High Intensity Interval Training (or HIIT) is a class exercise based on alternating periods of intense exercise with recovery periods of a lower intensity.
The ratio of high intensity workouts to lower intensity is varied according to fitness levels. So, for example, it could be a one-minute burst of jacks, squats and hillclimbers followed by a short recovery period … and then we go round again!
This routine is perfect for those wanting to lose weight quickly as it keeps you burning fat even after the class. This is because the body simply can’t get enough oxygen during the bursts of intense activity and so speeds up the metabolism for hours afterwards to compensate.