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The Anaerobic Energy System: The Source of Rapid Energy

Anaerobic literally means “without oxygen.” The anaerobic energy system is activated during activities requiring quick bursts of energy, such as lifting weights, running short races, jumping, and throwing. The anaerobic energy system will also be called on to help the aerobic system during the work intervals in your HIIT workouts. Essentially, you are going to power your challenging HIIT work intervals with your aerobic and anaerobic energy systems working as a team. Together they will give you the ATP fuel you need to exercise.

The Muscles Are the Engines that Do the Work

Finally, we’ll complete the story of how the body powers your HIIT workouts with an overview of muscles. Muscles are of great interest to exercise enthusiasts and scientists (and beachgoers, too). Your muscles attach to the skeleton and contract continuously during exercise. Muscles are powered by ATP, which comes from the aerobic and anaerobic energy systems. Your bones provide the structure for the muscles to do their work, enabling your body to move. Think of muscles as the engines driving your body’s movements and the skeleton as a complex arrangement of levers, fulcrums, and force arms that carry out the movements. As you continue to challenge the muscles of your body, they rapidly learn and adapt to work harder and function better. Regularly doing HIIT workouts is going to lead to a healthier, stronger you. Let’s keep going!