Hello,

I've been swimming since I read Win Wenger's and Alan Poe's book, The Einstein Factor. One thing is for sure, it works, not that I've felt anything, but chess player Kasparov for example, runs 100m races to accomplish the same. And I doubt that he holds breath at all.

For what I read in the book, the increase of CO2 in the blood is what produces the enhance, you don't have to hold your breath, just swim. But maybe I'm wrong of course.

Let's see if anyone else can share his/her knowledge.

Bye!