In preparation, Blaine has been training in the Cayman Islands – and he's recorded two video blogs in which he describes his preparation. In one clip, the magician shows details of his training regimen, including the nights he's slept in a special hypoxic tent, which is filled with lower than normal levels of oxygen.
Says Blaine: "I've been sleeping here for a month – and I was just in Cayman where I've been training on holding my breath. And I've been getting pretty good, so my times have been getting much better."
In another clip he details his training free diving in the ocean where he holds his breath – and encounters sea life.