Different types of workouts target various energy systems in the body. For instance, aerobic exercises like running primarily use the aerobic system, providing energy over long durations. Conversely, anaerobic workouts such as sprinting engage the anaerobic system, supplying energy for short bursts of high-intensity effort. Resistance training builds muscle and can also utilize both energy systems depending on the intensity and duration. Overall, understanding how different workouts affect these systems can help in designing effective fitness programs aligned with specific goals.