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Study shows first link between altitude and concussion

RATE THIS! +9
Posted in Science on 10th Dec, 2013 12:25 AM by AlexMuller

A new study shows that high school athletes playing at higher altitudes suffer fewer concussions than those closer to sea-level, a phenomenon attributed to physiological changes in the brain causing it to fit more tightly in the skull.

 
"This is the first time any research has linked altitude to sports-related concussion," said Dawn Comstock, PhD, associate professor of epidemiology at the Colorado School of Public Health and co-author of the study. "It appears that when you are at altitude there may be a little less free space in the skull so the brain can't move around as much."
 
The study, first-authored by David Smith, MD, of Cincinnati Children's Hospital Medical Center, was published recently in the Orthopaedic Journal of Sports Medicine.
 
The researchers analyzed concussion statistics from athletes playing multiple sports in 497 high schools from across the U.S. with altitudes ranging from 7 feet to 6,903 feet with 600 feet being the median. They also examined football separately since it has the highest concussion rate of high school sports. The numbers came from the National High School Sports-Related Injury Surveillance System directed by Comstock.
 
The results showed a 31 percent decrease in concussion rates among all high school sports played at altitudes of 600 feet and above. Concussion rates for high school football players at these altitudes decreased by 30 percent.
 
"We did see significant differences in concussion rates with elevation changes," Comstock said. "This could mean that kids in Colorado are less likely to sustain a concussion playing sports than kids in Florida."
 
While reasons for these declines are unclear, the study suggests a possible explanation - as one ascends in altitude blood vessels in the brain undergo mild edema or swelling. This swelling along with other physiological changes cause the brain to fit more tightly in the skull so that it cannot move around as violently when struck. Sports-related concussions usually result from the brain colliding with the skull following a blow to the athlete.
 
"Vasogenic edema in the brain leads to increased extravascular water," the study says. "These two adaptations would also lead to a tighter packaging of the brain with increased blood cell content surrounding the brain."
 
Comstock said the next step may be to look at professional sports.
 
"If this study is correct, we should look to replicate our findings in the National Football League," Comstock said. "For example, if the Broncos play the Chargers in San Diego or the Dolphins in Miami they should experience more concussions than when they play here in Denver."

Tags: brainhealthskullathletesportsconcussionaltitude

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Comments

Author: Guest
Posted: 2013-12-10
+1
This is quite unexpected that altitudes and concussions are linked. However, these observations are preliminary and much wider studies and explanations are needed. Reply
Author: Guest
Posted: 2013-12-10
+0
This research seems to be prompted by the findings that such incidence of concussion among high school athletes has grown tremendously - something has to be done Reply


 

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