A 25-year-old woman has just finished 30 minutes of vigorous weight lifting, which included several sets of squats. Which of the following substances has decreased most significantly in muscle cells of her thighs?

Question

Quizplus · Accepted Answer

During vigorous exercise like weight lifting, muscle cells use glycogen as a primary energy source, leading to a significant decrease in glycogen levels in the muscles.  Vigorous exercise can lead to anaerobic metabolism in skeletal muscle cells. Under these conditions, the cells break down stored glycogen to release glucose for oxidation and energy production. Thus, the level of glycogen would decrease by the largest percentage. Conversely, lactate and carbon dioxide would increase under these conditions.

A 25-Year-Old Woman Has Just Finished 30 Minutes of Vigorous