Energy

• what is used up very quickly and why??

  So much energy is needed when muscles contract so ATP used up very quickly

  • ATP must be continually regenerated so exercise can continue
• What are the 3 main ways ATP can be continually regenerated?


  aerobic respiration

  anaerobic respiration

  ATP-Phosphocreatine (PCr) System
• How is most ATP generated?


  Via oxidative phosphorylation in the cells mitochondria

  • aerobic respiration
• Aerobic respiration only works when what?


  When there is oxygen, so it is good for long periods of low-intensity exercise
• What happens in anaerobic respiration?


  ATP made RAPIDLY by GLYCOLYSIS
• What is the end product of glycolysis (anaerobic respiration)?


  Pyruvate, which is converted to lactate by LACTATE FERMENTATION
• issues with lactate - anaerobic respiration?


  lactate can quickly build up in the muscles and cause MUSCLE FATIGUE
• What is anaerobic respiration good for?


  Short periods of hard exercise

  • eg 400m sprint