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Does Covering Up Keep You Cooler?

Global Triathlon Network

8,953 views

When it comes to racing in the heat, we often think less clothing means staying cooler. In this video, we put that theory to the test with two hard efforts in different kit to see how much clothing choice really impacts your body temperature. Plus, we take a look at the science behind modern trisuit fabrics and cooling technology.

00:00 Intro
01:10 Test protocol & metrics
03:07 Test 1
04:15 The evolution of triathlon clothing & cooling tech
06:48 Test 2
07:55 Does cooling tech work?
10:47 Material choice and layering
14:16 Interpreting the data
20:19 Body temperature during the swim
21:39 Key takeaways

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Would you stick with a trisuit on a long-distance race, or do you think it's worth getting changed for comfort on the run? Let us know in the comments below! 👇

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11 Comments

@gtn Creator 16 hours ago Pinned

Would you stick with a trisuit on a long-distance race, or do you think it's worth getting changed for comfort on the run? Let us know in the comments below! 👇

@GeneKagan 4 hours ago

You need another test for Tom with the water splashing/ carrying ice in those pockets and then mesure his effort and skin temperatures etc aswell.

@marie-louisekarlander2366 37 minutes ago

I used long sleeve when I did Kona 2023 and even I had thin arm sleeves. I didn’t know that it was probably more aero but I had them wet from the beginning of the bike. I wet them sometimes when I biked. I really don’t like hot weather, but I was adapted. I was two weeks first in California, more hot than Kona. 10 days in Kona.
In the run I changed clothes, so nice, never done before in a race, shorts and a thin top (t-shirt) I kept my arm sleeves , continued to wet them. I also had one special cooling towel around my neck both in the bike and run. That material felt like something we use when vax the car . I didn’t find one similar on the market. I had it from my husband. He had it from his work.
I never actually been stronger the last 12 km in the run in a Ironman than in Kona. I done 10 IM.
I will take those experiences with me to Chattanooga next year. It will be similar conditions actually.
Like always - nice video.🙌🤩

@joemoya9743 5 hours ago (edited)

The problem with Ryzon is that the Graphene material does not stretch well. As a result, if the suit is not specifically cut and fitted for you, you will have lots of wrinkles and the aerodynamics on the bike is poor compared to traditional material.

@SubtleForces 10 hours ago

Glad I don't have to take off clothes to be warmer when the Canadian winter comes very soon ;-)

@alejandroneri8782 9 hours ago

Amazing ❤❤

@MA2210-Free 15 hours ago

A factor you didn’t mention was impact of sunscreen on sweat rate. My perception is that my cooling from sweat is reduced by waterproof sun screens, so I prefer a sleeved tri-suit for hot weather tris; or a run vest over bare chest when running

@MatthewGiannandrea 14 hours ago

My last 70.3 I used an ice bandana that I filled and kept cold until T2. I was able to quickly put it around my neck and shove it under the back of my tri-suit. It helped keep me cool for most of the run and the tri-suit helped keep the ice from bouncing around too much.

@karstenmeinders4844 11 hours ago

Not so convinced: the trick is to wet your suit with water from the aid stations (or in training, from extra bottles on your bike or when running, from a depot or accompanying biker). So the suit is always watered and the need to sweat is reduced. If air moisture goes crazy, the effect might be lower though.