Tour de France winner Chris Froome began a series of physiological tests on Monday designed to prove his achievements should not attract suspicion. The British rider posted a video on his Twitter account, showing him pedalling a bike while linked up to monitors at the GlaxoSmithKline Human Performance Lab in London. Froome, who followed up his 2013 Tour win with a thrilling victory last month for Team Sky, was forced to endure rumours and abuse during the race -- leading to Sky taking the unusual step of making the 30-year-old's medical data available. More...