February 19, 2016 12:33 PM EST

Ronda Rousey revealed on Friday that she unknowingly posted a photo to her Instagram that had been ‘altered’ to make her arms appear smaller. She made the announcement in a new post featuring the original image — a picture that was taken of the former UFC champion during a recent appearance on The Tonight Show — side-by-side with the retouched one. “I was sent a picture to share on social for Fallon that was altered without me knowing to make my arms look smaller,” she wrote.

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Rousey apologized for sharing the photo, explaining that she does not subscribe to the practice of photoshopping. “This goes against everything I believe and I am extremely proud of every inch of my body,” she said. “I can assure you all it will never happen again. I could not be more appalled and hope you all forgive me.”

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Write to Megan McCluskey at megan.mccluskey@time.com.

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