THE future's not going to be bright if Queenslanders don't start tightening their belts, according to CQUniversity's Dr Betul Sekendiz.
But the exercise and sport management expert said overweight and obese children couldn't change their lifestyle habits without good examples set by parents.
The Health of Queenslanders Report 2014, released in November, revealed one in five children were overweight, while one in 10 were obese.
The report also found 46% of children were physically active when travelling to school, but 34% spent too long in front of a screen.
Dr Sekendiz said the results were "worrisome" and highlighted the need for more preventative health measures and education.
With children learning from family, Dr Sekendiz said research had shown links between overweight parents and children.
She said for children to improve their future outlook, changes needed to happen in the whole family.
While Dr Sekendiz said it was never too late to make lifestyle changes, they didn't need to be drastic. Rather than spending hours at the gym, Dr Sekendiz said small increases in physical activity, like taking the stairs or walking children to school, could improve health.
Taking time to cook meals as a family instead of ordering fast food was also something Dr Sekendiz said would have children learning the right eating habits.
When it comes to sitting in front of a screen, she said making sure children, and adults, were taking a break and moving every 15 minutes was an effective way to help reduce diabetes risk.
Health of kids
Two in three eating cakes and biscuits daily
Six in 10 drinking sugary drinks daily
One in two sunburnt in the past year
Nine in 10 fully immunised at 5 years
One in ten 14 to 17-year-olds risky drinking
One in 30 14 to 17-year-olds smoking daily
Source: The Health of Queenslanders 2014