I did Zuzka's 1st workout on her Power Cardio dvd and let's just say I am humbled! It was tough! I then did the Bonus Abs routine and that was tough too and I skipped one entire set of exercises. With many pauses to catch my breath the cardio segment took me 14 minutes and the abs took me about 12 minutes. I had to skip an ab move where you legs are elevated on a chair in plank position and you do knee tucks. The feet kept slipping towards the back of the chair and the seat is angled so my shins kept hitting the seat. My wrists also arent that flexible so that move made my wrists hurt before my abs ever felt worked. Definitely a new way of working out for me!