Well, it really varies depending on when I do it in relation to my leg w/o day. Like my gym's elliptical goes up to 15 as the max intensity. Usually I do a 4-5 minute warm-up at level 8, then use the 13th intensity setting for the first 6 intervals. By this point I am starting to slow down by the last couple of seconds of the interval bouts so I lower the intensity to 12 for the 7th interval, and 11 for the 8th and final interval. Then I lower the intensity back down to 8 for a 5 minute cooldown and also usually do a little light jogging or biking for a couple of minutes. If it is a Thursday though, which is the day after my leg day, I usually do everything the same but use 2 intensities lower for each stage. This is just how it works out for me. The only thing I judge how good of a w/o my session is is by how taxed it makes me, so as long as you are giving it a
maximum effort it should be good. Oh yeah, I usually use the 6th grade, which is out of 20. It is almost like a walking grade, not too elevated really.