But experts generally advise against using the drug if more than three hours have passed after the first signs of a stroke.

VOA: special.2009.09.22

The dismissal seemed to unnerve Clarke and he was out shortly after when he played a loose stroke against Steyn and was caught behind, just before tea.

BBC: Australia recover from poor start

Other studies have shown exercise protects against stroke, but some have questioned the connection.

CNN: Study: Exercise cuts stroke risk by almost half

Chocolate might not be the healthiest thing for your waistline - but research suggests it may protect against stroke.

BBC: Chocolate may protect the brain from stroke