We reviewed and tried numerous ab routines via youtube and have found four of the best for tightening, toning and defining abdominals. For optimal results, ab routines should be done 2-3 times weekly with rest days in between each workout. Consider doing an ab workout on Monday, Wednesday and Friday of each week. You can also find numerous ab routines right here on Skinny Ms.. Check out our most recent workout, Fabulous Abs in 30 Days Challenge.

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