Aerobic and Anaerobic

• What determines if an activity is aerobic or anaerobic?

  Whether the body uses oxygen or not
• What is anaerobic exercise?

  Exercise performed in the absence of oxygen
• Why can anaerobic exercise only be sustained for a short time?

  Due to the build-up of lactic acid
• What are examples of anaerobic activities?

  Sprinting, long jump, and javelin throwing
• What does the anaerobic respiratory system break down glucose into?

  Lactic acid
• What is the equation for glucose breakdown in anaerobic respiration?

  $\text{Glucose} \rightarrow \text{energy} +$$\text{lactic acid}$
• What is a by-product of the lactic acid energy system?

  Lactic acid causes fatigue and discomfort
• Why is the winner of a 400 m race typically the athlete who slows down the least?

  Because lactic acid causes fatigue
• What causes fatigue in anaerobic exercise?

  Lack of oxygen and lactic acid build-up
• What is oxygen debt?

  The need for oxygen to restore anaerobic systems
• What happens to breathing after exercise?

  It becomes deeper and more rapid
• What is the purpose of the additional oxygen after exercise?

  To break down lactic acid and replenish stores
• What does the body use oxygen for after exercise?

  To break down lactic acid to carbon dioxide and water
• What does the body replenish after exercise?

  Creatine phosphate stores
• What determines if an activity is aerobic or anaerobic?

  Whether the body uses oxygen or not
• What type of exercise is aerobic exercise associated with?

  Low-intensity, longer duration exercise
• What is the primary function of the aerobic respiratory system?

  To produce energy during low-intensity exercise
• Why can aerobic exercise be sustained for a prolonged period?

  There is lots of glucose available and low lactic acid
• Name an example of an aerobic activity.

  Marathon running
• What is the chemical equation for aerobic respiration?

  Glucose + oxygen → energy + water + carbon dioxide
• What food sources supply glucose for the aerobic energy system?

  Rice, bread, potatoes, bananas
• What food sources provide fats for the aerobic energy system?

  Butter, oils, cheese, milk, nuts
• What are some athletics events that mainly use the aerobic energy system?

  • 5,000 metres run
  • 10,000 metres run
  • Marathon
  • Race walking
  • Triathlon
  • Biathlon
• What is the role of glucose in the aerobic energy system?

  It supplies energy for long periods
• How does aerobic exercise differ from anaerobic exercise in terms of energy production?

  Aerobic uses oxygen, anaerobic does not