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: Winter 2015
April 1, 2015
By Geoff Kimmerly
Second Half editor
The selection of a new venue for its Team Wrestling Finals highlighted actions taken by the Representative Council of the Michigan High School Athletic Association during its annual Winter Meeting on March 27 in East Lansing.
The Team Wrestling Finals will be hosted by McGuirk Arena at Central Michigan University in Mount Pleasant for two years beginning with the 2016 tournament. The Team Wrestling Finals previously had been hosted by Kellogg Arena in Battle Creek since their inception in 1988.
McGuirk, formerly Rose Arena, is part of the CMU Events Center and reopened in 2010 after the facility underwent $22.5 million in renovations. McGuirk seats 4,867 fans for wrestling competitions, and the building also features adjacent practice areas that will be utilized by teams competing at the MHSAA Finals.
Rose Arena formerly served as host of the MHSAA Girls Basketball Finals from 1997-2003.
“We are grateful to the athletic directors, staff and volunteers whose time and energy factored heavily into creating and growing the Team Wrestling Finals at Kellogg Arena,” MHSAA Executive Director John E. “Jack” Roberts said. “The decision to move from Battle Creek was not an easy one. However, we believe Central Michigan University offers us a fantastic opportunity to continue growing one of our most popular championship events.”
The Representative Council also continued discussions on three issues which may require action at meetings later this calendar year.
Continuing its examination of athletics at the junior high/middle school level, the Council discussed recommendations submitted by the MHSAA’s Junior High/Middle School Committee, including one which may come up for vote at the Council’s May meeting. It is a request for a membership vote to amend the MHSAA Constitution to allow for school membership beginning at the 6th grade. If the Council approves, the amendment vote likely would occur in late October after another round of membership meetings.
The Council also continued its discussion of potential changes to out-of-season coaching rules and considered results of surveys taken during the MHSAA’s Update Meetings in the fall and by athletic directors and leaders of leagues and conferences during the late fall and winter. The major changes in rules that were proposed for discussion last summer have not gained traction with the MHSAA membership, but three modifications intended to give school coaches longer and more flexible contact with their student-athletes out of season during the school year will receive Council action in May.
Continuing its work regarding the eligibility of international students, the Council also approved that MHSAA staff continue reviewing school-operated international student programs for the purpose of granting students athletic eligibility at MHSAA schools. A proposal first approved at the March 2014 meeting granted the MHSAA authority to grant athletic eligibility to students placed through an Approved International Student Program that had not been accepted for listing by the Council on Standards for International Educational Travel (CSIET), so long as that Approved International Student Program is not eligible for CSIET consideration and listing. CSIET will only review existing programs, but the MHSAA’s supplemental process will allow programs too new for the CSIET process to gain approval for 2015-16.
Those international students placed through an Approved International Student Program are eligible for a maximum of the first two consecutive semesters or three consecutive trimesters at any secondary school in the United States, after which the student is ineligible for interscholastic athletic competition at any MHSAA member school for the next academic year. International students who do not meet one of the residency exceptions recognized by the MHSAA or are not enrolled through an Approved International Student Program or CSIET-listed program may become eligible after one semester to participate at the subvarsity level only.
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 1,400 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.