Final answer:
Your body can use multiple energy systems at the same time, depending on the intensity and duration of the activity.
Step-by-step explanation:
False. Your body can use multiple energy systems at the same time, depending on the intensity and duration of the activity.
For example, during low-intensity activities such as walking or light jogging, your body primarily relies on the aerobic system, which uses oxygen to break down carbohydrates and fats for energy. However, during high-intensity activities like sprinting or lifting heavy weights, your body switches to the anaerobic system, which uses stored ATP and creatine phosphate for quick bursts of energy.
Therefore, the energy systems in your body work in coordination to provide the necessary energy based on the demands of the activity.
Learn more about Energy systems in the body