This table, based on the research of Borg, is handy for quantifying the intensity of exercise. It is used in some research for that purpose, but may also be used in training programs to describe the intensity of training sessions.
This is a great calorie blaster! Not only will you get a cardio workout that burns tons of calories you will also target, train, and tone every muscle in the lower body as well. This is EXTREME so proceed with caution.