Exercise & Oxygen Debt

• Why does exercise increase the need for respiration?

  Exercise requires more muscle movement and energy
• What happens to breathing rate during exercise?

  It increases to supply more oxygen
• What is the relationship between muscular contraction and respiration?

  Muscular contraction requires energy from respiration
• How does the body respond to increased oxygen demand during exercise?

  By increasing breathing rate and heart rate
• What is anaerobic respiration?

  Respiration without sufficient oxygen
• What is a byproduct of anaerobic respiration?

  Lactic acid
• What sensation does lactic acid buildup cause?

  Burning sensation in muscles
• What is oxygen debt?

  The need for extra oxygen after exercise
• How is lactic acid removed from the body?

  By reacting it with oxygen in the liver
• What is the first step in measuring breathing rate?

  Count chest rises and falls
• How can heart rate be measured?

  By measuring pulse on an artery
• What type of questions might be asked about exercise effects?

  Measuring changes before and after exercise
• What are the effects of exercise on the human body?

  • Increased respiration rate
  • Increased heart rate
  • Increased oxygen demand
  • Possible shift to anaerobic respiration
  • Lactic acid buildup
  • Oxygen debt repayment
• What are the steps to measure breathing and heart rate?

  1. Count chest rises and falls for breathing rate
  2. Measure pulse on wrist or neck for heart rate
• What happens to the body during high-intensity exercise?

  • Increased energy demand
  • Shift to anaerobic respiration
  • Lactic acid production
  • Oxygen debt occurs