Study: Single-Sport Athletes Injured More
November 3, 2016
A study conducted by the University of Wisconsin School of Medicine and Public Health and funded by the National Federation of State High School Associations (NFHS) Foundation revealed that high school athletes who specialize in a single sport sustain lower-extremity injuries at significantly higher rates than athletes who do not specialize in one sport.
The study was conducted throughout the 2015-16 school year at 29 high schools in Wisconsin involving more than 1,500 student-athletes equally divided between male and female participants. The schools involved in the study represented a mixture of rural (14), suburban (12) and urban (3) areas, and enrollments were equally diverse with 10 small schools (less than 500 students), 10 medium schools (501-1,000 students) and nine large schools (more than 1,000 students).
Athletes who specialized in one sport were twice as likely to report previously sustaining a lower-extremity injury while participating in sports (46%) than athletes who did not specialize (24%). In addition, specialized athletes sustained 60 percent more new lower-extremity injuries during the study than athletes who did not specialize. Lower-extremity injuries were defined as any acute, gradual, recurrent or repetitive-use injury to the lower musculoskeletal system.
“While we have long believed that sport specialization by high school athletes leads to an increased risk of overuse injury, this study confirms those beliefs about the potential risks of sport specialization,” said Bob Gardner, NFHS executive director. “Coaches, parents and student-athletes need to be aware of the injury risks involved with an overemphasis in a single sport.”
Among those who reported previously sustaining a lower-extremity injury, the areas of the body injured most often were the ankle (43%) and knee (23%). The most common types of previous injuries were ligament sprains (51%) and muscle/tendon strains (20%).
New injuries during the year-long study occurred most often to the ankle (34%), knee (25%) and upper leg (13%), with the most common injuries being ligament sprains (41%), muscle/tendon strains (25%) and tendonitis (20%).
In addition, specialized athletes were twice as likely to sustain a gradual onset/repetitive-use injury than athletes who did not specialize, and those who specialized were more likely to sustain an injury even when controlling for gender, grade, previous injury status and sport.
Thirty-four (34) percent of the student-athletes involved in the Wisconsin study specialized in one sport, with females (41%) more likely to specialize than males (28%). Soccer had the highest level of specialization for both males (45%) and females (49%). After soccer, the rate of specialization for females was highest for softball (45%), volleyball (43%) and basketball (37%). The top specialization sports for males after soccer were basketball (37%), tennis (33%) and wrestling (29%).
The study, which was directed by Timothy McGuine, Ph.D., ATC, of the University of Wisconsin, also documented the effects of concurrent sport participation (participating in an interscholastic sport while simultaneously participating in an out-of-school club sport), which indicated further risk of athletes sustaining lower-extremity injuries.
Almost 50 percent of the student-athletes involved in the survey indicated they participated on a club team outside the school setting, and 15 percent of those individuals did so while simultaneously competing in a different sport within the school. Seventeen (17) percent of the student-athletes indicated that they took part in 60 or more primary sport competitions (school and club) in a single year. Among those student-athletes in this group who sustained new lower-extremity injuries during the year, 27 percent were athletes who specialized in one sport.
The student-athletes involved in the study were deemed “specialized” if they answered “yes” to at least four of the following six questions: 1) Do you train more than 75 percent of the time in your primary sport?; 2) Do you train to improve skill and miss time with friends as a result?; 3) Have you quit another sport to focus on one sport?; 4) Do you consider your primary sport more important than your other sports?; 5) Do you regularly travel out of state for your primary sport?; 6) Do you train more than eight months a year in your primary sport?
Although some sports (field hockey, lacrosse) are not offered in Wisconsin and were not included in the study, the study concluded that since specialization increased the risk of lower-extremity injuries in sports involved in the survey it would also likely increase the risk of injuries in sports that were not a part of the study.
Winter Sees Season Switch, Rules Changes
November 26, 2018
By Geoff Kimmerly
Second Half editor
A switch in the starts of boys and girls basketball and a number of rules changes in various sports are notable as 2018-19 competition begins in 12 winter sports for which the MHSAA sponsors postseason tournaments.
Beginning with ice hockey’s first games Nov. 12, five sports have started play during these last two weeks, while wrestling on Dec. 5 and skiing on Dec. 8 will be the final winter sports to begin competition. This season’s first boys basketball games are scheduled to begin Nov. 26 as the boys season begins, and ends, one week before the girls basketball season this winter in a switch from years past. The change was made for this winter to accommodate availability of Michigan State University’s Breslin Student Events Center, which will host the Boys Basketball Finals. The first girls basketball games will be played Dec. 3, and the Girls Basketball Finals on March 16 at Calvin College’s Van Noord Arena will close the winter season.
The further re-definition of the competition area to reward offensive wrestling is among the most significant rules changes taking effect this winter. Following a similar rule change a year ago to create a larger scoring area coming out of the down position, wrestlers will continue to compete as long as two supporting point(s) – be it two for one wrestler or one for each – remain inbounds. This change will provide a larger scoring area for takedowns, escapes and reversals. Supporting points include the parts of the body touching, or within, the wrestling area that bear the wrestler’s weight, other than those parts with which the wrestler is holding the opponent.
Other rules changes that will be most apparent this winter include:
• In basketball, a rule change allows any player located in the backcourt, for either team, to recover a ball deflected from the frontcourt by the defense. This exception to the backcourt violation ensures neither team is unfairly disadvantaged on a deflected pass. A player located in the frontcourt still may not be the first to touch the ball if his or her team loses control and the ball goes into the backcourt.
• Also in basketball, the previous 14-foot coach’s box in front of a team's bench has been extended to 28 feet.
• As with Lower Peninsula girls swimming & diving season in the fall, a pair of changes for boys and Upper Peninsula girls will provide more opportunities for divers. The diving event in dual, double-dual or other multi-team non-championship competition has been limited to six dives, but now may be expanded to an 11-dive competition – giving divers another opportunity to prepare for the 11-dive competitions at the MHSAA Qualification Meets and Finals levels. Also, while diving traditionally has been placed in the middle of the event order of a dual or other regular-season meet, it may now be conducted first, last or simultaneously with the swimming events. (Both require prior mutual consent by competing teams and officials.)
• In boys ice hockey, a penalty shot will be awarded when a goal cage is displaced on a breakaway or during the last two minutes of regulation. This is meant to deter players and goalies from attempting to displace the net during a breakaway situation.
The 2018-19 Winter campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls and Boys Swimming & Diving Finals on Feb. 16, and wraps up with the Girls Basketball Finals on March 23. A reminder: The MHSAA Individual Wrestling Finals at Ford Field again will be a two-day event this winter as opposed to a three-day event as in past seasons.
Here is a complete list of winter tournament dates:
Boys Basketball
Districts – Feb. 25, 27 & March 1
Regionals – March 5 & 7
Quarterfinals – March 12
Semifinals – March 14-15
Finals – March 16
Girls Basketball
Districts – March 4, 6 & 8
Regionals – March 11 & 13
Quarterfinals – March 19
Semifinals – March 21-22
Finals – March 23
Girls & Boys Bowling
Team Regionals – Feb. 22
Singles Regionals – Feb. 23
Team Finals – March 1
Singles Finals – March 2
Girls Competitive Cheer
Districts – Feb. 15-16
Regionals – Feb. 23
Finals: March 1-2
Girls Gymnastics
Regionals – March 2
Team Finals – March 8
Individual Finals – March 9
Ice Hockey
Regionals – Feb. 25-March 2
Quarterfinals – March 5-6
Semifinals – March 7-8
Finals – March 9
Girls and Boys Skiing
Regionals – Feb. 11-15
Finals – Feb. 25
Girls & Boys Swimming & Diving
U.P. Girls & Boys Finals – Feb. 16
L.P. Boys Diving Qualification Meets – Feb. 28
L.P. Boys Finals – March 8-9
Wrestling
Team Districts – Feb. 6-7
Individual Districts – Feb. 9
Team Regionals – Feb. 13
Individual Regionals – Feb. 16
Team Quarterfinals – Feb. 22
Team Semifinals & Finals – Feb. 23
Individual Finals – March 1-2