Chris Froome has embarked on a series of physiological tests in London and plans to share his performance data, in a bid to prove his achievements can be "trusted".

Froome started a series of tests at the GSK Human Performance Lab in London yesterday, and shared pictures and a video taken from the lab on his Twitter account.

The 30-year-old Briton emphatically denied doping accusations both during and after winning the Tour de France for the second time, when Sky took the unprecedented step of releasing his performance data during this year's race.

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Froome said: "Plenty more testing and analysis to be done, I will be sharing results later in the year!".

Froome also published a video clip of some on-bike testing on his Twitter account, and a photo montage of images taken from the GSK Human Performance Lab in South West London.

Earlier this month Froome told the BBC he had wanted to do physiological testing for a while, both for the public to understand and trust his performances as well as for himself.

"I do want to be a spokesman for clean cycling."

"I believe somebody has to stand up for the current generation.

"I'm happy to do that. I'm happy to release more information when I can and to show people they can trust these performances."

"It's something I wanted to do from the start of the season, even before all this came up during the Tour," he said.

"The physiological testing could even help me understand what makes me who I am and what it is about me that allows me to make the efforts I do."