Roger Federer's unique exercise routine

Roger Federer is known for many things, amongst them being his silken movement on the court. He glides through the courts never giving off the faintest sign of any physical movement.

And this season, he is looking fitter and sharper and looks to have found his groove again.

Perhaps this rather unique exercise routine is the reason for his resurgence this year.

http://www.youtube.com/watch?v=PNcPbAHkcDM