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#TIUAPPROVED: THESE 3 MOVES ARE KARENA AND KATRINA'S FAVORITE FOR WORKING THAT BOOTY




Image Source: Tone It Up
When we got the chance to sit down with beach babe trainers Karena and Katrina from Tone It Up, we had one question we had to ask before everything else: how do we build a strong butt like theirs? It's no secret that these perpetually bikini-clad women are strong and toned, and we've definitely noticed the results of their seat work (see above).
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