Check your grammar now! : intense or paroxysmal excitement; especially : the rapid pleasurable release of neuromuscular tensions at the height of sexual arousal that is usually accompanied by the ejaculation of semen in the male and by vaginal contractions in the female.
So, even though you may have only burned 250 calories during your HIIT workout, the total calories burned after will be far greater. Those calories, plus the 250 burned during the HIIT workout surpasses the 400 burned during the slow, steady-state workout by a LONG, LONG way.
High-intensity circuit training (HICT) is a close cousin to HIIT, except for instead of using it in a sole cardio capacity, intervals are combined with strength training to provide you with a potent muscle building and fat loss combo. For example, you might have a circuit consisting of 5 different exercises.