During short-term exercise (ex:weight-lifting), what is going on biochemical in

Question

During short-term exercise (ex:weight-lifting), what is going on biochemical in your body (the muscles, liver, heart, circulation, etc)?

I think that you begin with glucose going into glycolysis,TCA, and oxidative phosphorylation. When you use up the free glucose then the cori cycle will begin with lactate dehydrogenase.

I am confused on if this is the correct approach and where this is occurring in the liver/muscles/everywhere? And what else can I incorporate that is occurring biochemically in this scenario?

Explanation / Answer

Any type of exercise uses your muscles. Running, swimming, weightlifting -- any sport you can imagine -- uses different muscle groups to generate motion. In weightlifting, your muscles are working to move a weight. Exercise means muscle activity!

As you use your muscles, they begin to make demands on the rest of the body. In strenuous exercise, just about every system in your body either focuses its efforts on helping the muscles do their work, or it shuts down.

your heart beats faster during strenuous exercise so that it can pump more blood to the muscles, and your stomach shuts down during strenuous exercise so that it does not waste energy that the muscles can use.

Many metabolic activities will take place at higher pace at the liver to meet the demands of energy production.

Your muscles take in a source of energy and they use it to generate force. An electric motor uses electricity to supply its energy. Your muscles are biochemical motors, and they use a chemical called adenosine triphosphate (ATP) for their energy source. During the process of "burning" ATP, your muscles need three things:

­I­n order to continue exercising, your muscles must continuously make ATP. To make this happen, your body must supply oxygen to the muscles and eliminate the waste products and heat. The more strenuous the exercise, the greater the demands of working muscle. If these needs are not met, then exercise will cease -- that is, you become exhausted and you won't be able to keep going.

As the oxygen is consumed, during vigorous exercise, the rate of ATP production tremendously increase. This leads to the anearobic conditions in the body. The glycolysis will divert to the Cori cycle, in which lactic is produced.

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