Exercise

• Respiration


  The process that provides energy for the body
• Types of respiration

  • Aerobic
  • Anaerobic
• When resting


  The body doesn't need a great deal of energy
• During exercise


  The body needs a great deal of energy for muscle contraction
• Aerobic respiration increases during exercise

  1. Breathing rate increases

  2. Breathing volume increases

  3. Heart rate increases

  4. More oxygen supplied to bloodstream
• Sometimes not enough oxygen can be supplied to the muscles, especially during hard exercise
• Anaerobic respiration takes place in the muscles during exercise

  1. Glucose oxidation is incomplete

  2. Lactic acid builds up

  3. Muscles become fatigued
• Oxygen debt


  The amount of extra oxygen the body needs after exercise to deal with the accumulated lactic acid
• Lactic acid is transported out of the muscles by the blood, taken to the liver, and converted back to glucose
• Reacting with and removing the accumulated lactic acid requires oxygen