What are back bends?
Backbends are normally just a code name for "The Bridge" When doing a backbend, you either lie down and bring up your stomach to where it looks like a bridge, Gymnists are able to do it standing, I'm no gymnist, but I can stand and bend my body backwards and then catch myself before I hit the ground. Hope this helps, I'm 16 and is still getting used to these.
Spending time in a barometric chamber (in which the pressure is raised above atmospheric) causes nitrogen bubbles in the blood stream (the cause of the bends) to go back into solution and gives the nitrogen the opportunity to exit the body via the lungs so that it won't come back out of solution when the pressure is lowered.
the explanation is that the bends are caused by nitrogen in the blood stream and the block up the blood way and causepain. to get rid of the bends you need to see a doctor IMMEDIATELY. TO PREVENT THE BENDS rise to the surface of the water every 15 minuets. the air will then clear you blood passage. Nitrogen in the bloodstream causes bends, which leads to blocking of the bloodstream causing pain