This is probably the only link you need if you want to understand HIIT training.
Very informative link which gives thorough information of the difference between Low-Intensity Endurance Training and High-Intensity Interval Training as well as how you should approach the running method.
Very informative link which gives thorough information of the difference between Low-Intensity Endurance Training and High-Intensity Interval Training as well as how you should approach the running method.