What is a key difference between circuit training and interval training methods?

The distinction between circuit training and interval training lies primarily in their structure and objectives. Circuit training involves performing a series of exercises in a sequence, targeting different muscle groups or fitness components, often incorporating strength and cardiovascular elements in a single session. This method is designed to provide a full-body workout by alternating between different stations or exercises which can improve strength, endurance, and overall fitness.

On the other hand, interval training focuses on alternating between periods of high-intensity efforts and lower-intensity recovery periods. This method is specifically designed to enhance cardiovascular endurance and can improve strength depending on the type of exercises performed during the high-intensity intervals. While both forms may include aspects of endurance, the core principle of interval training is its structured alternation of intensity levels, making it particularly effective for boosting aerobic capacity and metabolic conditioning.

Thus, the emphasis on endurance and strengthening within the context of varying intensity levels is what primarily defines interval training, making it the correct choice for distinguishing it from circuit training.