Hi Jen
The premixes are shorter because they contain segments of the workout that are lumped together so you don't have to rewind or fast forward to get to a part of the workout you're interested in doing.
On lowmax there are several premixes. The only I usually do includes the warmup, cardio intervals 1-4, the first 4 intensity blasts and the cooldown. It's about 45 minutes.
There is also one that has the warmup, cardio intervals 4-7 with the intensity blasts and the cooldown. I think it's about the same amount of time (45 minutes).
Another option is just doing the 7 step combos (no intensity blasts) with the warmup and cooldown. And yet another option of just the 7 intensity blasts that I think comes out to 20 minutes. I haven't done this but I think it also has the warmup and cooldown too.
The premixes allows you to customize your workout but unlike other workouts on dvd that are just chaptered, cathe has taken all the guess work out by creating smaller and perhaps more focused workouts within the dvd since you can adjust it to your needs on a particular day or if you're like me and new to her, it allows me to learn the moves so I can get through it.
I think it will be awhile before I can get through the entire lowmax workout so the premixes really help. I love that I can grow with it.
You're right it is challenging. Don't give up. I watched it on slow motion for a few days and practiced alittle each day until I got it. It's worth the effort and you'll be so proud of yourself when you learn the routine. I started out on a 6" step and sometimes if I'm having some back pain,(I've had 3 back surgeries) I'll still use the 6" height. I have done it on 8" and let me tell ya, it really knocks it up a couple of notches!
I love cardio + weights too. It's really fun and another great option for an AWT workout. I've been doing that one alot lately.I guess it's because I've just learned the rountine. The music is fun too. Really inspiring...
Good Luck!