'It's a cultural thing': England coach's bizzare fitness claim after latest Ashes drubbing

England coach Jon Lewis has bizarrely blamed his side's lack of fitness compared to the Aussies on Australia's outdoorsy lifestyle.

The comments came after another miserable performances from the tourists in the women's Ashes, belted in the third and final T20 in Adelaide by a whopping 72 runs.

The victory seals a sweep of the white-ball matches, with only the historic pink ball day-night Test at the MCG remaining.

READ MORE: Courier's enormous call on Aussie coaching genius

READ MORE: Djokovic slaps injury sceptics with simple post

READ MORE: Keys' 'uncomfortable' journey from 14-year-old prodigy

Set 163 for victory, England's chase barely got out of second gear, bowled out for 90 in the 18th over.

England were reduced to 7-48 in the ninth over before some late hitting from Heather Knight gave the tourists' score some respectability.

The biggest partnership England could stitch together was just 29 and lasted barely five overs.

Several former players and pundits, including retired spinner Alex Hartley, had been critical of England's fitness heading into the series.

But speaking to media after this latest loss, Jones said Australia's outdoorsy lifestyle was behind the differing fitness levels, and not a lack of work ethic.

"You guys need to come watch [the team train], I promise you, I cannot defend them more around how hard they work on their physicality," he said.

"They are incredibly dedicated to what they do. I've never seen a cricket team work like this cricket team, and I've worked in professional cricket for 31 years.

"I walked from Bondi to Coogee last Sunday evening and pretty much every Australian in the eastern suburbs is in the water, doing surf lifesaving, playing touch rugby.

"For me, that's a cultural difference. I definitely think Australia have an advantage in terms of athleticism, and also our talent pool at the moment is small, so it's important for us to grow the game."

Speaking on TNT Sports shortly after play wrapped up, Hartley said the England dressing room was all "doom and gloom".

Following a discussion about what the England squad was lacking, Hartley said she didn't believe the tourists even had the depth to be able to make those changes.

"Yes there are some players at home ... that could be here and could change games of cricket, but Australia's second XI at the minute might beat England's first XI," she said.

Georgia Wareham was the pick of the Aussie bowlers, claiming 3-11 from her four overs. Darcie Brown took two, with Megan Schutt, Alana King, Annabel Sutherland and Tahlia McGrath picking up one each. Although she didn't bowl, Ellyse Perry claimed a run-out.

Having won the toss and elected to bat, Beth Mooney did most of the damage for the Aussies, belting an unbeaten 94 not out.

Post-match, Mooney said the Aussies were eager to inflict a series whitewash, but were wary of the different challenge presented by the lone Test.

"(A whitewash) has been spoken about a little bit in the last few days," she said.

"The Test match is going to offer a different challenge for both teams, I think, across that four-day period.

"But certainly we won't be wanting to let England back into the series at all. The ruthless nature of this group is that we want to compete and really drive it home.

"England will have a bit to think about in the next few days, and I'm sure they'll come out really hard and want to get a Test match win, as we would as well."

But Lewis said he had no concerns about his squad's ability to lift for the Test and avoid the white-wash.

"We've got a really resilient group of players who are really excited about the opportunity to play Test cricket and under lights at the MCG," he said.

"I don't feel like we'll need to work hard with the players to get them in a space where they want to go and attack that game."