1.4.1 Immediate effects during exercise

• During exercise, breathing rate increases to bring more oxygen into the body and remove more carbon dioxide.
• During exercise, heart rate increases to circulate blood faster and deliver more oxygen.
• Arrange the sequence of muscle changes during exercise:

  1️⃣ Muscle temperature increases

  2️⃣ Blood flow increases

  3️⃣ Muscle fatigue may occur
• Match the metabolic changes during exercise with their effects:

  ATP production ↔️ Provides energy

  Glucose usage ↔️ Primary fuel during high-intensity exercise

  Fat usage ↔️ Primary fuel during low-intensity exercise

  Carbon dioxide levels ↔️ Increase due to enhanced respiration
• What happens to breathing depth during exercise, and what is this increase called?

  Becomes deeper, tidal volume
• What happens to stroke volume during exercise?

  Increases
• Muscle fatigue during exercise can occur due to the buildup of lactic acid.
• What are immediate effects of exercise defined as?

  Changes during exercise
• The respiratory changes during exercise meet the increased oxygen demand and carbon dioxide production of working muscles.


  True
• Cardiac output is the product of heart rate and stroke volume.


  True
• Why does muscle temperature increase during exercise?

  Muscles generate more heat
• During high-intensity exercise, glucose is used as the primary fuel.