This is a very nice stability ball ab workout. I would agree with Dawn's review and that it is high-intermediate in intensity. I may have not found it challenging enough if it didn't incorporate the use of weights. It is the weights that make this workout unique for me. The weights are used by holding them at your collarbone and using them during crunches, which definitely makes them more intense and effective. You also use them during seated side-stretches and a few other moves involving large movements with the weight overhead while you sit up or do a crunch to the side. This really works your core. Not every move uses weights, and you don't need them if you don't want to use them, it just makes this more effective.

This workout is a little more time efficient than some of the other Core Secret workouts. Gunnar spends less time explaining the moves, which I appreciate.

One thing I find a little strange is that he includes a lot of stretching in the warm-up and not much when you are done. I actually don't mind this, because I have been using this workout after an outdoor cardio workout, so it works out perfect for me to get some stretching in then. I just found it different that he included lower body stretches in an ab workout. The workout is chaptered (although not on every exercise) so you can skip the warm-up if you don't want to do it.

I enjoy Gunnar in this workout, as I do all the other Core Secrets workouts. He is slightly entertaining (without being too much) and gives good encouragement and form pointers usually.

Lisa C