Gwyneth Paltrow surprised photographers yesterday when she joined muscle mania Madonna at her London gym. The duo looked suitably sweaty and exhausted as they left after a two hour workout, something the pop singer religiously completes every day. Upon departing pap shy Gwyneth tried to hide her face as she giggled with Madonna at the sight of the paparazzo. Luckily for Paltrow, her pals home is one door down from the home made gym, so she was only a short pace from a safe haven. Note to Chris Martin: I'd be moving all the protein shakes from the cupboards pronto. Pictures by Splash News / Lawrence / MacFarlane