HiiT stands for high intensity interval training. HiiT is an exercise method in which you switch back and forth between short intervals of high intensity exercise, followed by short rest or recovery periods.
The benefits of HiiT training are several-fold. Probably one of the biggest benefits is that HiiT usually lasts only 30 minutes. This enables just about anyone to be able to get in a great workout regardless of their busy schedules. After all, we can all wake up 30 minutes earlier to get in a workout.
The best thing is that this short 30 minute workout will probably be one of the toughest you will ever do. By working at close to your maximal heart rate, you will be burning the most calories, and causing the most physiological changes to your body that will be beneficial to fat loss.
Not only will you burn fat during your workout, but you will continue to burn fat throughout the rest of the day through EPOC (excess post-exercise oxygen consumption). EPOC is the measurable increased rate of oxygen intake following strenuous activity intended to erase the body’s oxygen debt.
In order to erase the body’s oxygen debt, fatty acids are released and used as fuel for recovery. This all happens in the time after a workout is complete. You will not receive this great benefit simply doing low intensity exercise. You need to be working out in your anaerobic zone at maximal heart rates to really see that added fat loss effect.
This EPOC has been shown to last for over 24 hours. While this is a great benefit, it also means you need to be allowing yourself plenty of recovery time between workouts – at least 48 hours.
To sum up why HiiT works so well: