Froome begins physiological testing ahead of Vuelta a España

Chris Froome (Team Sky) has been undergoing physiological tests at the GlaxoSmithKline Human Performance Lab as part of his bid to respond to the innuendo that greeted his performances during his Tour de France victory last month. Froome, who raced at the Etten-Leur critérium on Sunday, posted a short video of himself at the London-based office on his Twitter and Instagram accounts.

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