Semper Fit Basic Fitness Course (SFBFC) Practice Exam

The key difference between aerobic and anaerobic exercise lies in the role of oxygen in energy production. Aerobic exercise requires oxygen to generate energy, making it suitable for activities that involve prolonged, moderate intensity efforts, such as running, swimming, or cycling. During aerobic activities, the body uses oxygen to convert carbohydrates and fats into energy, supporting extended periods of exercise without fatigue.

In contrast, anaerobic exercise occurs in the absence of sufficient oxygen and is characterized by shorter bursts of high-intensity activity, such as sprinting or weightlifting. During anaerobic workouts, energy is generated through processes that do not rely on oxygen, leading to quicker fatigue. Therefore, recognizing that aerobic exercise depends on oxygen for sustained energy production is crucial for understanding the physiological differences between these two forms of exercise.