Build strong core muscles without weights, just using these three crunch variations from a functional training coach.
Crunches, or V sit-ups, strengthen your abs, which can improve balance and posture. Follow these steps to perform the move: Sit so your thighs and upper torso form a V-shape, with your lower legs ...
Say goodbye to basic crunches and hello to three muscle-torching crunch variations to build core strength. For this workout, you just need one of the best yoga mats and a resistance band or loop ...
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