Celebrity Personal Trainer Sia Cooper on Why Target Zone Training Works

The Instagram fitness star spills all of her workout secrets. Want to Boost Your Butt and Tone Your Thighs? Try These Tips From Instagram Personal Trainer Sia Cooper Let’s be honest: no matter how hard we hit the gym and how frequent we attend our spinning and yoga classes, we all have that one trouble area (or maybe a couple of areas) that seems almost impossible to tone. Or, on the flip side, maybe you have a specific area of the body — like your butt, for example — that…

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