I have been doing intervals on mine own a little. today I did warm up 5 min. 5 min up to 6mph and then i jumped it up to a 8 1/2 min pace, did that for 6 min and then recovered bumped it up to 7 1/2 min pace for 3 minutes ,recovered bumped it up to 6min pace 30 sec only. wow was that fast!!! thought i was gonna fly right off the treadmill. anyway, they are called runervals, iactually went back on the site and checked them out again. the vhs are only 12.50. I am like you though, I still want so many of cathe workouts,plus the P90x, and now the runervals also. but i am preparing for a 1/2 marathon in may, I want my time to be better this year. plus for some up coming 5ks.