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I recently read that at least one elite runner/coach (I think it was Frank Shorter) advises against sunscreen use during long runs because it interferes with sweating. I normally don't bother with sunscreen as I usually finish my runs by 7:30 a.m., but I'm wondering about later runs this summer.
i am so fair skinned i would be lobster red without sunscreen so for me its a no brainer, and maybe it does hinder the ability to sweat a little but i get plenty sweaty even when wearing sunscreen.
I'd be interested in seeing Frank Shorter's original reference. Most runners I know have no problem sweating copiously in the heat, sunscreen or not, which would indicate that sweat has no problem escaping pores. Personally, having fair skin, I'd much rather put on sunscreen (especially between 10 AM and 4 PM) than increase my risk of sunburn or worse.
Heart of the City Run, Los Angeles, CA, 24:13
Downtown Anaheim 5K, Anaheim, CA, 24:32
Claremont Turkey Trot, Claremont, CA, 24:20
The Great Race - Old Agoura 10K, Agoura Hills, CA, 51:12
Fiesta Days Run, La Canada, CA, 49:31
LA Cancer Challenge, West Los Angeles, CA, 51:21
Long Beach International City Bank Half Marathon, Long Beach, CA, 1:54:31
Not related to sweating, but sunscreens may not be doing what we expect them to do. Here's a link to AOLnews: http://www.aolnews.com/health/article/study-many-sunscreens-may-be-accelerating-cancer/19488158
Particularly sunscreens with Vit A may increase the incidence of cancer. Now a lot of these things you need to take with a grain of salt, but . . . I am an eye surgeon and we recommend vitamin A for patients with macular degeneration--among other vits/minerals. The studies showed that smokers who take additional vitamin A are at increased risk of lung cancer and there are special smokers preparations of vitamins without the vitamin A so I am inclined to believe that Vit A in sunscreens may be harmful. FWIW.
This sounds like a misinterpretation to me. For one thing, who puts sunscreen in their armpits, or on the middle of their back or their chest (assuming they're wearing a shirt or singlet)? Those are the areas I sweat the most, as well as my scalp. I'm most worried about being sunburned on my arms and legs, and those are also the areas where I'm not going to sweat as much anyway. I wear sunscreen on my face and neck too, but haven't noticed a lack of sweating!