Miranda Kerr stopped by the Tonight Show starring Jimmy Fallon to share some unique exercise tips last night (July 17).

The Aussie model taught the chat show host how he can keep fit even sitting down, with just a few little clenches here and there.

"Because you sit behind a desk a lot, right? Or if you're traveling," Kerr said. "When I'm on an airplane, there's a couple of little exercises you can do when you're sitting down."

"So you can tighten you ab muscles, you can clench and release, clench and release," Kerr explained while perfectly demonstrating the exercises. "And you're butt muscles, you can do that. You clench and release, and then you can alternate."

Trying to keep a straight face Jimmy listened intently, quickly stating that he is happily married to his wife!

Kerr was there to promote her new skincare range, Kora.