CrossFit Kia Maia Gym owner Lachlan McLeod posted a video online of himself wearing a 6kg weight ball during a workout to mimic the extra weight his wife was carrying while exercising throughout her pregnancy.
The video then shows him doing squats, chest presses, burpees, rowing and even running down the street outside the gym. The end of the video shows Mr McLeod out of breath squatting against a wall.
Lachlan McLeod spoke to Duncan Garner.
Watch the video for the full interview.