The adorable video was taken while the pair visited Newcastle's Nobbys Beach.
Michelle's toned arms and midsection were on show in a figure-hugging sports bra and high-waist black tights.
'My favourite way to train!' Former Biggest Loser trainer Michelle Bridges (right), 50, has revealed that her 'favourite' workout involves her five-year-old son, Axel. The workout is throwing the son she shares with Steve 'The Commando' Willis, Axel, into the air above her head
Who is she? Michelle is best known for her appearance on The Biggest Loser alongside her ex-partner Steve 'The Commando' Willis
The fitness guru accessorised with a green camo hat and black trainers.