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SPORTS: MEDICINE :
MEDICAL: HEART :
SPORTS: RUNNERS AND RUNNING:
As New York City Marathon Approaches, Readers Ask Why Runners Collapse
at a Certain Point in the Race
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As New York City Marathon Approaches, Readers Ask Why Runners Collapse
at a Certain Point in the Race
Readers ask why marathon runners suddenly collapse
NEW YORK DAILY NEWS
Tuesday, November 1 2011, 12:51 PM
http://www.nydailynews.com/sports/more-sports/york-
city-marathon-approaches-readers-runners-collapse-
a-point-race-article-1.970440
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A shorter URL for the above link:
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http://tinyurl.com/3o8q4l9
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The prevailing theory about sudden death (fatal cardiac arrhythmia) in
healthy patients in an endurance event, as we have discussed here before,
is that either a caffeine load of more than 200 mg has caused enough
decreased blood flow to disrupt an ischemic areas electrical rhythm, or
the release of muscle byproducts has caused a small plaque to activate
platelets and a small clot to form in a coronary artery. Either of these
things can cause a fatal arrhythmia. Limiting caffeine and taking a baby
aspirin should help eliminate these possibilities.
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The X-spot is where a runner knows he (or she) is going to finish the
race, or where he can see the finish line and push to a hard sprint
finish. This adrenaline rush, we think, might push the electrical system
of the heart to an arrhythmia if the muscle is ischemic by one of the two
mechanisms described above or if the participant has underlying heart
disease. Not pushing yourself that last mile and taking it as you have the
last few miles might make participating safer. So would encouraging
announcers not to goad runners by saying things like, "If you can hear my
voice you can break 4 hours!"
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snip
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In the meantime, as I've said repeatedly, we continue to advise the
following on race day:
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1. Take a baby aspirin (81mg) the morning of the event.
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2. Limit caffeine that morning to less than 200 mg.
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3. Take the last mile like the previous without a fast sprint.
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The complete article may be read at the URL above.
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Sincerely,
David Dillard
Temple University
(215) 204 - 4584
[log in to unmask]
http://daviddillard.businesscard2.com
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