Why one trainer calls the plank variation "no joke." ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Ah, the plank. It may just be one of the most intimidating exercises. Anyone who has shook their way through one knows that the ...

Everybody has a weird album or two in their phone’s camera roll. Mine is titled “Planks.” It holds dozens of screenshots of ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images A high ...

The plank has long been considered one of the ultimate tests of rock-solid core strength. But beyond the classic straight-arm and forearm versions, there are plenty of variations that challenge your ...

George Hood completed around 1,500 sit-ups per day to train for the feat. An Illinois man who spent the past several months training seven hours a day, including 1,500 sit-ups daily, has broken the ...