Interval training is best described as:

Interval training is best characterized by alternating periods of high intensity and rest. This training method is designed to improve both aerobic and anaerobic performance by incorporating bursts of intense activity followed by periods of lower intensity or complete rest. The high-intensity segments push the body to work at a maximum or near-maximum effort, which can lead to improved cardiovascular fitness, increased speed, and enhanced overall athletic performance.

In contrast to other forms of training, such as sustained low-intensity exercise, which focuses on maintaining a steady pace over a longer duration, or continuous moderate exercise, which emphasizes a stable level of intensity without varying effort, interval training introduces variability that challenges the body to adapt and improve. Additionally, unlike strength training, which primarily focuses on building muscle mass and strength through resistance, interval training can include a variety of activities, including running, cycling, swimming, or any aerobic exercise pattern, making it a versatile choice for enhancing fitness.