Not from being upside down. I'll get a headache if I spend too long upside down, but I don't get dizzy from it.
I do get dizzy from spinning -- well, I'm fine while I am spinning. It's when I stop abruptly that I get very dizzy, as it's a mismatch of data from my eyes vs. my inner ear that will make me dizzy. As long as they agree, I'm fine! When they don't... blegh. (This is also the underlying reason that people get motion sickness -- their eyes and their ears end up disagreeing one way or another as to what is happening and that is very upsetting to our nervous systems.)
Hee! Yeah, I gather going completely upside down doesn't come up that much in rock climbing. Except possibly for that guy (Steve McClure, a search of my other journal tells me) who apparently just does bat hangs as a way to rest.
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I do get dizzy from spinning -- well, I'm fine while I am spinning. It's when I stop abruptly that I get very dizzy, as it's a mismatch of data from my eyes vs. my inner ear that will make me dizzy. As long as they agree, I'm fine! When they don't... blegh. (This is also the underlying reason that people get motion sickness -- their eyes and their ears end up disagreeing one way or another as to what is happening and that is very upsetting to our nervous systems.)
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I was curious. I've never done anything where I had to hang upside down. (grin)
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I mean, I can only do one for about 10 seconds before the pain is too much.