During prolonged low-intensity exercise, the body primarily utilizes fats as a source of energy. The process of fat oxidation increases as the intensity of exercise decreases, allowing for greater endurance over extended periods. As glycogen stores become depleted, the body shifts to burning fat to maintain energy levels. This is particularly relevant during activities like walking or light jogging. Additionally, training at low intensity improves the body’s capacity to utilize fat for fuel, thereby enhancing overall endurance performance. Thus, proper conditioning develops the efficiency of fat utilization.