Pools are shut due to the pandemic and Campbell can't even borrow weights from her NSWIS Sydney base like other athletes after deciding to drive to Brisbane to be closer to her family before state borders were closed.

It has restricted Campbell to dry land training - namely early morning runs and hosting lunchtime fitness sessions for her four flatmates.

The former world champion admitted in the past she would have been stressing out about losing her edge barely 12 months ahead of an Olympics.

However, Campbell has been steeled by her remarkable post-Rio comeback and was confident she could again rebound from more time spent away from the pool at the 2021 Games.

Campbell took a year off from competitive swimming to regroup from a disappointing Rio Olympics, returning with a vengeance to dominate the 2018 Commonwealth Games and Pan Pacs before grabbing five medals at last year's world titles in South Korea.

"In retrospect that is probably one of the best things I did," Campbell told AAP when asked about her hiatus.

"For me now it gives me the confidence that I will be able to get back and get back quickly, as long as I stay strong and fit during my break.

"When I get back in the pool my body will remember after years of training.

"Having that confidence and knowledge that I will be able to get back allows me to remain calm at the moment otherwise I would already be stressing.

Time out of the pool after Rio taught Campbell all about mental strength.

And the former world record holder reckoned being away from swimming during the pandemic had also delivered an important lesson.

"I don't have a career in athletics," Campbell laughed.

"At the moment I am limited to what I can do on land, and I am not particularly good at anything land-based.

"I made the decision to drive up to Queensland (before border closures) so I don't have access to any gym equipment which the NSWIS is allowing athletes to loan.

"I am trying to keep as fit as possible but recognising I won't be able to get into the water for a while."

Avoiding cabin fever will be another priority for Campbell living in a share house with four others.

Australian Associated Press