AFAA Personal Trainer Certification Practice Exam

What is the role of the anaerobic glycolytic system?

1. Provides energy for endurance events

2. Supports very short bursts of activity

3. Supplies energy for high-intensity, short-duration efforts

4. Facilitates muscle recovery

The correct answer is: Supplies energy for high-intensity, short-duration efforts

The anaerobic glycolytic system plays a crucial role in energy production during high-intensity, short-duration efforts typically lasting from around 30 seconds to 2 minutes. This system activates when the body requires a rapid supply of energy without the immediate availability of oxygen, such as during activities like sprinting, lifting heavy weights, or other explosive movements. It utilizes carbohydrates stored in the muscles and blood, converting them into energy through the process of glycolysis, which does not require oxygen and thus can rapidly produce ATP (adenosine triphosphate). This system's efficiency in providing energy for intense physical activity makes it essential for performance in sports and exercises that require stamina and power over short intervals. In contrast, other systems mentioned do not provide the same quick energy needed for such intense efforts. The aerobic system, for instance, is primarily utilized for longer endurance events where oxygen is readily available to sustain prolonged activities, while the phosphagen system, which operates for very short bursts, may not encompass the slightly longer time frame and intensity that the anaerobic glycolytic system handles effectively. Therefore, the anaerobic glycolytic system is distinctly suited for high-impact, short-duration activities, making it the correct choice in this context.