Hollywood's new favorite workout craze is a throwback to the 1980s - here's how it works
The VersaClimber is a cardio machine that mimics the sensation of climbing a mountain.
It's been around since 1981 when it was first created in a mechanical engineer's garage in California.
"The big heyday for VersaClimber was the late '80s. It was running on all cylinders. It was very, very busy," Brett Collins, the sales manager of Versaclimber, told ESPN.
Now, it's experiencing a comeback and everyone from Lady Gaga to Hilary Duff swear by the machine.
Find out what all the fuss is about below: