sense. I am convinced in Badwater-type conditions an outfit like Michele's is in fact cooler than running shirtless.
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  mul21 on Thu Feb 23, 2012 9:44 am

@ounce wrote:I'll wait until it's dark to run.

And I don't want to cause nausea to other runners, sans shirt.

Based on your avatar, I'm not sure you really even needed to post in this thread! affraid
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Re: Running in Hot Temperatures and Abundant Sunshine - Shirt or No Shirt?

Post  Mike MacLellan on Thu Feb 23, 2012 2:20 pm

Shirtless. I usually try to find somewhere to dunk my head if it's really hot and the run is over an hour or two.

Makes me keep my eating habits in check during the summer, too. Very Happy
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