"I never weigh myself," she told the online news outlet.
"When I was younger, I used to. But I think it's a bad thing to do, because one day you might eat a little bit more or drink a little bit more and it shows on the scales and you start getting obsessed."
The Tidelands star has been in Sydney promoting her new book, Strong, in which she shares her approach to diet, exercise, and health and wellbeing. It follows on from her fitness collaboration with hubby Chris: app-based training program Centr Fit.
She also told 9Honey that she believes you have to treat yourself now and again, and admits she gives herself one cheat day each week.
"I love desserts and I love sugar," she spilled.
"It's not a life to be suffering all the time, you need to have those moments of pleasure like eating sugar and when I eat it I really want to enjoy it and be happy about it," she added, revealing that pizza and Krispy Kreme doughnuts are often on the menu.
However, the 43-year-old did mention that she has to work a little harder now that she's in her forties to maintain her toned physique – especially on her glutes!
Speaking exclusively to WHO in April, Elsa explained why fitness and nutrition are such a big part of her life.
"I think the most important thing is health," she said. "I think when you eat healthily you feel good about your body. It helps your mentality... when you exercise it makes you feel great, the endorphins kick in."
And, she said, taking the focus off the number on the scales is when you start to see real sustainable progress.
"I always say, look inside yourself and think about it whether you want to lose weight or feel more fit. It changes your mood – you can start the day feeling good. It’s a combination of those items, all the things we’ve learnt from these professionals, that Chris and I wanted to share with people via Centr Fit app."