AERIALS: It would be the most difficult trick ever attempted by a woman, but one defending Olympic aerial skiing champion Lydia Lassila is confident she can have down pat by the start of the Sochi Games in February.

With three flips and four twists the `full-double-full-full' has until now been the domain of men but Lassila has safely negotiated the trick during the off-season in water ramp training in Switzerland.

Now she's ready to take it on snow.

"I have done a bunch on water so I feel pretty confident with that trick so it's now just a matter of working through it on snow and having the opportunity to do it," said Lassila.

"I probably won't unleash it until the Olympics. I hope to have it done by the pre-Olympics camp two weeks out from the Games."

Lassila is only aware of two other women who have done the trick on water ramps, the big problem for the Victorian's back-to-back gold medal ambitions being that one of them is outstanding Chinese skier Mengtao Xu.

Mengtao is one of the most dominant women's aerialist of all time.

She won five of six World Cup events last season, finished third in the other and also took out the world championship in Norway.

With the Chinese thought to be already training on snow, Lassila knows the Australians will be a little bit behind by the time they are expected to begin their winter program in Finland around mid November.

But she thinks her new trick will probably be the ceiling for everyone,

"I don't think they (the Chinese) really have anything to hide," she said.

"They are strong - everybody knows that. I don't know that they will surprise us with anything more."

Lassila will get to see just where her main opposition is at when the World Cup gets underway with an event in China at Beida Lake on December 15.

After a rigorous off-season training program, Lassila is also keen to see how her back shapes up after feeling it could have gone completely on her at any stage last season.

The 31 year-old herniated discs in her back late in 2012 and feared they could rupture at any stage.

And while landings on snow will give her a clear picture, she seemed confident about managing any concerns through to the February 7 Games.

"I just have to take it pretty cautiously to begin with and make sure I feel good every day," she said.

"Given where I was last year I am in a fitter and much better state."