I used to play Capoeira. Often when being in the Roda for just a couple of minutes it felt like it is so exhausting like if you run for an hour (I guess so. Can't say for real because i never run ;-) ).
I wondered why its like that, and I thought part of the reason is the regular change between being upside down and normal. Having the head poiting to the floor, and up again. Something about circulation.
However all of those ideas where very vague.
Now doing bridge walks on the wall I feel something similar. And also the people in the video seem to breath heavily.
So maybe it has something to do with the upside down for real.
I wondered if you guys have any infos on this.
Thanks,
Michael