Multiple US Olympians wore the dhamaSPORT cooling device on their wrists in Rio - Is it a solution for hot weather?

It's called product placement.

May as well have been a magnetic bracelet.

I wonder if a collar might work better? Or on ankles?

I cold use a couple for rock climbing in warm weather to combat sweaty hands, but at $200 each, a bit spendy.

Is this a sponsored article?

No. This is not a paid article. All the studies are being published in peer review articles.

Thinkaboutit wrote:

Is this a sponsored article?

As an engineer, it seems to me that using thermoelectrics would be highly inefficient and expensive. Large batteries would be required to get substantial cooling, and based on the size of the device I'd be concerned that the amount of cooling is not dramatic. I'd love to see their specs though. I have lots of ideas for improved cooling for runners, if any dhamasport people are reading this and interested in talking to a PhD student as a consultant let me know!

Kranthi Vistakula wrote:

No. This is not a paid article. All the studies are being published in peer review articles.

Thinkaboutit wrote:

Is this a sponsored article?

I'm serious. This definitely appears to be sponsored. Even links to the company's website. Nowhere on the page is that disclosed.

Brojos, what's the deal here? Writing sponsored articles without disclosure is super shady.

pop_pop!_v2.2.1 wrote:

It's called product placement.

May as well have been a magnetic bracelet.

Why not just use Rupp's ice-pack cap? Talk about verified endorsement.

If this isn't sponsored, it's the worst kind of lazy journalism: basically, they appear to have lightly rewritten a company-drafted press release. It reads and feels like an ad. Doesn't matter if there are peer-reviewed studies somewhere, this article reeks of "sponsored content." If you guys didn't get paid for it, you should have!

Thinkaboutit wrote:

Kranthi Vistakula wrote:

No. This is not a paid article. All the studies are being published in peer review articles.

I'm serious. This definitely appears to be sponsored. Even links to the company's website. Nowhere on the page is that disclosed.

Brojos, what's the deal here? Writing sponsored articles without disclosure is super shady.

whether the articles are peer-reviewed has nothing to do with whether this is paid-content. if this is paid-content, then letsrun should be disclosing it.

This is NOT paid content. Scott Simmons told us about the technology, we did some research on it, presented our findings in the article.

It only cools to 44F? That isn't that cold. I feel like it would be easy to find a cheap substitute to do the same thing.

Skips Arm Day wrote:

As an engineer, it seems to me that using thermoelectrics would be highly inefficient and expensive. Large batteries would be required to get substantial cooling, and based on the size of the device I'd be concerned that the amount of cooling is not dramatic. I'd love to see their specs though.

+1. Their website doesn't seem to provide the info I really want. Namely, how much heat is actually dissipated? Show me the Watts. They do cite some studies (although not peer reviewed, lacking detailed methods sections, etc) but these only address athletic performance, not the more fundamental matter of whether their devices are actually delivering a substantial amount of cooling.

My guess is that the magnitude of cooling is negligible. The device could still work based on the placebo effect, or based on the sensation of something cool against your wrist. But I'd love to see some actual specs proving me wrong.

If you bring the price down to $100 I would buy one just to see what happens.

Thanks for the article.

So, this is a heat sink that depends on evaporation to ultimately transfer its heat to the atmosphere.

I'm not a physicist, but can someone explain how could this be better than sweating?

dingle wrote:

So, this is a heat sink that depends on evaporation to ultimately transfer its heat to the atmosphere.

I'm not a physicist, but can someone explain how could this be better than sweating?

I haven't perused the website that closely, but I think it uses thermoelectrics to make the outer surface of the band hotter than your skin would be, and the inner surface, against your skin, colder. The hot outer surface therefore sweats more than you could, and also has higher rates of radiative heat loss.

I would like one of these too.

https://altium-i10.com/how-it-works/

What about dry ice canisters taped to your wrists.

You could recycle the CO2 into your hypoxianator while dropping your blood temps.

mileage_man wrote:

+1. Their website doesn't seem to provide the info I really want. Namely, how much heat is actually dissipated? Show me the Watts. .

+2

And yes, Letsrun, you just wrote a sponsored article for these guys. I think you're lying about getting paid for it, although I'll leave an open mind to the chance you're dumb enough to write content like this for free.

From the leading question in the title to the miraculous Chelanga anecdote, to burying actual product information halfway down the page, this is literally infomercial format.

Better yet, frozen nitrogen capsules at -260 and inhale the nitrogen for hypoxia.