And so we're not going to be able to actually spring for very long for this exact reason? Because Glycolysis stops and our skeletal muscle tissue will not be able to get the ATP molecules that they actually need to continue the process of running. Now, this is especially important for those skeleton muscle cells which are found far away from the blood vessels. Why? Well, because the blood vessels are the conduits that bring those glucose molecules to the cells and these cells essentially uptake the glucose molecules by using these glucose transporters and the glucose is then broken down into ATP and Pyruvate via Glycolysis. So we see that lactic acid fermentation will be especially active in those muscle cells that lie far away from blood vessels.