Originally Posted by Enthalpic
Well we do know that people with diets high in simple carbohydrates tend to suffer from elevated triglycerides. However, we don’t find that athletes with high triglycerides perform better or recover faster. So does the liver release more fat when carbohydrates are ingested during exercise, maybe. Do those fats increase any performance measure, probably not. The effect could just be a liver defense mechanism to prevent fatty liver when eating at rest; like when calories-in is greater than calories-out, dump fat into bloodstream. The fat can just stay in the blood while the liver plays catch-up, all while the adipose tissue tries to buffer these swings.
Could the increase in triglycerides in the consumption of simple carbs be due to the insulin spike causing an increased absorption of glucose resulting in rebound hypoglycemia, which in turn leads the the release of diabetogenic hormones causing an increase in serum levels of triglycerides? As a result it may not be a defense mechanism to reduce the chance of liver morbidity but merely a response to low glucose levels.