"Hitting the wall," or experiencing a sudden feeling of overwhelming fatigue occurs after a person has been exercising for a long period of time and the body has run out of what fuel?

Question

Quizplus · Accepted Answer

"Hitting the wall" or experiencing sudden fatigue is a common phenomenon in endurance events like marathons or cycling, and it typically occurs when the body's glycogen stores are depleted. Glycogen is a complex carbohydrate that is stored in the liver and muscle tissues, and it is the body's primary fuel source for sustained exercise. When glycogen stores are depleted, the body must rely on fat stores for energy, which is less efficient and produces more fatigue-causing waste products like lactic acid. Therefore, the best answer is D, glycogen.

"Hitting the Wall," or Experiencing a Sudden Feeling of Overwhelming