Do you want to lose weight?
Increase your fitness levels?
Are you spending hours doing cardio in a gym but not getting satisfactory results for all that effort?
If you answered yes to these questions then it's probably about time you stopped doing your moderate intensity cardio and started High Intensity Interval Training (HIIT) so you can start stripping off the weight and increasing your cardiovascular performance.
How does it work?
Interval training is a form of exercise in which you switch between different intervals, one being the working interval where you are working anaerobically, and the other being the resting interval where you are working aerobically.
During the working interval you perform your change exercise, whether running running biking, swimming or using any type of cardio equipment at a maximum speed which you could not possibly maintain for more than 2 minutes (usually 30sec to a minute). During this interval your body is burning glycogen stores in your muscles to create energy without the use of oxygen. This creates an 'oxygen debt' which your body must pay back latter. This process of energy creation has a by-product called 'Lactic Acid' which builds up in the muscles and attributes to the 'burning' sensation you may feel in the working muscles.
After each working interval you slow down to an easy pace for a recovery interval which should last for at least as long as the working interval. During the recovery interval your respiratory and cardio system work hard to pay back the oxygen debt you have accumulated, and to clear the lactic acid that has built up in your muscles. During this recovery interval your body uses oxygen to burn stored carbohydrates and fat for energy.
This high intensity type of training also causes large amounts of growth hormone to be released which aides in fat loss and has even been called 'the body's fountain of youth'.
The main advantage of High Intensity Interval Training is it increases your metabolic rate for a period of time after you have finished working out so even when you are resting at home that night, you are still reaping the rewards of your exercise and burning fat!