Lactic Acid System

Lactic Acid System

1. It is an anaerobic reaction and so does not require any oxygen

2. Uses the food fuel Glycogen

   • Glycogen is stored in the muscle cells and also in the liver

3. Used for short to medium bursts of intense exercise

4. The site of the reaction is in the sarcoplasm of the muscle cells

5. This energy system is the second one to be used during exercise and starts 10 seconds after beginning exercise and will last up to 2-3 minutes

6. The reaction is controlled by three different enzymes

   • 1.GPP (Glycogen ---> Glucose)
     • 2.PFK (Glucose ---> Pyruvic Acid)
       • 3. LDH (Pyruvic Acid ---> Lactic Acid

7. The reaction produces two ATP molecules for every reaction

8. Releases lactic acid as a by-product of the reaction

9. Glycogen ---> Glucose ---> Pyruvic Acid + ENERGY

   • ENERGY + 2ADP + 2P ---> 2ATP