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.
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MHSAA Winter Sports Start with Extended Basketball Schedules, New Wrestling Weights
By
Geoff Kimmerly
MHSAA.com senior editor
December 13, 2022
The addition of two games to basketball regular-season schedules and a new series of wrestling weight classes are likely the most noticeable Winter 2022-23 changes as an estimated 65,000 athletes statewide take part in 13 sports for which the Michigan High School Athletic Association sponsors postseason tournaments.
Girls gymnastics and boys ice hockey teams were able to begin practice Oct. 31, with the rest of those sports beginning in November – including also girls and boys basketball, girls and boys bowling, girls competitive cheer, girls and boys skiing, Upper Peninsula girls and boys and Lower Peninsula boys swimming & diving, and girls and boys wrestling.
A variety of changes are in effect for winter sports this season, including a several that will be noteworthy and noticeable to teams and spectators alike.
Basketball remains the most-participated winter sport for MHSAA member schools with 33,000 athletes taking part last season, and for the first time, basketball teams may play up to 22 regular-season games. This increase from the previous 20-game schedule allows more games for teams at every high school level – varsity, junior varsity and freshman.
Another significant change has been made in wrestling, as the majority of boys wrestling weight classes have been adjusted for this season in anticipation of a national change coming in 2023-24. The updated boys weight classes are 106, 113, 120, 126, 132, 138, 144, 150, 157, 165, 175, 190, 215 and 285 pounds. Only 215 and 285 remain from the previous lineup. There is also one change to girls weight classes, with the 255 class replaced by 235 to also align with national high school standards.
A series of notable changes will affect how competition takes place at the MHSAA Tournament levels. In hockey, in addition to a new classification process that spread cooperative and single-school programs evenly throughout the three playoff divisions, the MHSAA Tournament will employ two changes. The Michigan Power Ratings (MPR) will be used to seed the entire Regional round, not just the top two teams, and prior to the start of Semifinals, a seeding committee will reseed the remaining four teams in each division with the top seed in each then facing the No. 4 seed, and the No. 2 seed facing No. 3.
Bowling also will see an MHSAA Tournament change, as the Team Regional format will mirror the long-standing Team Final with teams playing eight Baker games and two regular games at both levels. And as also applied during the fall girls season, there is a new qualification process for divers seeking to advance to Lower Peninsula Boys Swimming & Diving Finals. In each of the three divisions, each Regional will be guaranteed 10 qualifiers for the Finals, with six more “floating” qualifier entries to be distributed to the Regionals that have one of the previous year’s top six returning Finals divers in their fields. If a team changes division from the previous season, any floating top-six spots are added to the six already allowed in the school’s new division.
A gymnastics rules change provides an opportunity for additional scoring during the floor exercise. A dance passage requirement was added in place of the former dance series requirement to encourage creativity and a more artistic use of dance. The dance passage requires gymnasts to include two Group 1 elements – one a leap with legs in cross or side split position, the other a superior element.
In competitive cheer, the penalty for going over the time limit in each round was adjusted to one penalty point for every second over the time limit, not to exceed 15 points. The new time limit rule is more lenient than the past penalty, which subtracted points based on ranges of time over the limit.
The 2022-23 Winter campaign culminates with postseason tournaments, as the championship schedule begins with the Upper Peninsula Girls & Boys Swimming & Diving Finals on Feb. 18 and wraps up with the Boys Basketball Finals on March 25. Here is a complete list of winter tournament dates:
Boys Basketball
Districts – March 6, 8, 10
Regionals – March 13, 15
Quarterfinals – March 21
Semifinals – March 23-24
Finals – March 25
Girls Basketball
Districts – Feb. 27, March 1, 3
Regionals – March 7, 9
Quarterfinals – March 14
Semifinals – March 16-17
Finals – March 18
Bowling
Regionals – Feb. 24-25
Finals – March 3-4
Competitive Cheer
District – Feb. 17-18
Regionals – Feb. 25
Finals – March 2-3
Gymnastics
Regionals – March 4
Finals – March 10-11
Ice Hockey
Regionals – Feb. 20-March 1
Quarterfinals – March 4
Semifinals – March 9-10
Finals – March 11
Skiing
Regionals – Feb. 13-17
Finals – Feb. 27
Swimming & Diving
Upper Peninsula Girls/Boys Finals – Feb. 18
Lower Peninsula Boys Diving Regionals – March 2
Lower Peninsula Boys Finals – March 10-11
Wrestling – Team
Districts – Feb. 8-9
Regionals – Feb. 15
Finals – Feb. 24-25
Wrestling – Individual
Districts – Feb. 11
Regionals – Feb. 18
Finals – March 3-4
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.