Blood and Excerise Type II muscle fibers oxidize lactate at a very fast rates. When muscle contraction produces a significant amount of lactate, it is then released into the central circulation of the blood, and within seconds it is made available to that muscle for energy. Therefore, 75% of the lactate produced from high intensity exercise is made available for energy production in type II muscle fibers. The remaining 25% of lactic acid is used for energy in the heart, the make up of liver glycogen, and the supply of energy to inactive muscles. A good example of this would be a runner who is exceeding his or her planned race pace in a 10k. The excess lactic acid accumulated in the contracting muscle from insufficient oxygen is then made available to inactive muscles (e.g., the arms) from the central circulation of blood. The remaining lactic acid that is not directly oxidized for ....

Number Of Pages: 5

Number Of Words: 1280

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