Toward the end of prolonged physical effort (with glycogen reserves low), circulating FFAs supply nearly __________% of the total energy required.

Question

Quizplus · Accepted Answer

During prolonged physical effort, especially when glycogen reserves are low, circulating free fatty acids (FFAs) become a primary energy source, supplying nearly 80% of the total energy required. This shift occurs as the body seeks to preserve its limited glycogen stores and relies more heavily on fat metabolism.

Toward the End of Prolonged Physical Effort (With Glycogen Reserves