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.
The Average Burn. A 150-pound person burns approximately 119 calories in 10 minutes doing interval cardio, according to Fitclick.com. This would be similar to the type of workout you would do in the HIIT 15, 20 and 25 classes.