ab circle pro?

I've never used one, but I hear it's bad on your back unless you have a really strong back.

All those Ab machines are a waste. You can't spot reduce.
Doing sit-ups doesn't make fat come off your mid-section.
If you chewed gum everyday would your cheeks get thinner?
Last year I lost 25lbs and now my abs are showing --- Friends always say, "Wow, how many sit-ups did you have to do to get those?" My reply, "Zero" The only thing I do is weight training. No sit-ups.


Plank is the only thing I do for ABS:

sorry guys. totally disagree! I have tried the ab circle pro (my sis has one) i was not a fan. puts a ton of strain on the back. I do have an ab lounger sport. i'm telling you... after 1 week i noticed definate improvement in my abs and overall core strength. i can do hundreds of crunches and situps a week and not notice a difference. but the ab lounger lets you arch back and has a better range of movement. i do about 10 minutes 3 times a day. i was plateaued, but after adding the ab lounger i have jump started my weight loss and lost an extra 2 pounds in a week.