You know, I felt that way the first time I did it - that my legs weren't fully worked out. Then I did the premixes - just lower body, and just upper body. I liked those, I guess because that's how I am used to working out.
THEN I did the original routine a second time. And I wondered what in the HECk was I thinking, that it didn't give me a good workout??? Maybe it's because this time I knew more of what to expect, and I could really put my all into it.