Christian Harris2 said:Look. Post-workout protein—specifically whey—is non-negotiable. The reason you pair whey with carbohydrates (specifically glucose) is simple: they spike insulin levels. Insulin is crucial for shuttling amino acids (whey, creatine, L-glutamine, BCAAs—all just amino acids) directly into the muscle tissue to trigger repair and growth while preventing breakdown. I emphasize glucose because it’s the most efficient way to drive that insulin response.
Lately, though, there have been some different theories floating around.
Whey itself triggers an insulin response. Some studies even suggest oats drive insulin quite high—the insulin index doesn't always align with the glycemic index. Essentially, the body pumps out plenty of insulin in response to oats to clear blood glucose, which is why they show a low GI.
In principle, it hardly matters which carb you grab after training. Fruit, sucrose, glucose... it's all pretty much the same.
If you want to dive into the weeds on this, check these out:
http://www.alanaragon.com/elements-c...mic-index.html
http://www.bodyrecomposition.com/mus...-recovery.html