As blood sugar levels drop, insulin levels drop and the pancreas produces the hormone glucagon and nutrients stored in the fat cells are released to the blood and used for energy. The management of this blood sugar rise and drop is important. If blood sugar levels go to high insulin feeds the muscle cells and deposits excess into fat cells. If insulin levels go too low, the muscle cells are being under fed. A slow rise in blood sugar provides good nutrition to the muscles and a slow drop allows glucagon to take from the fat cells. Timing your exercise to this blood sugar decline allows the muscles to receive from the fat cells more effectively. It is important to never exercise without having at least one meal left in your day so that muscles can recuperate from exercise.
Insulin is highly anabolic, but too much can work against you. That is why you have to find the right balance.
Originally Posted by coolZero
This may work for you. If you do cardio as apposed to a fat burning exercise. Your blood sugar drops too fast and your Insulin kicks in, effectively stopping your metabolism. You will not burn fat when this takes place but burn muscle
^^ Can you explain the biochemistry behind the insulin statement? Do you know the role that insulin plays?
P.S.
Stay in your target heart range