We're here to help you challenge your core (you're welcome) with this plank series. It's part of our Jump-Start fitness plan, helping you move every day for two weeks. This challenge uses all sorts of ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Don’t fancy Russian twists? Try plank windmills instead. They're one of the ...

Sculpt your abs with this equipment-free plank series from Carrie Underwood’s trainer Ready to sculpt your abs? This equipment-free, four-step plank series from Carrie Underwood's trainer, Erin Oprea, ...

This is one of my favorite side plank variations. I love how it works the core and fires up the obliques. But it's also great for the shoulders and upper back. These are all areas I work on regularly, ...

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Don’t fancy Russian twists? Try plank windmills instead. They're one of the best plank variations for also strengthening your ...

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