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.
MHSAA Remembers Late Director Bush
September 11, 2013
By Geoff Kimmerly
Second Half editor
Allen W. Bush was a military man and had a military way about him.
And those traits no doubt were invaluable as the former U.S. Marine became a respected national voice during arguably the most transformative era in high school athletics.
Bush, who served as Executive Director the Michigan High School Athletic Association from the fall of 1968 through the summer of 1978, died Monday in Traverse City. He was 90.
Bush oversaw some of the most significant developments in MHSAA history, chiefly the addition of girls sports – MHSAA tournaments existed for nine girls sports when he retired – plus the addition of football playoffs in 1975 and MHSAA tournaments in baseball, ice hockey and skiing.
“He led the MHSAA during simultaneously one of the most stressful and most exciting times as schools responded to federal legislation promoting opportunities for minorities and females,” current MHSAA Executive Director John E. “Jack” Roberts said. “Al Bush was among leaders who saw the opportunities instead of burdens of those laws.”
He began his tenure at the MHSAA on March 1, 1960, as Assistant State Director of Athletics to Executive Director Charles E. Forsythe. Bush’s designation changed to Associate Director in 1963, and on July 10, 1968 he was appointed to replace the retiring Forsythe as leader of the association.
An award bearing Bush’s name is bestowed by the MHSAA each spring to an administrator, coach, official, trainer, doctor, or member of the media who has at least 15 years of experience in Michigan interscholastic athletics with unusually frequent and significant contributions to the MHSAA.
Prior to joining the MHSAA, Bush taught mathematics, coached four sports and served as athletic director at different times during tenures at Battle Creek Central, Kalamazoo University, Dearborn and Bay City Handy high schools. Bush was a graduate of Kalamazoo University and later earned multiple bachelor’s degrees from Western Michigan University and a master’s in school administration from the University of Michigan. He was captain of the football team at WMU and received its Most Valuable Player and Athletic-Scholarship awards as a senior, and later was named Man of the Year in 1975 by WMU’s Alumni W Club.
Bush also studied at Princeton University and the University of Arizona and served six years of active duty with the U.S. Marine Corps during World War II and the Korean War. He was discharged with a rank of first lieutenant.
While at the MHSAA, Bush was a frequent contributor to the National Federation of State High School Associations. He served as chairperson of the committee that wrote the NFHS’s first swimming and diving rule book and also was a representative to the U.S. Olympic Committee.
A memorial service will take place at 11 a.m. Friday, Sept. 13, at Central United Methodist Church in Traverse City.
A summation written by late MHSAA historian Dick Kishpaugh during 1978 said the following of Bush's service to member schools:
"Through all of these varied and complex changes, the MHSAA has met its commitment to a high standard of excellence," Kishpaugh wrote.
"Al Bush is fallible, as we all are, but he needs to make no apologies. The accomplishments speak for themselves."