Brother Colm O'Connell gives insight on David Rudisha's training

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Brother Colm O'Connell has coached a multitude of world and Olympic champions in the past, but David Rudisha may be the most special athlete the Irishman has ever mentored. Before the Zurich Diamond League meet, Brother Colm discusses Rudisha's buildup to the Olympic Games and gives insight into the world record holder's training.