[quote]Josh Rider wrote:
Hormones like insulin?
Beyond that, it’s the simple chemistry of how fat is digested in the body. Fat is 9 calories/gram where carbs and protein are only 4. Fat is simply an inefficient refueling choice given the circumstances of the body immediately post workout. It requires too much energy to be utilized. That’s why free form amino acids and predigested proteins are the shit for post workout nutrition, they require less energy to digest. [/quote]
Fat doesn’t require “a huge amount of energy to be utilized.” In fact, the efficiency of digestion for fat is higher than that of carbohydrates and protein by a reasonable amount. You are mixing concepts. Fat takes the longest to digest, slows gastric emptying (which as a consequence will “blunt” the insulin response in a sense and will alter the speed of glucose/amino acid digestion), and may not have any specific acute benefits in the post-workout period. However, in the “big picture,” including fat in your post-workout meal if you got the macro-variables under control probably won’t make a difference.
I learned in school about the gastric emptying being slowed down and the fat taking longer to digest. You’ve both made valid points there, and from that I always try to minimize my fat intake immediately post workout. Instead of steak, I’ll have chicken + carbs when I get home about an hour after my workout. Not necessarily because I wait on purpose, its about how long the commute takes + preparing the food.