Originally posted by TJohn
The carbs will create an insulin spike which will help deliver the protien to your muscles. However, it will also slow the fat burning process. That's why you should only do it while bulking.
TJohn
Hey, just thought i'd add something here:
Anytime you eat something you create an insulin response. Carbs only cause a "spike" if they're high enough on the IS (the GI is also a semi-decent indicator of this too, albeit an inferior one), so an apple for instance, won't exert the same insulin response as say, dextrose.
Protein causes only a 30% rise in insulin compared to carbs. That is, any given amount of protein would cause approx. one third of the insulin response that the same given amount of carbs would.
Fat doesn't blunt insulin response like a lot of people think. In fact alone it causes neither a rise in insulin nor glucagon (although it does stimulate lipase release which can be good for oxidising body fat), but fat digestion takes longer than carbs or protein and so adding fat to a meal will slow the digestion and lessen the meal on the GI. Hence, a slowed, more stable insulin response.
(Insoluble)Fibre is is undigestable and slows digestion further, again, lessening the insulin response.
That is why, when cutting, a protein, fat and fibre meals = ideal.
Not to mention the fact that around 30% of protein's calories are lost in it's own digestion. It is quite thermogenic!
I realise this has pretty much no relevance to this thread, but a little extra knowledge is always good.