4 ms·
Hmmm... what struck me is that this effect is local, i.e. the skin cells exposed to sunlight will store less fat, and the places usually prone to excess fat acc
by rob74 5y ago
Hmmm... what struck me is that this effect is local, i.e. the skin cells exposed to sunlight will store less fat, and the places usually prone to excess fat accumulation will rarely be exposed to the sun, even in summer. Of course, some sunlight will probably go through a t-shirt, while it certainly won't get through several layers of clothes...
- lobocinza 5y agoYes. An explanation for fat bellies.
- amelius 5y agoI see a business in t-shirts with a special print to grow a "fat sixpack".
- jagged-chisel 5y agoContributing factor perhaps
- eCa 5y agoRandom fact: A normal white t-shirt has a UPF of around 7[1]. [1] https://www.skincancer.org/skin-cancer-prevention/sun-protection/sun-protective-clothing/ https://www.skincancer.org/skin-cancer-prevention/sun-protec...
- sovnade 5y agoI've seen this number given before but I have literally never seen someone get a sunburn through a t-shirt. I've seen plenty of people with awful, terrible, red, peeling burns that required a trip to urgent care on their arms, and their torso is completely fine because they had a tshirt on. Is SPF 7 really all that's required? I usually use SPF30 sunscreen but it seems like that's overkill by a significant amount. edit: UPF vs SPF is a distinction I hadn't made before I guess. Is the difference in effectiveness that large? Does traditional sunscreen offer UVB protection also, but it's not advertised?
- kvdveer 5y agoI have a very sensitive skin. Unprotected in full summer sun (latitude 51 north), I'll burn within 15 minutes. In typical hiking attire, only my hands are in the sun, and I keep them in my pockets a lot of the time. My cheeks and lips receive only indirect sunlight, the rest is covered by a hat, sunglasses and a beard. In this attire, I've had sunburn through t-shirts a few times. They are never too bad, though, as I'll overheat way before I burn. In non-fully protected clothing, something else burns before my chest has the chance to. A major problem with sunscreen is that it degrades over time, and is severely affected by sweat and abrasion. I've read that you should be reapplying every 30 minutes. I typically don't reapply nearly that often, so some parts of my skin are not fully protected. Once those start to burn, I leave direct sunlight, so the skin under my t-shirt (which has consistent coverage) never really gets the chance to burn.
- Moru 5y agoI guess it depends on quality/thickness of T-Shirt. The cheap value-weight t-shirts you get at the supermarket is almost transparent if you hold it up to the sun. Heavy-weight t-shirts that are just a bit more expensive you can't see through at all and never got a sunburn through those.
- ineedasername 5y agoNot a hiker myself: What is typical hiking gear such that it (mostly?) prevents sunburn in someone with sensitive skin?
- lobocinza 5y agoI'm not a hiker but I do cycle and a few times I was exposed for hours to direct noon sunlight. The contrast is clear, exposed skin is red and irritated where the skin under the clothing is white and unaffected. Any kind of synthetic clothing has a greater amount of sunburn protection when compared to cotton but most of the specialized gear comes with additional UV50+ protection.
- germinalphrase 5y ago
- ineedasername 5y agoDifferent light wavelengths may penetrate a given material to different degrees. We'd need to know the relative differences in those rates between UV & blue spectrums in order to evaluate whether a typical t-shirt would negate the effects observed in this study.
- Sosh101 5y agoMaybe it's more about thermal insulation than energy storage.