HIIT, High Intensity Interval Training, is my favorite class to teach. I love it because it is fast paced and you can get a total body workout in less time.
HIIT is a training technique that alternates periods of high intensity with periods of rest or active recovery. By bringing your heart rate up to 80%-90% of it's max and then back down, your body is working harder than it would keeping your heart rate at a steady level. Because of this, you will burn more fat and calories while you work as well as after you exercise. It also pushes you to use both your aerobic and anaerobic systems which is great for your heart.
HIIT can be done with any type of exercise and different intervals of intensity. Since it is intense, HIIT shouldn't be done more than 1-2 times a week.
Let me know if you have more questions or want to give HIIT a try!