The body is constantly fuelled by glucose. Glucose is an essential source of energy for the brain. It is also fundamental energy source for working muscles. There are three primary source of blood glucose as mentioned by Champe and colleagues (2007), these are diet, degradation of glycogen and gluconeogenesis. The food intake gives a random source of glucose. On the other hand, gluconeogenesis provides a continuing supply of glucose (Champe etal 2007). However, the process cannot keep up immediately if the body is losing so much glucose.
Thus, the body store mobilizable glucose called ‘glycogen that is quickly released in the liver and kidneys (Champe et al. 2007). ’ Glycogen Glycogen in muscle tissues is primarily responsible for providing energy source for muscles during exercise or intense work. Glycogen is commonly stored in the liver and the skeletal muscles (Houston 2006). It provides the muscles a fuel reserve during muscle contraction that results to the synthesis of adenosine triphosphate (ATP). Glycogen is primarily made up of polymerized glucose (as shown below).