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.
Meaning if you are eating 2000 calories a day you need to burn MORE than 2000 calories to lose any kind of weight. When I do my 10,000 steps a day I burn over 2500 calories a day. That is calculated via fibit based upon my height and current weight and all, so that # can vary on many factors. it is a very personal calculation I guess you could say.