Are ab vaccuums effective while sitting?

emmy3111
emmy3111 Posts: 482 Member
edited December 21 in Fitness and Exercise
I recently learned about ab vaccuums here on MFP (had never heard of them before :) ) - and now I'm wondering... I sit at a desk all day, and I would like to know what sort of excercises I can do while seated? Are ab vaccuums still effective while sitting, or do you need to be lying down?

Thanks!

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