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.
Both body weight and level of intensity impact just how much caloric burn you will experience. Harvard Heart Letter notes that an individual riding the stationary bike at a moderate level for 30 minutes will burn an average of 210 calories at 125 pounds, 260 calories at 155 pounds and 311 calories at 185 pounds.