Another amazing Searen video

[N2theBlue]

Bends is about bottom time and nitrogen uptake and not assent rates as breath holders have only the amount of air that they bring from the surface with them, within there lungs, there nitrogen uptake is not as great as a scuba diver at the same depth, but technically yes they could bend, if they were silly enough to make multiple dives within one day with no "surface time" to out gas the extra nitrogen within the blood stream.
Breath-hold or free diving has other and more frightening problems should you over stay your welcome on the bottom!! It's called shallow water blackout, this is to do with Co2 not nitrogen. Because of the big pressure change in the top 30 feet, you can blackout underwater if the Co2 content within your blood is high, this is not a good idea as the nervous system that you do not think about (parasympathetic) then tells the brain to breath and well...........
Shallow water blackout is the biggest killer of free divers, never dive alone use the one up one down system so your buddy is watching you all the time.

Exactly. They teach you all this stuff in the course, including the proper breathing techniques for before and after each dive, and how long you have to take between dives. Anybody interested in doing it should definitely take the course.

[bigfishhooker]

Another sweet video by SeaRen