My wife rented this dvd from the local library as she wanted to be sure before she bought it. I agreed to do it with her the first time for some support. I am a fit guy already excercising 3 times a week, and although i could cope with the workout, the not so 'fit' wife was struggling to keep up. This dvd is definately not for the 'fitness dvd virgin' as the routines take some grasping, and the severity of the two main sections of the workout got me working hard! The length of the workout is approx 1 hour, but to be honest if you get into it it flies by. If you do choose this dvd as an amateur, take it step by step, and stick with it -it will be worth it in the long term. (ps - does anybody know any dvds with give you just as much of a workout without any fancy girly steps which have you looking puzzled at the screen trying to figure out which foot should go where next??)