Bad Wigins wrote:
ThisAerobic respiration was doing the trick for about 300 meters but greedy muscles demanded more energy than the available oxygen could process, so they turned to anaerobic respiration to burn fuel. Of course, the by-product of anaerobic respiration is lactic acid, a substance which, in excess, is toxic.
is false, completely backwards even. The first 300 is not aerobic. Everyone who runs 800 knows this, or damn well should.
You start out almost entirely anaerobic, and as pH drops, you switch increasingly to aerobic. Acidosis hits late because it takes a while for pH to drop to a crippling level, and because the increasing aerobic respiration acts as a buffer against it. The same hemoglobin that delivers more oxygen at low pH also binds to cations and removes them from the muscles.
That is correct.
I don't know what kind of exercise physiologist they interviewed if he said something like that or agrees with that. They probably just grabbed a random high school coach.