The British rider posted a video on his Twitter account, showing him pedalling his Pinarello bike set up on an ergo while linked up to monitors at the GlaxoSmithKline Human Performance Lab in London.
Froome, who followed up his 2013 Tour win with another victory last month for Team Sky, was forced to endure media speculation and fan abuse during the race, leading to Sky taking the unusual step of making some selected medical data available.
— Chris Froome (@chrisfroome) August 17, 2015
His impressive ride up La Pierre St Martin in the first mountain stage raised suspicions like his 2013 ride up the gruelling Mont Ventoux and he had urine thrown at him by a spectator during the 14th stage.
Froome is also using the London lab to try and replicate the conditions expected at next year's Rio Olympics. He will lead the team at the Vuelta a Espana which starts on Saturday.