Your blood is after it passed the lungs saturated with 100% of oxygen. And you can't improve it to 101%
EPO can improve it, cant it?
Joking of course.
All I'm saying is there are breathing techniques and exercises you can do to strenghthen your lungs and improve performance .. I've got a book somewhere about how some pro's use them, I can dig it up. Something about the rythem and depth of breathing, especially when climbing. I don't think anyone can expand their lung capacity .. if that's what you're talking about, I agree.
No, that was not what I tried to explain. I tried to explain that bigger, better lungs do not increase your cycling performance. But I did not explain it very good. I will do it again:
Increasing cycling performace is increasing your aerobic system. The bottle neck of the aerobic system are not your lungs. It is the uptake of oxygen in the muscles. So increasing your lungs does not increase your cycling performance. Normal lungs (healthy lungs of an healthy person) give oxygen to your blood. They give it till your blood has 100% of oxygen.
When you are cycling very fast. For example at your vo2max intensity. Your muscles have reached their maximum oxygen uptake. They can't consume any more of o2 (oxygen). When you go faster you are still using the same amount of oxygen. It's your vo2max. Maximum Oxygen Uptake.
But at that level your lungs can still give your blood 100% saturation with oxygen. Your muscle still get enough oxygen deliverd by blood only they can't consume it...
That's a fact. Just like eating pancakes. When we only get 1 pancake /hour we can consume them all. My maximum eating speed is for example 5 pancakes / hour. When I get 5 pancakes / hour. I eat 5 pancakes / hour. But when I get 10 pancakes / hour. I still only eat 5 pancakes / hour.
Then my eating speed is the bottle neck, not the kitchen.
For the lungs it's a little bit different because they just try to keep the blood o2 saturation at 100%. It comes in your muscles with 100%. Your muscles consume some o2 and the oxygen drops to 50%. When it comes back in the lungs it's saturated with 100% again.
It's difficult for me to explain it in english. But I hope everybody can understand what I am saying.