Insulin is the anabolic hormone and Glucagon is the catabolic hormone. The reason you want to eat fast acting carbs and protein after you workout is because the carbs will cause insulin to increase, this then leads to a greater absorption of protein. The protein is then delivered to your muscles for growth and repair. (I’m assuming thats what you meant by “reload” glycogen.
When you work out the body uses up the glucose for energy and when you run out of glucose the body goes to the glycogen reserves of the muscle and liver. When liver glycogen runs out the hormone glucagon is released. At this point your body is essentially in a catabolic state. Glucagon is released when your body senses really low levels of glucose in the blood. Glucogenesis then takes place and the body pretty much starts breaking down fats and protein to use as energy. If you continue working out then it’s pretty much protein being broken down because the body cannot breakdown fats during high intensity training.
Sooo… when you’re done training you want to supply the body with food as soon as possible. Preferable carbs/glucose because that’s the bodys preferred source of energy, and it increases insulin. It just takes too long for fats to be converted and during that time your body is eating up the protein as a fuel source so no growth and repair can occur. Thats why carbs and proteins after training is better than fats and protein.
Hope this helps, feel free to ask if you need anything elaborated.
[Slaps his head] Doh!
Yes, of course, didn’t think of the insulin response.
Thank you, just what I was looking for. Perfect!