
Originally Posted by
MuscleScience
Actually i did until recently, I started researching low carb diets and doing pwo, protein only. I read a couple of really good studies that looked at protein synthesis PWO with carbs + protein ingestion vs carb only or protein only or control. In both studies protein synthesis pwo was not significantly different in the protein+carbs vs the protein only group. I wish I could find the studies i am not sure were I put them. I think it was in ACSM's journal MSSE in the may or june edition. I can not remember I read so many papers throughout the week Its hard to remember were i got them all. I will see if I have them in my endnote file if you really want them.
Anyway what brought me to those papers is there is an effect called after burn where the body is in a fat burning mode to make up for the O2 debt and the effect of adrenaline post exercise. It has been know for sometime that for about 2 hours after exercise the metabolism is raised and a larger percentage of fat calories are being use to generate ATP for growth and repair and other energy needs. However as soon as insulin hits fat and muscle cells it virtually cancels the effects of adrenaline and causes a virtual shut down on fat burning. The reason for this is that insulin and adrenaline have an inhibitory effect on each other in the intracellular second messenger systems. (AC, PP-1, IP3 and probable some others I cant think of right now)