I just got my Streamlines and it has a list of high intensity workouts to swim faster, not longer. I looked at several and while there were sets doing from 25s to 200s,the workouts didn't seem to me to be what I would call HIIT(High Intensity Interval Training) because they were all doing 3000 yards or more in less than an hour. To me HIIT means race pace and as other threads have pointed out here the average Masters swimmer can't maintain AFAP pace or 100 pace without sufficient rest between efforts. Am I missing something?