What is the primary source of energy during prolonged exercise?

Practice Questions

Q1
What is the primary source of energy during prolonged exercise?
  1. Glucose
  2. Fatty acids
  3. Amino acids
  4. Lactate

Questions & Step-by-Step Solutions

What is the primary source of energy during prolonged exercise?
  • Step 1: Understand that the body uses different sources of energy during exercise.
  • Step 2: Know that the first source of energy is glycogen, which is stored in muscles and liver.
  • Step 3: Realize that glycogen can be used quickly but gets depleted after a while during prolonged exercise.
  • Step 4: Once glycogen is low, the body starts to use fatty acids as the main source of energy.
  • Step 5: Fatty acids come from fat stored in the body and provide a long-lasting energy source.
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