Daisy_Girl said:
This is why people take in tons of carbs post-workout - to shuttle them into the muscles for recovery without them being stored as fat (theoretically)?
Yes, you can burn off a some carbs with weight training, and you can restore those same carbs with post workout carbs. However you can't store excess calories as fat if you aren't eating excess calories. I think this is where too many people get confused. It's really excess calories stored as (visceral) fat that cause insulin resistance and not the other way around. Instead of worrying so much about the number of carbs or GI of foods, people would be better off is they just ensured they don't eat like pigs all the time.
Daisy_Girl said:
A more insulin resistant person might have higher cholesterol levels due to the fact that the fexcess is circulating more (because it cannot be utilized) because the insulin cannot shuttle it into muscles/brain? Is this mostly a genetic thing? Are we genentically programmed to be more "insulin resistant" or "insulin sensitive"?
Excess calories, whether from carbs or fat, have to go somewhere. If they can't get stored in muscles or subcutaneous adipose tissue (due to insulin resistance or because you haven't used your muscles) then they get stored in visceral fat. This visceral fat sets up a viscious cycle where it increases circulating fats, which increases insulin resistance, which causes more fat to be stored in visceral fat. Also, once insulin resistance becomes pathological, your brain senses a lack of glucose because the glucose can't get into the cells (even though there's lots of glucose in the blood). This signals the liver to produce more glucose, the pancreas to produce more insulin, so now you have high blood glucose, insulin and lots of fats floating around. Not good.
Some folks are more genetically prone to this than others, but I stress again that this is mainly when the environment (in other words excess calories) interacts with those genes. if you remove the excess calories then you remove the root cause of the problem.
Daisy_Girl said:
Let me see if I understand. In a non-diabetic person, when you eat, your body releases insulin. The amount of insulin released depends on the food eaten.....high GI carb will release more, low GI carb will release less. The insulin helps utilize the carbs in your muscles and brain. The excess (carbs? insulin?) will go towards fat-making.
Insulin resistance is when insulin is not working efficiently. The insulin is present, but target tissues are less sensitive to insulin. From Harper's Biochemistry, "In conditions in which plasma insulin levels are high, e.g. obesity, the number of insulin receptors is decreased and target tissues become less sensitive to insulin. This down-regulation results from the loss of receptors by internalization, the process whereby insulin-receptor complexes enter the cell. Down-regulation explains part of the insulin resistance in obesity and type 2 diabetes mellitus." So part of insulin resistance is the result of high insulin levels leading to reduced numbers of insulin receptors. It's not just the carbs that cause the problem. More like the other way around. High insulin due to high fat causes a lot of the problems.
The key point is higher levels of insulin create a vicious circle of less sensitive insulin due to down-regulation of insulin receptors, resulting in even higher insulin levels and increased insulin insensitivity. Diabetics mainly focus on blood sugar levels, but reducing insulin levels is vital. Losing weight, exercise, eating low glycemic foods, eating small meals, supplements, and other methods can reduce insulin levels .
Very complex.[/QUOTE]