This is a nice intermediate stability ball workout. It is one of the original 3 Core Secrets workouts that comes with the infomercial kit and ball. It was my favorite workout of those 3 and the only one I kept. I may not keep it indefinitely though.

It definitely focuses on the core more than his other long workout (Full Body Challenge), but it is not nearly as tough as other core workouts (like Core Foundations or Core Synergistics.) Most of the core work comes with full body movements or stabilizing yourself on the ball, instead of more difficult planks and pikes. To make this workout work for me I have to make some modifications.

~ First, I do some planks to pre-fatigue my core.
~ I use a medicine ball for all the leg moves. This modification was born out of not having enough room in my basement to raise the stability ball over my head, and it works really well. Most of the leg moves are legs and squats and have some twisting in them which works the core.
~ I use as heavy weights as possible. There are some (but not many) upper body exercises, and I try to get as much as I can out of each rep.
~ I place my body on the ball to challenge myself as much as possible. I also either lift one leg while sitting, or sometimes even try to lift both legs.
~ I add reps by starting the work while Gunnar is describing the next move. He does this quite a bit in the workout, which would really start to irritate me, if I didn't add my own reps. Luckily it is not too difficult to start while he is talking, since he usually shows you the move right away.

These modifications don't change the workout in general, just make it more challenging for me. It isn't a bother to me because I enjoy working out with Gunnar. Eventually, I will probably move on from this workout, and I would love it if Gunnar made some more challenging workouts with less talk and a few more advanced moves.

For beginners, there is someone showing modifications to make the moves easier, so this workout would be good for anyone new to ball workouts or to someone who is looking for a decent intermediate core workout.

My biggest complaint with the workout are that Gunnar spends too much time explaining the moves (although I know how helpful it is for the audience he is trying to reach). Also, there is not much upper body work. It is enough to make me not want to do another strength routine the following day, but not quite enough for me to feel like it is enough to really count. I ultimately do "count" it, but I wish there was just a bit more work added on. Adding Give Me 20 or the 25 minute workout on to this would actually probably make a more complete routine, but I have gotten rid of these workouts. I will probably use the Quick Fix upper body work as an add-on to this one.

Lisa C