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 Fall Practices to Begin with Common Start Date, Return of Traditional Schedules & Formats
By
Geoff Kimmerly
MHSAA.com senior editor
August 6, 2021
Teams participating in all nine sports for which the Michigan High School Athletic Association sponsors postseason tournaments – featuring more than 100,000 student athletes statewide – will be allowed to begin practice Monday, Aug. 9, and with a return to traditional schedules and MHSAA Tournament formats after COVID-19 resulted in various adjustments for the Fall 2020 season.
Postseason competition in cross country, football, golf, tennis and swimming & diving will revert to their customary formats this season, with all fall sports scheduled based on their traditional calendars other than beginning practice with a common start date for the first time. At the time of this release, there are no COVID-19-related state-ordered restrictions regarding school sports, for either athletes or spectators, from either the MHSAA or the Michigan Department of Health & Human Services (MDHHS). County health departments and local school districts may institute restrictions for venues in their areas, and teams traveling to those schools and venues must follow local mandates.
For most of the MHSAA’s modern history, football teams had begun practice Monday of the first week of the preseason, followed by the rest of fall teams two days later. A 2019 rule change allowed a few more sports to begin on Monday, dependent on their Finals dates that fall. The common start date for all fall practices this season and annually moving forward was approved by the MHSAA Representative Council at its Spring Meeting in May and allows all teams to begin the 16th Monday before Thanksgiving.
Football teams still must have 12 days of preseason practice at all levels before their first game, over a period of 16 calendar days before the first kickoff, with the first varsity games this fall scheduled for Aug. 26 and the weekend of Aug. 27-28. Competition this fall may begin Aug. 16 for golf and tennis teams and Aug. 18 in cross country, soccer, volleyball and swimming & diving.
One of the most anticipated sport-related changes for Fall 2021 is the full implementation of the “enhanced strength-of-schedule” format for selecting the 256-team field for the 11-Player Football Playoffs. The new format eliminates automatic qualification based on win total and bases it solely on playoff-point average, which also is determined differently in that it now awards teams more for playing tougher schedules. (Click for a more detailed comparison of the previous and new formats.)
The new playoff-point formula was used in 2020 to seed teams at the District and Regional levels, but its use for qualification was put on hold as COVID-19 caused a one-season switch in playoff format that allowed all teams to qualify.
Additional rules changes in cross country, football, golf and tennis will be most noticeable this fall:
• Cross Country will provide an opportunity for more individual Finals qualifiers this season, as a minimum of seven individual qualifiers will advance from each Regional race. Previously, runners on teams that did not qualify as a whole could still advance to the Finals if they finished among the top 15 individuals at a Regional – but at some Regionals runners from the team qualifiers filled the great majority of those top 15 finishes. The seven individual qualifiers from each Regional this season will be the first seven finishers from teams that do not qualify as a whole, even if they finish outside of the top 15.
• Another football change continues the focus on minimizing injury risk, addressing blocking below the waist in the free-blocking zone (the rectangular area extending laterally four yards to either side of the snap and three behind the line of scrimmage). The new rule states a below-the-waist block in the free-blocking zone must occur as an immediate, initial action following the snap, instead of the previous rule which allowed an offensive lineman to delay and block below the waist as long as the ball was still in the zone.
• For Lower Peninsula girls golf, teams will be required to use the scoring platform iWanamaker also for the regular season, just as they were required to do so for MHSAA Tournament competition during the 2020-21 school year. The scoring platform is made available through the MHSAA Golf app, which was created and is operated by iWanamaker and allows golfers, coaches and fans to chart scoring in real time.
• In tennis, if a seeded player withdraws on the day of an MHSAA Regional or Final, all seeded players below that withdrawing player (including the provisional seed in that flight) will move up and be placed on the proper line for that new seed. (Non-seeded players drawn into the bracket will not be moved.)
The 2021 Fall campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls Tennis Finals during the final week of September and wraps up with the 11-Player Football Finals on Nov. 26 and 27. Here is a complete list of fall tournament dates:
Cross Country
U.P. Finals – Oct. 23
L.P. Regionals – Oct. 29 or 30
L.P. Finals – Nov. 6
11-Player Football
Selection Sunday – Oct. 24
Pre-Districts – Oct. 29 or 30
District Finals – Nov. 5 or 6
Regional Finals – Nov. 12 or 13
Semifinals – Nov. 20
Finals – Nov. 26-27
8-Player Football
Selection Sunday – Oct. 24
Regional Semifinals – Oct. 29 or 30
Regional Finals – Nov. 5 or 6
Semifinals – Nov. 13
Finals – Nov. 19 or 20
L.P. Girls Golf
Regionals – Oct. 4, 5, 6, 7, 8, or 9
Finals – Oct. 15-16
Soccer
Boys L.P. Districts – Oct. 13-23
Boys L.P. Regionals – Oct. 26-30
Boys L.P. Semifinals – Nov. 3 Boys
L.P. Finals – Nov. 6
L.P. Girls Swimming & Diving
Diving Regionals – Nov. 11
Swimming/Diving Finals – Nov. 19-20
Tennis
U.P. Girls Finals – Sept. 29, 30, Oct. 1, or 2
L.P. Boys Regionals – Oct. 6, 7, 8 or 9
L.P. Finals – Oct. 14-16
Girls Volleyball
Districts – Nov. 1-6
Regionals – Nov. 9 &11
Quarterfinals – Nov. 16
Semifinals – Nov. 18-19
Finals – Nov. 20
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 1.4 million spectators each year.