I have been doing my Jillian Michaels' 6 Week 6 Pack workout once a week since last September and I really have noticed a change in my core strength and physique. At the very least, I think my abs are the flattest they've been since I popped out 2 kids. Never mind that I still have a small hernia giving me a really funny looking outie belly button...
I love this workout but I have been craving change so when I found Michaels' Killer Abs DVD for $10 on Amazon, I couldn't resist.
You can check out a snipit of it here on Youtube:
Its definitely a good value as you get 3 different 30 minute workouts, compared to the 2 half hour workouts on the other DVD. Each one is a different level, so its good if you are starting from a more novice degree of fitness and want to gradually progress to more advanced training.
What I like the most about this DVD, to be honest, is she loses the trash talk she has going in 6 Week 6 Pack. In that video she jokes about wanting to put her participants in the hospital and calls the blonde a Barbie doll. I find that kind of stuff demeaning and obnoxious and inappropriate language for a fitness trainer. There's none of that in this video thankfully. I also like that there is essentially no, or very little repetition of exercises from the other DVD. It's definitely providing me with some variation in my core workouts.
Overall though, I have to say I think 6 Week 6 Pack abs is still the one I would recommend first. I think the exercises target and fatigue the core muscles better and it gets my heart rate up higher. But this could be because I need to use more weight for some of the exercises and/or because some of them require a lot of balance (like crunches done from Warrior 3 or single leg burpees), and my balance sucks, so I am falling over instead of keeping up with the exercise. Perhaps as my technique improves on those, I'll get a better workout. This one might be better if you are not currently super fit as it does provide 3 different levels of difficulty, but don't think that means any of the workouts are 'easy'. Even the level 1 routine will be challenging for a lot of people.
I know I've said it a million times, but I will say it again: if you are sedentary, you are setting yourself up for long-term health problems...diabetes, heart disease, osteoporosis. Even Alzheimer's and dementia risk is increased if you are not physically active. The whole "I don't like exercise" or "I don't have time" excuses just don't cut it. You don't need that much time, space, or money and there are a million different activities that get you up and active. The best way to find the right one for you is to just keep trying new things!