I too am confused about the order of this series.I love,love,love,it but by day 6 my legs really need a rest!I love the kickboxing and the plank and had to laugh when a vfer renamed Leaner Legs, Meaner Legs!Does it really matter if I change the order ? I know this is ridiculous but I feel like I have to do it in the order of the decriptions on the cover.And speaking of the covers, it is the content not the cover that I love!!!!!!!! And as always I was not dissapointed.Thanks Cathe, for making working out fun,fun,fun! Sorry so long,Val