Freediving.......

[/pine]

One of the practices these guys use is saturating their blood with O2...by hyperventilating prior to a dive...

 

[RobertBrown]

He wasn't 600 feet underwater. He was going for about 1/3 of that at 236'.

Correct! but the world record is 214 meters, 656 feet.
I can't imagine what that's like. Very cold and very dark.

 

[Dr_Zinj]

He should have stopped when he lost his sense of taste. That was the one warning that he took permanent nerve damage. An acquaintance of mine washed out of SEALs training from a ruptured ear drum. Once that happens, that's all she wrote; you're at risk for further and graver injuries with every deep dive.

 

[MossRoad]

Correct! but the world record is 214 meters, 656 feet.
I can't imagine what that's like. Very cold and very dark.

Yep. That's with fins and a weight sled. Incredible what the human body can do and how far some folks will push it trying. I don't like to walk to the fridge to get milk and cookies without a night light! :cool2:

 

[jerrybob]

One of the practices these guys use is saturating their blood with O2...by hyperventilating prior to a dive...

Lance Armstrong got in a little trouble for doing that....didn't he??

 

[MossRoad]

Uh, no.

 

[jerrybob]

Uh, no.

You sure? Isn't this kinda like blood doping without the injection??

Blood doping is defined as the use of illicit products (i.e. erythropoietin (EPO), darbepoetin-alfa, hypoxia-inducible factor (HIF) stabilizers) and methods (i.e. increase aerobic capacity by maximizing the uptake of O2) in order to enhance the O2 transport of the body to the muscles.[2]
The body undergoes aerobic respiration in order to provide sufficient delivery of O2 to the exercising skeletal muscles and the main determining factors is shown in figure 1. The rate maximum O2 uptake (O2max) depends on cardiac output, O2 extraction and hemoglobin mass. The cardiac output of an athlete is difficult to manipulate during a competitions and the distributions of cardiac output is at the maximum rate (i.e. 80%) during competitions. In addition, the O2 extraction is approximately 90% at maximal exercise.[2] Therefore, the only method to enhance the physical performance left to increase the O2 content in the artery is by enhancing the hemoglobin mass. In other words, hemoglobin concentration and blood volume contributes to hemoglobin mass

 

[aczlan]

Lance Armstrong got in a little trouble for doing that....didn't he??

For hyperventilating?

Aaron Z

 

[MossRoad]

Yeah I'm pretty sure breathing is still allowed in athletic competitions. :laughing:

 

[aczlan]

Yeah I'm pretty sure breathing is still allowed in athletic competitions. :laughing:

I don't recommend doing it underwater unless you have a snorkel or supplied air, but otherwise, I am pretty sure that it is.

Aaron Z