Muscles need energy. This energy comes from food. The food is stored as glycogen in muscles and fat. Sometimes, when there is not much other choice and due to factors such as diet and exercise, the body will burn protein. The fuel for muscle is adenosine triphosphate (ATP). In aerobic respiration, the most common way in which we obtain ATP, the oxygen that we breathe reacts with atoms and molecules to produce ATP. The main fuel for this is glucose, or the most common sugar molecule. Glycogen is reduced to glucose. Here is the reaction:
(1) C6H12O6 + 6 O2 + 6 H2O + 38 ADP +38 P > 6 CO2 + 12 H2O + 38 ATP + 420
All of the C-H bonds and C-C bonds, which are high in evergy, have been lost and replaced by bonds having minimal energy. These minimal energy bonds - H-O and C-O - have been spared or created. Energy is liberated, along with carbon dioxide, through the oxidation of molecules containing carbon. Note that water is needed for this reaction, so drink plenty of it! (See the water blog.)
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Some information for this blog was obtained from http://www.cbu.edu/~seisen/AerobicRespiration.htm
Accessed on November 22, 2005
Disclaimer: Information on this blog is posted for information purposes, not as a substitute for professional medical advice.