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.
Rep Council Wrap-Up: Spring 2017
May 18, 2017
By Geoff Kimmerly
Second Half editor
The adoption of a change in how basketball and volleyball teams will be classified for Michigan High School Athletic Association tournaments was among notable actions taken by the Representative Council during its annual Spring Meeting, May 7-8, in Glen Arbor, in addition to MHSAA Finals site changes announced in a previous release May 9.
The Spring Meeting of the 19-member legislative body of the Association’s more than 1,400 member schools is generally the busiest of its three sessions each year. The Council considered 29 committee proposals and dealt with a variety of eligibility rule, postseason tournament and operational issues.
The tournaments in girls and boys basketball, and volleyball – the last to be organized based on traditional Class (A-B-C-D) enrollment breaks – instead will be conducted using equal divisions (1-2-3-4) beginning with the 2018-19 school year. The Council approved this change in response to a proposal by the Basketball Coaches Association of Michigan; Michigan’s interscholastic volleyball community also has expressed openness to equal divisions in the past. All other MHSAA tournaments, except for football, are conducted using equal divisions based on enrollment and determined prior to the school year. Football is the only sport requiring teams to qualify for postseason play, and its equal divisions are not determined until after the regular season ends.
After previously approving the addition of a second division to the 8-Player Football Playoffs for 2017-18 at its Winter Meeting, the Council approved the selection of the field after the ninth week of the regular season and based on playoff point average. The 32 teams with highest playoff point averages will be listed by enrollment, with the largest 16 placed in Division 1 and the smallest 16 in Division 2 of the 8-Player tournament.
Also concerning tournament setup, the Council chose to not adopt a Basketball Committee proposal that would have seeded both the girls and boys tournaments at the District and Regional levels. Instead, the Council instructed staff to examine seeding options for the District level only, to be presented at Council meetings during the 2017-18 school year.
Continuing a focus on athletes’ health and safety, and in the case of football reducing the number of collisions experienced by players, the Council approved a Football Committee recommendation that, after the first game of the regular season, limits teams to no more than 90 total minutes of collision practice in any week. Similar to the previous rule limiting teams to two days of collision contact per week after the first game, blocking and tackling techniques are allowed by the new rule – but full-speed contact is limited to players versus pads, shields, sleds or dummies. Players may continue to wear helmets and other protective pads for non-collision practice sessions.
Here is a summary of other actions taken by the Representative Council at the Spring Meeting, which will take effect during the 2017-18 school year unless noted:
Sport Matters
• In competitive cheer, the Council approved a committee recommendation to allow forward/backward suspended rolls, in a double-braced pyramid, to be transitioned directly to a stunt. Those rolls are allowed to a cradle, sponge or stunt, but not the cheering surface.
• In football, the Council approved two recommendations, one by committee and one by staff, regarding the later rounds of the playoffs. For Semifinals and Finals, the home team and visitor will be determined by playoff point average instead of the previous Regional advancement. In addition, the Council also voted to allow 11-player Semifinals to be played either Friday night or Saturday, as opposed to only on Saturday.
• In golf, the Council approved a committee recommendation requiring a Golf Association of Michigan (GAM) rules official be present at each Lower Peninsula girls and boys Regional tournament to assist with rules issues and challenges.
• For hockey, the Council approved a recommendation that allows a 23rd active player to be dressed in uniform if that player is a goaltender. Previously, only 22 active players could dress and sit on the bench.
• Also for hockey, the Council approved a committee recommendation to add an MHSAA adaptation to a National Federation rule mandating helmets be worn by players and officials at all times on the ice, except while standing for the national anthem. The MHSAA adaptation adds postgame award ceremonies as another exception allowing helmets to be removed.
• In lacrosse, both boys and girls, the Council approved a recommendation from both sports’ committees to allow for multi-team tournaments on days not followed by school days (generally Fridays); currently they are allowed only on non-school days.
• In soccer, a committee recommendation was adopted eliminating overtime periods and shootouts during the regular season. Leagues and conferences will be allowed an overtime option for their end-of-season bracketed tournaments, but overtime in those cases must not exceed two 10-minute periods plus a shootout. Multi-team regular-season tournaments also may receive waivers to employ a shootout if it is used to determine the winner of a game.
• A swimming & diving committee recommendation was approved that reduces the number of regular-season wins required by a diver from five to four for that diver to qualify for the Diving Qualification Meet. A diver also may qualify for the Diving Qualification Meet if he or she places ahead of all divers from opposing schools in varsity competition in at least four meets, even if he or she does not finish ahead of his or her teammates.
• In tennis, the Council approved to adjust the limited team membership rule as it applies to tennis to go into effect on the first allowable date of competition for any student, as opposed to the current first day of allowable practice.
• In girls volleyball, a committee recommendation was approved allowing graduating 12th-grade athletes with no remaining interscholastic eligibility in any sport to wear school uniforms in one all-star game sponsored and conducted during the summer by the Michigan Interscholastic Volleyball Coaches Association, effective immediately.
• The Council approved two Wrestling Committee recommendations. The first changes the Team Regional hosting format so that a host will be selected from the four qualifying teams based on a yearly rotation among those Districts.
• The Council also approved a recommendation to revise the Weigh-In Form/Process to include a section for inspection, where all participating wrestlers would be subject to inspection by officials.
Junior High/Middle Schools
• The Council approved a Junior High/Middle School Committee recommendation urging each MHSAA sport committee to consider opportunities to add more games and dates to middle school schedules while not extending the length of the 13-week season for those sports. This likely would include expanding the number of multi-game events (all games played on the same day and on a day not followed by a day of school) from two to four events.
• For both girls and boys junior high/middle school lacrosse, the Council approved committee recommendations to increase the number of multi-team tournaments allowed. Both will be allowed four multi-team tournaments. One-day multi-team tournaments in both boys and girls lacrosse will be counted as one competition date. Also approved for boys junior high/middle school lacrosse were committee proposals upping the number of maximum game dates from 12 to 15 over the same 13-week season, and an increase in running time minutes during multi-team events from 150 to 160 minutes to allow for four games with 20-minute running-time halves.
The Council also reviewed reports on membership, with 750 senior high schools and 740 junior high/middle schools in 2016-17 plus 24 elementary schools with 6th-grader participation; eligibility advancement applications, which totaled five for the second straight school year; the use of Educational Transfer Forms, which fell 13 percent this year; school violations, attendance at athletic director in-service workshops and Coaches Advancement Program sessions, officials’ registrations, rules meetings attendance and officials reports submitted for the past three sports seasons. The Association’s $11.1 million budget for the 2017-18 school year also was approved.
The Representative Council is the 19-member legislative body of the MHSAA. All but five are elected by member schools. Four members are appointed by the Council to facilitate representation of females and minorities, and the 19th position is occupied by the Superintendent of Public Instruction or designee.
The MHSAA is a private, not-for-profit corporation of voluntary membership by more than 1,400 public and private senior high schools and junior high/middle schools which exists to develop common rules for athletic eligibility and competition. No government funds or tax dollars support the MHSAA, which was the first such association nationally to not accept membership dues or tournament entry fees from schools. Member schools which enforce these rules are permitted to participate in MHSAA tournaments, which attract more than 1.4 million spectators each year.