She has since given birth to an adorable new bubba - congratulations Sara!
The unstoppable mum-to-be Sara Wiss blew us away with this video of her exercising at 41 weeks pregnant!
Sara Wiss, from Sweden, who works as a personal trainer, said she'd become bored and frustrated waiting for her baby boy to be born so she hit the gym.
'Keep calm! I'm still pregnant,' she wrote.
Fans were blown away by her strength. 'Good Lord, woman! That's amazing!' wrote one.