Originally Posted by roadbuzz
Huh? Aren't all components of the oxygen delivery system critical? Lung capacity, red blood cell count, blood volume, as well as heart stroke volume and capillarization are factors.
Yeah, there's a time-delay with aerobic capacity in relation to anaerobic workout. But that's primarily in recovery after the effort has ended (excess ATP is requried to synthesize PC). But in-the-monent, once you're exerting power beyond what aerobic glycolysis can provide, O2 is no longer a limitation, it's all anaerobic above that.