oh i wouldn't say any of those are easy LOL but i would say BB series b/c they have shorter ab routines except for kpc. i am not sure how long that one is and its challenging on the ball moves she does but i think lorriane modifies in that workout. i don't have CTX so i am not sure how the abs workouts are on those but body max is a real toughie and IS series abs are tough as well b/c she uses medicine ball and stability ball. although i think cardio and weights abs aren't that hard. i havent done this one in a long long time so i am not to sure on that.
kassia
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