Anja Zeidler is a major fitness buff, and you know what that means. It means she's a healthy girl who's gonna live a long life and avoid big medical bills due to a nutritious diet and steady exercise regimen.

Of course, it also means she's got a great ass. And we've found in our time doing "research" on Instagram that girls who work hard to get that toned, well-shaped booty love showing it off. We like to do our part to encourage this type of behavior -- by looking. So look at Anja's booty. And all her other parts. She'd appreciate it.

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