Planks are a simple, equipment-free exercise that strengthen your core, improve posture, and protect your back ...

The plank is one of the most commonly performed core-strengthening exercises, and whether you're getting your heart-rate up at Barry's or at home (using a Class FitSugar video, per chance??), there's ...

The plank drag is a plank variation that adds some weight and movement to the exercise, which I find makes it more engaging ...

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Plank jacks are a combined cardio and core-strengthening exercise. They can help you strengthen the muscles of both the upper and lower body. Adding plank jacks to your exercise routine a few times a ...

Ready for a challenge? Grab a medicine ball and try the juggling plank, which might just be the hardest upper body exercise you'll do all week. There’s no easy plank. That’s a fact. Whether you’re on ...

Add Yahoo as a preferred source to see more of our stories on Google. Margot Robbie, pictured here on the set of the "Barbie" movie wearing a pink and white gingham dress, trained with David Higgins ...