Victoria Beckham
knows how to multitask!

The former Spice Girl has figured out a way to get a workout in on her busiest days -- but, of course, she isn’t going to change out of her heels, even to hit the treadmill.

The fashion designer took to Twitter to show off her brand new treadmill desk, writing, "Thank u @SusieCollege. Every office should have one of these, work out and work at the same time!! Genius!! X vb."

In the photo, the 39-year-old is standing on the treadmill while gazing at her computer screen. She's rocking a long black overcoat and matching sky-high stiletto boots.

The brunette beauty looks glamorous -- as usual -- but we don't think she'll be able to work up a sweat in those five-inch heels!

Would you try out a treadmill desk? Sound off below, and click "Launch Gallery" above to see more pop stars, then and now.

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