From a medical perspective, it is not unusual for someone to die unexpectedly from heart failure during activities far less strenuous than a marathon, said Ruan Jing, a cardiologist at Shanghai North Station Hospital.
"Heart problems are not difficult to identify during a checkup," she told the Global Times. "The problem is that young people may ignore minor heart problems that can lead to death during sports."
Ruan added that the ambulances and medical stations will help ensure that runners receive timely first aid if an emergency occurs during the race.
The 2012 Shanghai International Marathon has attracted 29,800 runners, including 5,000 foreign participants from 70 countries and regions, according to the Shanghai Municipal Sports Bureau's official microblog. The number is up 19 percent from last year.
The first-place male and female marathon runners will each receive a $45,000 prize. The race will start at 7 am December 2 from Chen Yi Square on the Bund.
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