Following a workout, muscle glycogen stores are depleted, and many muscle
proteins are also broken down, leaving us in a deficit state in respect to both of these crucial nutrients.
As more and more glycogen and glucose is burned up for energy, blood glucose
levels begin to drop-off, which in turn cause insulin levels to drop drastically.
That is a very vital step to grasp because of the properties insulin has in relation to protein synthesis and anabolic hormone production.
These drops give rise to the catabolic hormone Cortisol.