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 And water polo players in offensive positions take relatively more
hits to the head than their more defensive peers, the research
showed.
Head injuries in sports, particularly in American football, have
gained national attention as sport associations look to improve game
safety rules and avoid concussions.
"A lot of the focus has been on American Football, but this study
shows that in other sports like water polo, repeated hits to the
head can be frequent - possibly more frequent than we thought or
knew about," said Michael Alosco, assistant professor of neurology
at Boston University, who wasn't involved in the study.
The data is scant when it comes to water polo, said senior study
author James Hicks from the University of California, Irvine.
In an earlier study, Hicks and colleagues surveyed water polo
players and found that roughly one in three said they had gotten a
concussion during a game.
For the new study, conducted over three seasons of collegiate water
polo, Division 1 NCAA men's water polo players wore water polo caps
instrumented with head impact sensors.
The headgear recorded 85 impacts in 2015, including data from 12
field players and two goalies across seven games. There were 84
impacts from 12 games in 2016, with data recorded from 14 players
and one goalie. Finally, in 2017, 255 impacts were recorded, with
data from 22 players and three goalies across 12 games.
Field players took 246 hits while in offensive positions, compared
with 93 hits while defending and 72 when the players were
transitioning from defense to offense or vice versa.
Players in the "center" zone, which is centrally located and
directly in front of the goal, had the highest rate of head impacts,
compared with players on other sides of the field.
Both defensive and offensive players in this center zone were
equally at risk.
Magnitude of the head impact did not differ between different
scenarios or across positions, however.
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Also, none of the athletes were diagnosed with a concussion during
monitoring.
"The issue with the sport in terms of the incident rate of
concussion is that record-keeping is not as diligent as it is in
American football or other sports, particularly at the collegiate
level," Hicks said.
Until the injury information is systematically recorded, Hicks said
it would be hard to get a good look into the number of head injuries
in the sport.
USA Water Polo, the U.S. governing body for the sport, declined to
comment on incidence rates of concussions, while the NCAA did not
immediately respond to a request for comment.
It is possible that safety could be improved by a water polo cap
capable of reducing the impact of head impacts, Hicks and coauthors
write in the journal PLoS One. Currently, water polo athletes wear
caps with a guard on both sides to protect the ears.
"People have asked me in the past - is getting hit in the head even
an issue in water polo? What I like to remind people of is, look at
the water polo caps in the 1950s. There is no protective ear guards
on the caps," Hicks said.
Ear guards were added only because players were losing hearing or
sustaining ear drum damage when water was forced into their ear
canals after head impacts, Hicks added.
"Part of the value of this study and future studies ... is that they
will actually provide a database to inform the people that organize
this sport to think about whether or not there should be a rule
change," he added.
SOURCE: http://bit.ly/2XfbdPK PLoS ONE, online May 2, 2019.
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