Energy systems

• Adenosine tri phosphate
• ATP releases chemical energy for immediate muscle contraction
• The ATP store lasts for 2-3 seconds
• The ATP-PC system is anaerobic. This means movement can be produced immediately without 'waiting' for oxygen
• High energy bonds between phosphates are broken down to release energy.
• What is creatine phosphate?

  High energy compound that releases energy used in resynthesising ATP
• What is the 'work to rest ratio'

  1:10-12 seconds
• The ATP-PC system last 10-12 seconds
• What is anaerobic glycolysis?

  Breakdown of glycogen to produce 2 ATP
• Disadvantages of lactate system?


  Lactic acid production and will impede muscle contraction
• How long to recover from lactate system?

  8 minutes
• The lactate system lasts 60-90 seconds
• Aerobic system

  1. Aerobic glycolysis
  2. Krebs cycle
  3. Electron transport chain
• Aerobic energy production occurs in the mitrochondria
• Aerobic system relies on carbohydrates and stored fats
• Describe Aerobic Glycolysis

  1. Glycogen converted in pyruvic acid
  2. Using oxygen
  3. Produces 2 ATP molecules
• Describe Krebs Cycle

  1. Pyruvic acid enters mitochondria
  2. Converted into citric acid
  3. 2 ATP molecules
  4. By-products hydrogen and CO2 produced
  5. Hydrogen transported to electron transport chain
• Describe the electron transport chain

  1. Hydrogen is accepted by hydrogen acceptor
  2. In the presence of oxygen
  3. 38 molecule of ATP are produced
• It take 2-3 days to recover from aerobic system