April 01, 2016 06:47 PM

Instagram

Actress Bella Thorne is sharing her best #workouttip.

“I always stretch before my workout and after to make the muscles grow longer and slimmer,” the Disney star, 18, posted along with a photo of herself at the gym wearing a black sports bra and drawstring pants.

RELATED: Bella Thorne Frolics in the Surf in Swim Jorts and an Underboob-Baring Crop Top

Looks like her stretching is working! Thorne’s stomach looks extra toned and lean in the Instagram pic she shared on Thursday.

Thorne showed off her tiny waist again in a photo posted on Friday, in which she is wearing a gray knit top with a deep cut-out and a high-waisted gray bottom.

RELATED: Bella Thorne Posts Makeup-Free Selfie to Celebrate Getting Over Her Skin Insecurities: ‘I Used to Cry Every Night

“There is nothing more rare, nor more beautiful, than a woman being unapologetically herself; comfortable in her perfect imperfection,” she captioned the photo. “To me, that is the true essence of beauty.”

—Gabrielle Olya, @GabyOlya

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