Uhhh, no. This is what I meant earlier by your misunderstandings of physiology. Again, I refer you to Costill or Astrand or any other physiology text.
Motor units are perfused with blood when they are activated by the nervous system. The limiter is cardiac output; perfusion of muscle must be balanced against systemic blood pressure. If you suddenly and maximally perfused all possible motor units, you'd be on the floor because of low blood pressure. So, in fact, the ultimate exercise limiter is cardiac output. If you could endlessly increase your cardiac output, your criticism might be understandable at least.
This point is demonstrable by testing oxygen uptake while exercising a small muscle mass. I'll try to find one of the papers if you need a citation...a physician friend of mine is writing a book and turned me onto it. Basically, O2 uptake (and local blood flow) is higher when you exercise a small muscle mass because the heart is able to perfuse that muscle more, because maintaining systemic bp is easier.
Finally, if 02 delivery was not the issue, why does EPO work? It doesn't increase heart function, but does in fact increase the amount of available 02 per unit of blood. And it certainly does not change cellular factors.
Brodsky
Motor units are perfused with blood when they are activated by the nervous system. The limiter is cardiac output; perfusion of muscle must be balanced against systemic blood pressure. If you suddenly and maximally perfused all possible motor units, you'd be on the floor because of low blood pressure. So, in fact, the ultimate exercise limiter is cardiac output. If you could endlessly increase your cardiac output, your criticism might be understandable at least.
This point is demonstrable by testing oxygen uptake while exercising a small muscle mass. I'll try to find one of the papers if you need a citation...a physician friend of mine is writing a book and turned me onto it. Basically, O2 uptake (and local blood flow) is higher when you exercise a small muscle mass because the heart is able to perfuse that muscle more, because maintaining systemic bp is easier.
Finally, if 02 delivery was not the issue, why does EPO work? It doesn't increase heart function, but does in fact increase the amount of available 02 per unit of blood. And it certainly does not change cellular factors.
Brodsky