Yes
@ringi, I agree that glycolysis occurs during aerobic exercise and as the glycogen store is depleted, it's possible again for the store to be replenished if the glucose can get into the muscles. But the problem is the insulin resistance. Just because the glycogen store is depleted doesn't necessarily mean that it becomes easier for the glucose to enter the muscles, nor that it be stored again as glycogen. With insulin resistance, it's hard for the glucose to be transported into muscle cells regardless of the amount of glycogen or glucose already in those tissues. Although resistance training and endurance work improves the oxidative capacity of the muscles, the problem for T2 diabetics is that glycogen synthesis in the muscles is greatly reduced. Exercise has never been enough to restore its functionality but it has always been an important part of the clinical recommendations. I'm sure we've all heard the recommendation from GPs.
Taylor has looked at the question differently by studying the triglyceride metabolism. Glycogen is one store of energy (long chains of glucose molecules) but the other major store is triglycerides (from glycerol+fatty acids) and that's what has impaired liver and pancreas function. Taylor argues that the effect of triglycerides + insulin excess + excess energy intake produces two vicious cycles, one in the liver and the other in the pancreas and that's where the insulin resistance comes from. The liver becomes insulin insensitive, and the pancreas loses beta-cell functionality and can't make enough insulin. Those two cycles reinforce each other and cause uncontrolled diabetes. In the processes identified by Taylor, glycogen doesn't play any significant role. I think that's one of the revolutionary aspects of Taylor's explanation, that it's all about the triglycerides rather than glucose-glycogen. It's quite a shift in perspective for clinicians. Given Taylor's research, I've had to revise a lot of what I used to think was the case about glucose and lipid metabolism but the evidence is, to my mind, very convincing. I haven't come across anyone with a credible challenge.
I suppose though, although the biochemistry is interesting, the bottom line is what it means for us and what we need to do. After years and years of trying exercise, low carb diets, various medications, etc, and seeing my condition gradually worsen, I think the ND is by far the most optimistic and plausible way to tackle the condition. I try to analyse it all as best I can, but regardless of the explanations, I find the evidence from actual patients the most convincing.