Why does being out in the sun make you tired?

[GoingUp]

Anyone else notice that? When you spend a day out in the sun, you get exhausted? I just sat in the sun for a couple hours yesterday at a ballgame and by the end of the day I was pooped, even though I didn't do much outside except sit at the game.

Opinions?

 

[NoShangriLa]

heat stroke?

 

[RichUK]

Over weight?

 

[MmmSkyscraper]

/me shakes fist at Sol :|

 

[GoingUp]

Originally posted by: RichUK
Over weight?

I'm 6'5" and 185. I hardly doubt I'm overweight. I also work out 4-5 times per week.

 

[jdoggg12]

As an athlete, our coaches always told us to stay out of the sun unless you're getting ready for your event ( 400m 0:49, 800m 1:51).

If we spent more than a couple ours in the sun before our event, we'd usually have slower times.

 

[ch33zw1z]

You burn more energy staying cool? good question, never could figure it out either..

 

[Howard]

Dehydration?

 

[b0mbrman]

Originally posted by: Howard
Dehydration?

That would be my guess

 

[SViper]

http://en.wikipedia.org/wiki/Hyperthermia

Don't know if that really answers your question, but it explains it a little.

 

[jdoggg12]

IIRC the phys trainers told me that it's b/c your body expends energy to stay cool, and that effort is multiplied when you're in the sun. So you stay in the shade to avoid burning that energy.

 

[GoingUp]

Originally posted by: jdoggg12
IIRC the phys trainers told me that it's b/c your body expends energy to stay cool, and that effort is multiplied when you're in the sun. So you stay in the shade to avoid burning that energy.

that makes sense

 

[bignateyk]

It was our spring game yesterday, and with it comes a massive tailgate. I was out in the sun drinking beer from 7:30am till 6pm. I came home,sobered up and drank lots of water for an hour, and then slept from 7pm till 11am the next day. After sleeping for 16 hours, I got up, made some food, then took a 2 hour nap.

Id say this was mostly a result of so much sun exposure, because I wasnt hung over at all, and when I went to sleep I was sober and I drank alot of water.

 

[PokerGuy]

I've noticed this as well, and I'm not sure what causes it. Sit out in the sun for a while and you end up lethargic and tired until you take a nap or sleep. The energy-used-to-keep-cool explanation sounds plausible, but I haven't seen/read anything "official".

 

[bobsmith1492]

My theory:

Given: 1. The sun's radiation causes thymine dymers in your skin cells at a massive rate.
2. Your body has to repair all of this damage and it also begins producing melanin to help prevent further damage.

So, your body has to use a ton of energy to repair itself and retool for sunny weather. Skin cells also have to regrow to replace ones killed by the sun, and your skin is your body's largest organ. Use of all this energy makes you tired. Then there's dehydration, of course.

 

[Linux23]

"THE SUN'S HOT" - Ollie Williams

 

[chr6]

ive noticed this also, interesting thread. i usually drive up to visit my parents on the weekend, and leave at night (1am) to avoid traffic, and i'm fine for the 1.5 hr drive.

once or twice i went during the day (2-3pm) and the afternoon sun really just made me feel tired and sleepy, and relaxed.

 

[TecHNooB]

If your name was Jor' El you wouldn't be having this problem.