During activities requiring aerobic endurance,

Question

Quizplus · Accepted Answer

During activities requiring aerobic endurance, such as long-distance running or cycling, the primary source of energy is the oxidation of glucose and fatty acids in the mitochondria. Glycogen and glycolysis are used primarily in higher intensity activities and are depleted quickly, leading to fatigue. Oxygen debts are not common in aerobic activities, as the body is able to meet the energy demand through aerobic respiration. Fatigue occurs gradually over time due to depletion of energy reserves, not within a few minutes. Oxygen is required for aerobic respiration.

During Activities Requiring Aerobic Endurance