1-27 Energy Systems

1-27 Energy Systems - KIN 310 Energy Systems...

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KIN 310 Energy Systems Where do we get energy for exercise? Anaerobic metabolism Aerobic metabolism Cross-over Concept What causes fatigue? Interaction of energy systems Energy The capacity or ability to do  work Can be: chemical,  mechanical, heat, light, electrical or nuclear Human movement 1. Converting  food (stored energy) to chemical energy Human movement 2. Transforming chemical energy into  mechanical energy The biological energy cycle Energy from the sun is used by plants to build food, giving off oxygen  What’s food got to do with it? Food = potential energy! Breakdown of food is used to manufacture adenosine triphosphate ( ATP ) .  The energy released by the breakdown of ATP allows the cell to perform its work. Adenosine triphosphate ATP Adenosine triphosphate ATP Η  breakdown of ATP   release of energy ATP = “high energy molecule” = remove a  phosphate, transfer energy  adp + p + energy   ATP Where does ATP Come from? 1.  Very limited supply of ATP stored in   muscle cells 2.  Breakdown of phosphocreatine 3.  Food (cho, fat, protein) is broken down and the energy is used to manufacture ATP. How does your body produce ATP? Phosphagen system ATP-PC system Anaerobic respiration lactic acid system Aerobic respiration Oxidative  systems 1
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KIN 310 Energy Systems Anaerobic metabolism ATP production through chemical reactions that require  NO oxygen  ATP-PC system  Phosphocreatine (PC, CP) = chemical Compound High energy phosphagen  2.  Stored in muscle cell ATP-PC system  When does the ATP- PC system predominate? 3 - 5      and up to  10-15 seconds of “all out” exercise What activites use the PC system?   powerful quick starts of sprinters, football players, high jumpers, etc. How much phospho-creatine can you store? It depends on…. . Your size Your  diet Your muscle mass How you train There is a limit! Running on empty?
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This note was uploaded on 11/13/2011 for the course KIN 316 taught by Professor Smith during the Spring '11 term at University of Texas.

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1-27 Energy Systems - KIN 310 Energy Systems...

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