Dancers know that flexibility is key, and many will go to great lengths to work on stretching and strengthening — even if it means spending mega bucks on training products.

To the rest of the world, the tools dancers use, such as arch stretchers and overstretch bars, look absolutely terrifying, like torture devices. (As if pointe shoes weren't torture enough!) Click through to see dancers' secret contraptions.

Foot stretchers

Instagram/@balletfootstretch

Despite its name, this tool is not used to make feet longer or bigger. (Who would want stretched out feet, anyway?!) Foot stretchers are used to develop and perfect the foot's arch. Elastic or velcro holds the foot down while the heel sits in the curve of the base. Some versions are longer to stretch the legs, too.

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