Massy Arias, a NASM- and ACE-certified personal trainer who has worked with the likes of Jordin Sparks and Kelly Rowland, said that she's a huge fan of circuit training. One of the benefits she ...
This 10-minute workout focuses on strengthening all 360 degrees of your core (yes, that includes your back too), but because Dong begins the set with a series of stretches, arches, and twists that ...
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