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Thread: Hanging upside down

  1. #1 Hanging upside down 
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    assuming food/water supply etc is not an issue, how long can a human survive being hung upside down.


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  3. #2  
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    ive always wondered this...it does get painful after a while though.


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  4. #3  
    Forum Senior anand_kapadia's Avatar
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    Well try once. We all want to know
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  5. #4  
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    A question for ex-prisioners methinks!
    Chickens in a slaughterhouse can only manage it for about 20 seconds.

    I think you would get used it, I see no limit. Zero gravity is a very similar experience.
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  6. #5  
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    Quote Originally Posted by Megabrain
    I think you would get used it, I see no limit. Zero gravity is a very similar experience.
    really? Doesn't gravity kinda help the blood get down to our feet? So the heart doesn't have to pump as hard? But if you're upside down gravity will pull the blood to your head and you will have a lot of trouble getting the blood to your feet. I would think the only way you could "get used to it" is through evolution but I don't think you would survive long enough to reproduce so I don't think we will ever live upside down! :wink:
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  7. #6  
    Forum Ph.D. Nevyn's Avatar
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    not really, Divers can get used to preassure, they go through training to deep dive without air tanks, the deepest someone has gone without an air tank of subarine is 195 meters, i watched a documentary about it, the lungs get squashed to the size of a tangerine under the preassure, then the plasma comes out of the cells to stop the lungs from shrinking further, when they come back to the surface, the placma goes back into the cells
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  8. #7  
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    diving has the same effect as hanging upside down but I think it's much milder
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  9. #8  
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    I don't know but i would imagine that your legs would eventually wast away and it would be a lot of strain for your heart, but other then that your body (i imagine) would adapted.
    Eat Dolphin, save the Tuna!!!!
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  10. #9  
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    Where I work we sell a piece of workout equiptment that hangs you upside down from your feet. The manual says for no longer than 15 minutes per day or else serious health risks could result.

    I don't know what they would be though. Although I can't last more than about 1 or 2 minutes upside down.
    It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong. --- Isaac Asimov
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  11. #10  
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    I heard somewhere that hanging upside down will kill u due to the blood being pumped to ur head at high pressure. though i dunno if that's true but i'm pretty sure that hanging upside down will probably make u pass out eventually.
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  12. #11  
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    Quote Originally Posted by Megabrain
    I think you would get used it, I see no limit. Zero gravity is a very similar experience.
    Yea, that's what I was gonna say.
    Do not try and bend the spoon. That's impossible. Instead... only realize the truth. There is no spoon. Then you'll see that it is not the spoon that bends, it is only yourself. -Spoon Boy
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  13. #12  
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    You got two choices as they say!
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  14. #13  
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    Quote Originally Posted by DaBOB
    Quote Originally Posted by Megabrain
    I think you would get used it, I see no limit. Zero gravity is a very similar experience.
    Yea, that's what I was gonna say.
    hehe, zero-G is definitely different, the earth has a gravity of 9.8G's, hang upside down and suddenly you've got 9.8G's of pull, but on the wrong side of your body(which has evolved for millions of years, used to how it's supposed to be)
    zero-G just makes you weak, your heart needs to work much less to get the blood where it needs to go(why do you think astronauts need to train for months to get back to their previous strength after they come back from space...)

    i'd think you'll die after a few days upside-down or so...

    as stated before, a ,lot less blood to your legs, but alot more to your head...don't think anyone can live like that for a long time, strain on the vains in your head would become too much eventually(how bout some cerebral hemorrhages...)
    grtz.
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  15. #14  
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    Yeah that's sort of right.

    Firstly, gravity is not 9.8G's. It's acceleration is 9.8ms-2!
    Your brain's blood vessels can withstand forces of up to 3g, whereas the blood vessels in your foot can experience around 9g.

    When you hang vertically upside down. The pressure (=density x gravity x heigth) greatly increases within your blood vessels as there is now a column of blood originating in your legs passing vertically down into your cerebral vasculature where it is then under high pressure due to the heigth above it.
    Your veins begin to dilate & fill with blood and if there are any weaknesses, the vessels may burst and cause your haemorrhage!

    ok, I still dont know how long this would take but I dont think you would have to wait days. You may die of a stroke from stasis of the blood (take a few hours)
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  16. #15  
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    Quote Originally Posted by Robbie
    Yeah that's sort of right.

    Firstly, gravity is not 9.8G's. It's acceleration is 9.8ms-2!
    Your brain's blood vessels can withstand forces of up to 3g, whereas the blood vessels in your foot can experience around 9g.
    , ahh, you're right:P, wasn't thinking properly there :P of course 9.8 m/s^2 is 1G :P
    grtz.
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  17. #16  
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    OK what I said was crap, should have thought about it a bit more than I did, however we spend 1/3 of our lives laying down, this must be half way to up side down in terms pressure.
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  18. #17  
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    Hmm, Perhaps through training, could you strengthen your body to withstand the effects of being upside down? Shaolin monks train in various techniques upside down for large periods of time.

    Would the blood vessels in your head become stronger if you were to be upside down at increasing periods of time?
    Like how people wieght train, they graduately increase the weight that they lift to get stronger?

    Is their any evidence to prove that being upside down helps your immune system or any other benifits?

    I will quote some websites but i would like more of an professional opinion.
    A)
    "The baro-receptors (pressure receptors) of your cardiovascular system are located in the blood vessels on each side of your neck. When you invert, the pressure measured there increases. The increased pressure triggers a signal to the heart to stop working so hard!"

    B)
    "the drainage port between the lymphatic system and the cardiovascular system (in this instance, the veins) is also located near the neck. When you invert for a period of time (maybe 6 or 8 minutes) those ports open up and the easily congested lymph system drains. That benefits your immune system and helps you fight disease."

    any truth to these?
    To think outside the box
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