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.
Representative Council Approves Limited Regional Seeding in Girls Lacrosse at Fall Meeting
By
Geoff Kimmerly
MHSAA.com senior editor
December 9, 2022
The addition of limited seeding at the Regional level of the Girls Lacrosse Tournament headlined actions taken by the Representative Council of the Michigan High School Athletic Association during its Fall Meeting on Dec. 2 in East Lansing.
Generally, the Council takes only a few actions during its Fall Meeting, with topics often introduced for additional consideration and action during its meetings in winter and spring. This Fall Meeting saw the Council take only three actions, with additional discussion centered on topics expected to receive more specific consideration at MHSAA sport committee meetings this winter and the Council’s meetings in March and May.
The Council approved a Girls Lacrosse Committee proposal to seed the top two teams in every Regional, and place those top seeds on opposite sides of the bracket beginning with the 2023 season. The two teams to be seeded will be determined by using the MHSAA’s Michigan Power Ratings (MPR) formula, which takes into account success and strength of schedule and is used currently to provide seeding information in boys lacrosse, girls and boys basketball, girls and boys soccer, and ice hockey. Only the top two teams in girls lacrosse will be seeded and separated; the other teams in each Regional will be placed on their brackets by random draw.
The Council also approved a Boys Lacrosse Committee recommendation that will allow athletes to participate in up to five quarters per day between teams at multiple levels – for example, varsity and junior varsity – also beginning with the 2023 season. For boys lacrosse multi-team tournaments, if two school teams (for example, the varsity and junior varsity) are at the same event, athletes may play in no more halves or quarters than what is being played by the school’s highest-level team that day. (Example: if the varsity team is playing three 30-minute half games for a total of six halves, a player playing both varsity and JV on the same day can play in six total halves that day.) The “fifth quarter” rule, by allowing athletes to compete on two levels on the same day, is intended to help programs that are otherwise lacking enough participants to field teams at multiple levels.
Taking into account the wintery weather conditions experienced by athletes during the MHSAA alpine ski season, the Council approved a Sports Medicine Advisory Committee recommendation to adopt the “MHSAA Competition and Practice Guidelines for Cold Weather,” which are specific to alpine skiing. The guidelines include a windchill chart and cold standards for ambient temperature. This proposal also was supported by the Ski Committee and will go into effect for the 2022-23 season.
Remaining discussions focused on results from this fall’s Update Meeting survey completed by administrators during the MHSAA’s annual presentations across the state. The Council considered survey data including on questions related to the out-of-season travel rule. The Council also discussed results of a fall survey completed by member school athletic directors and head varsity football coaches concerning ongoing conversations about scheduling and playoff format. Following the Football Committee meeting in January 2023, an ad hoc committee comprised of members of the MHSAA staff, Representative Council, Michigan Interscholastic Athletic Administrators Association (MIAAA) and Michigan High School Football Coaches Association (MHSFCA) will be convened for further discussion on these topics, with their report to be provided to the Council during its March 2023 meeting.
The Fall Meeting saw the appointment of Westland John Glenn athletic director Jason Malloy for a first-two-year term to the 19-person Council, and the re-appointment of Bay City Western principal Judy Cox for a second two-year term. Malloy previously was appointed to finish a partial term as one of the two representatives of member junior high/middle schools.
The Council reelected Scott Grimes, superintendent for Grand Haven Area Public Schools, as its president; and Vic Michaels, director of physical education and athletics for the Archdiocese of Detroit, as secretary-treasurer. Brighton High School athletic director John Thompson was elected Council vice president.
The Representative Council is the legislative body of the MHSAA. All but five members 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 1,500 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 1.3 million spectators each year.