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SPORTS MEDICINE :
SPORTS: BASKETBALL :
ANKLES :
KNEES :
MEDICAL: CONDITIONS :
RESEARCH:
Low Range of Ankle Dorsiflexion Predisposes for Patellar Tendinopathy
in Junior Elite Basketball Players: A 1-Year Prospective Study
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Low Range of Ankle Dorsiflexion Predisposes for Patellar Tendinopathy
in Junior Elite Basketball Players: A 1-Year Prospective Study
http://ajs.sagepub.com/content/early/2011/09/14/0363546511420552.a
Ludvig J. Backman, MSc, BSc (PT)
([log in to unmask])
Department of Integrative Medical Biology, Anatomy, Umea University,
Ume Sweden
Patrik Danielson, MD, PhD
Department of Integrative Medical Biology, Anatomy, Umea University,
Ume Sweden
Abstract
Background:
Patellar tendinopathy (PT) is one of the most common reasons
for sport-induced pain of the knee. Low ankle dorsiflexion range might
predispose for PT because of load-bearing compensation in the patellar
tendon.
Purpose:
The purpose of this 1-year prospective study was to analyze if a
low ankle dorsiflexion range increases the risk of developing PT for
basketball players.
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snip
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Conclusion:
This study clearly shows that low ankle dorsiflexion range is
a risk factor for developing PT in basketball players. In the studied
material, an ankle dorsiflexion range of 36.5 was found to be the most
appropriate cutoff point for prognostic screening. This might be useful
information in identifying at-risk individuals in basketball teams and
enabling preventive actions. A history of ankle sprains might contribute
to reduced ankle dorsiflexion range.
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Stiff ankles tied to young athletes' painful knees
By Adam Marcus
New York | Fri Oct 7, 2011 1:14pm EDT
Reuters
http://www.reuters.com/article/2011/10/07/
us-stiff-ankles-idUSTRE7964V620111007
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A shorter URL for the above link:
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http://tinyurl.com/6zym4em
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New York (Reuters Health) - Young basketball and volleyball players'
chances of developing a painful condition called jumper's knee may hinge
on how far they can flex their ankles, say Swedish researchers.
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Teenagers at a junior elite basketball camp who were less able to flex
their feet upward at the start of the study had up to a 30 percent risk of
developing patellar tendinopathy -- pain below the kneecap -- over the
next year, compared to a two percent risk in young players with more
flexible ankles.
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The notion that ankle stiffness might lead to knee pain "makes perfect
sense" physiologically, said Dr. Rachel Coel, co-director of the sports
medicine program at Children's Hospital Colorado, in Aurora, who was not
involved in the study. "If we don't have the right flexibility, we are
changing the mechanics we're supposed to have," she told Reuters Health.
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Ludvig Backman and his colleagues at Umea University in Sweden, who
published the new findings in the American Journal of Sports Medicine,
conclude that identifying kids at risk at the beginning of a sports season
and giving them preventive stretching exercises could save many young
knees from damage.
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So-called jumper's knee is poorly understood, but believed to stem from
damage to the tendon connecting the kneecap to the shin. The condition is
most common in sports like volleyball and basketball, where jumping is a
frequent part of the play.
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The study included 75 Swedish junior elite basketball players, both girls
and boys, ages 14 to 20, who were attending a training camp. At the
outset, the researchers measured each player's range of dorsiflexion --
the ability to flex the foot toward the shin. Mobility in that direction
basically reflects the stiffness of calf muscles and Achilles tendons. A
year later, they evaluated the players for knee pain.
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A dozen athletes (16 percent) developed jumper's knee within the year;
eight were male and four were female, although the sex difference was not
statistically meaningful. Players who developed knee problems were found
to have about five degrees less ankle mobility than those who did not
experience the condition.
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The complete article may be read at the URL above.
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