Jen Selter, the famous Twitter model who's known for her exercise knowledge as well as her muscular behind, posted a new photo of herself that displays her frontal image, which is about as muscular as her backside.

Jen Selter Poses For Vanity Fair

The photo that was posted on Wednesday shows Selter in a black-and-white shot as she wears matching lingerie. She has one hand by her hair and another holding a phone as she takes a selfie. Most of her body can be shown, which takes most of the focus on her abs as well as her curvy backside.

Selter simply captioned the photo as "Selfie."

Jen Selter Making Her Butt Even Bigger?

The model generally posts photos of herself on Twitter every day. She posted another picture on Wednesday that displays more of her buff yet petite torso.

In a closeup shot, the model is pulling weights down as her side is shown. She's wearing a black top and tight grey pants as her bottom is exposed along with her biceps.

Selter captioned this photo, "For every minute you spend debating whether or not to work out, you could be working out !"

While Selter is known for her scandalous yet motivational photos, she is also known for posting tweets that may delve into her personal life.

"No matter how dirty your past is, your future is spotless!" Selter tweeted on Wednesday.

On Monday, she wrote, "it's not about having time, it's about making time." That same day she wrote, "once is a mistake, twice is a choice."

Tags: Jen Selter Twitter