Answer:
a. True
Step-by-step explanation:
Interval training is a popular exercise program that alternates periods of high-intensity exercise with periods of rest or low-intensity exercise. This type of training can be applied to a variety of exercises, such as running, cycling, or weightlifting, and can be adapted to different fitness levels and goals.
The high-intensity periods of interval training can help to improve cardiovascular fitness, build muscle strength, and burn calories, while the rest periods allow the body to recover and prepare for the next round of exercise. Interval training is often used in sports training and can also be an effective way to break through plateaus and improve overall fitness.