Exercise

• What happens to our body during exercise?

  our body needs a lot of energy for contraction so the body reacts to the increased demand for energy
• How does the body react to the demand of more energy ?

  • aerobic respiration increases
  • breathing rate and volume increases by breathing more frequently and taking deeper breaths
  • getting more oxygen in the bloodstream
  • the heart rate increases to pump more oxygenated blood around the body
• How is lactic acid produced ?

  Anaerobically,
• What does lactic acid do to the body when exercising ?

  causes the muscles to become fatigued and causes the muscles to stop contracting efficiently and the body has to remove the lactic acid
• What happens when the body needs to remove the lactic acid ?


  lactic acid is transported out of the muscle by blood into the liver and converted back to glucose
• What is oxygen debt ?


  the amount of extra oxygen needed by the body after exercise to deal with the accumulated lactic acid
• What happens to the person during the process of oxygen debt ?

  the person continues breathing rapidly after finishing exercise