Interesting BUT...
This is very interesting, but let's not go off the deep end yet.
We've also been told that Lactic Acid causes the burn we feel when pushing through high reps. But in the first paragraph of the article, the BURN is listed as one of the things that were incorrect -
"Everyone who has even thought about exercising has heard the warnings about lactic acid. It builds up in your muscles. It is what makes your muscles burn. Its buildup is what makes your muscles tire and give out."
Well, if that's true, then what does cause the burn.
Next:
"As for the idea that lactic acid causes muscle soreness, Dr. Gladden said, that never made sense.
"Lactic acid will be gone from your muscles within an hour of exercise," he said. "You get sore one to three days later. The time frame is not consistent, and the mechanisms have not been found.""
I thought the mechanism that was substantiated as causing DOMS (delayed onset muscle soreness) was microscopic tears in actin and myosin??? I've read this many times - but he hasn't?
Next:
"Mitochondria even have a special transporter protein to move the substance into them, Dr. Brooks found. Intense training makes a difference, he said, because it can make double the mitochondrial mass. "
Does INTENSITY mean more weight or more reps?
And there's some seemingly opposing information here. First the answer is that the intensity needed to increase mitochondria is ENDURANCE exercise:
"Through trial and error, coaches learned that athletic performance improved when athletes worked on endurance, running longer and longer distances, for example. "
But then the article makes the case for BRIEF BOUTS of INTENSE EXERCISE as increasing mitochondira:
"Just before a race, coaches often tell athletes to train very hard in brief spurts.
That extra stress increases the mitochondria mass even more, Dr. Brooks said, and is the reason for improved performance."
That's closer to anaerobic rather than aerobic training.
Here's another article that says feeling the burn is a BAD thing, and that you need to bulk up your mitochondria. It also goes into a little more detail into lactic acid metabolism:
http://www.berkeley.edu/news/media/releases/2006/04/19_lactate.shtml
Here's a simple excerpt:
"But Brooks in the 1980s and '90s showed that in living, breathing animals, the lactate moves out of muscle cells into the blood and travels to various organs, including the liver, where it is burned with oxygen to make
ATP.
The heart even prefers lactate as a fuel, Brooks found."
Unreal stuff ... it's sort of like first being told tha chocolate, whole eggs and too fat from any source are bad for you, when in fact they're all pretty damned healthy for you.
Thanks for the heads up on this Phil.