A study revealed that running less than 64 km per week prior to running marathon may lead to temporary heart muscle weakness and increased pressure in the lung arteries and such cardiac abnormalities may last even long after runners finish a marathon.
For more information on the study, you may click the following link:
http://www.steadyhealth.com/articles/Running_Can_Lead_To_Heart_Trouble_a505_f0.html
Over the past decade, the number of people participating in endurance sports has increased. The finding could serve as a warning for people who have never take part in such a long run to pay attention before they make decision to participate.
In 2002, heart disease statistics show that 696,947 people died of heart disease (51% were women). This was 29% of all U.S. deaths. In 2006, heart disease is projected to cost more than $258 billion, including health care services, medications, and lost productivity.
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