When the body is placed under stress (beginning of workout) cortisol is released by the adrenal glands. It is a catabolic (tissue break down) hormone and it has a number of functions to maintain energy supply during the breakdown of macro-nutrients:
- It enters the liver to aid glycogenolysis
- It enters adipose tissue to release free fatty acids (FFA’s)
- It activates lipase(an enzyme that processes dietary fats/lipids)
- It enters the muscles to stimulate the release of amino acids
(as you can see its a very important hormone to know about within progression)
Make progress, not excuses.