A new study has revealed that people who smoke cannabis walk differently to those who don't.

Marijuana smokers move their shoulders less but their elbows more, the study has found.

Their knees also move differently, swinging faster.

The study was conducted by researchers at the University of South Australia.

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The differences identified are very subtle and do not appear to reflect an impact on balance or neurological movement.

"The results suggest that history of cannabis use is associated with long-lasting changes in open-chain elements of walking gait, but the magnitude of change is not clinically detectable," the researchers wrote.

"Further research is required to investigate if the subtle gait changes observed in this population become more apparent with ageing and increased cannabis use."

The research was published in the journal Drug and Alcohol Dependence. It analysed 44 participants, split equally between smokers and non-smokers.

As more countries are moving towards decriminalising marijuana, the study authors are calling for more research to be done on the impacts of the drug.