Last updated on .From the section Cycling

Froome doing physiological test

Chris Froome has begun a series of physiological tests from which he will share data because he wants to prove people can "trust" his achievements.

Froome last month vehemently denied allegations of doping as he won the Tour de France for the second time.

Team Sky also took the unprecedented step of making data of the Briton's performances available during the race.

The 30-year-old said: "Plenty more testing and analysis to be done, I will be sharing results later in the year."

Speaking to BBC's sports editor Dan Roan last week, Froome said he wanted to "show people that they can trust these performances".

On Monday, he posted a video external-link of him being tested at the GlaxoSmithKline Human Performance Lab in London.

Froome also said he had been simulating conditions in Rio, the host city of next summer's Olympic Games.

He recently said he hopes to compete in Brazil, though the time trial and road race are little more than two weeks after the 2016 Tour.

Froome is preparing to lead Team Sky's nine-man line-up in the Vuelta a Espana, which starts on Saturday.

On Monday, Team Sky confirmed external-link Froome's place at the head of a team featuring Welshman Geraint Thomas and Ireland's Nicolas Roche for the third and final Grand Tour of the season.

Colombian Sergio Henao, Spain's Mikel Nieve and Belarusian Vasil Kiryienka will also support Froome in Spain.

Chris Froome, Geraint Thomas (left) and Nicolas Roche are the only riders from Team Sky's triumphant Tour de France line-up to figure in the team for the Vuelta

"I've had a good rest after the Tour and now I'm ready for my next challenge," said Froome, who is aiming to become the 10th rider to win two Grand Tours in a season.

The three-week race, which finishes on 13 September in Madrid, begins with a 7.4km team time trial from Puerto Banus to Marbella in Spain.

Froome, who was second to Alberto Contador in last year's race, will face Giro d'Italia winner Nairo Quintana, 2014 Tour de France champion Vincenzo Nibali and 2009 Vuelta winner Alejandro Valverde.

Team Sky team: Chris Froome (GB), Sergio Henao (Col), Mikel Nieve (Spain), Vasil Kiryienka (Bel), Christian Knees (Ger), Ian Boswell (US), Salvatore Puccio (Ita), Nicolas Roche (Ire), Geraint Thomas (GB).