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.
Postseason, Playing Rules Modifications Taking Effect as Fall Practices Begin
By
Geoff Kimmerly
MHSAA.com senior editor
August 4, 2023
A series of changes, including adjustments to postseason qualification in multiple sports and several playing rules, will take effect Monday, Aug. 7, as more than 95,000 athletes statewide are anticipated to begin the Fall 2023 season across nine sports for which the Michigan High School Athletic Association sponsors postseason tournaments.
Teams in girls and boys cross country, football, Lower Peninsula girls golf, boys soccer, Lower Peninsula girls swimming & diving, Upper Peninsula girls tennis and Lower Peninsula boys tennis, and girls volleyball may begin practice Monday. Competition begins Aug. 14 for golf and tennis, Aug. 16 for cross country, soccer, swimming & diving and volleyball, and Aug. 24 for varsity football. Football teams at all levels must have 12 days of preseason practice – over a period of 16 calendar days – before their first game.
Qualification requirements for MHSAA Finals competition have been adjusted to provide more opportunities in two sports.
The Swimming & Diving Finals could enjoy larger fields this fall thanks to a change in the structuring of qualifying times. Moving forward, qualifying times will be determined based on the past five years of MHSAA race data, but also will account for past numbers of qualifiers in each swim race. This shift will allow for more athletes to advance to the Finals in events where fields have not been full over the previous five seasons.
In tennis, for the first time in Lower Peninsula play, a No. 1 doubles flight from a non-qualifying team will be able to advance from its Regional to Finals competition. To do so, that No. 1 doubles flight must finish first or second at its Regional, and the No. 1 singles player from that team also must have qualified for the Finals individually by finishing first or second in Regional play.
Also affecting MHSAA Tournament play, golfers now are required to participate in at least four competitions for the high school team prior to representing that school team in an MHSAA Regional or Final. Those four regular-season competitions may be 9 or 18-hole events.
A pair of significant changes have switched up the Finals schedules this fall in boys soccer and football. Instead of playing at multiple sites as in the past, all four Boys Soccer Finals will be played on the same day at the same site, Nov. 4 at Grand Ledge High School beginning with Division 4 and ending with Division 1.
The 11-Player Football Finals will start and finish a day later at Ford Field, concluding that sport’s season Saturday, Nov. 25 and Sunday, Nov. 26, instead of with the traditional Friday/Saturday schedule. This one-year adjustment is being made to accommodate the Michigan State/Penn State football game Friday, Nov. 24, at Ford Field.
Opportunities have been created as well beginning this fall for scheduling more out-of-state opponents in all sports, as teams are now able to play opponents from anywhere in the United States as long as those competitions are played in Michigan, contiguous states Illinois, Indiana, Ohio, Minnesota or Wisconsin, or Ontario. All out-of-state opponents must be members in good standing of their respective high school athletic association, and any multi-team event including schools from outside of Michigan or those contiguous states/province must receive approval by the MHSAA and each state high school association with a team involved in order for MHSAA member schools to be allowed to participate.
Rules changes will be literally visible in two sports as more flexibility will be allowed by new wardrobe exceptions in cross country and girls volleyball. In volleyball, small, secured studs or posts now may be worn above the chin. In cross country, athletes may now wear temporary body adornment (painted or fastened) during competition, and runners also may now wear any type of head attire during racing.
As is annually true, a series of playing rule changes also take effect with the new season. The following are among the most notable:
- The most significant in football changes how the ball is spotted after penalties by the offense that occur behind the line of scrimmage. Previously, those were marked from the spot of the foul; now those penalties will be marked from the previous spot – the line of scrimmage where that play began. This change was made to eliminate excessive penalties on the offense when an infraction took place well behind the line of scrimmage.
- In volleyball, teams will stay on the same bench for the duration of a match unless officials determine a clear disadvantage exists for the bench on one side of the court. In that case, teams will exchange sides of the court after each set.
- Another pair of changes affect where volleyball coaches may be positioned during matches. Coaches may stand in a new coaching zone, now defined by the libero replacement zone extending beyond the end line and sideline extended. During dead-ball situations, one assistant coach also may stand within the coaching zone to provide instruction; only one assistant coach can stand at a time, but the assistant coach who stands may change throughout the match.
- Two officiating-related changes will be especially noticeable on the soccer pitch. Officials now may stop the clock to check on an injured player without that player being required to leave the match – previously that player would have to sub out. Also, categories for fouls have been redefined: careless (which is a foul but does not receive a card), reckless (a foul with a yellow card) and excessive force (foul with red card).
- In swimming, stroke modifications were made in the backstroke and breaststroke events.
The 2023 Fall campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls Tennis Finals during the week of Oct. 2 and wrapping up with the 11-Player Football Finals on Nov. 25 and 26. Here is a complete list of fall tournament dates:
Cross Country
U.P. Finals – Oct. 21
L.P. Regionals – Oct. 27 or 28
L.P. Finals – Nov. 4
11-Player Football
Selection Sunday – Oct. 22
Pre-Districts – Oct. 27 or 28
District Finals – Nov. 3 or 4
Regional Finals – Nov. 10 or 11
Semifinals – Nov. 18
Finals – Nov. 25-26
8-Player Football
Selection Sunday – Oct. 22
Regional Semifinals – Oct. 27 or 28
Regional Finals – Nov. 3 or 4
Semifinals – Nov. 11
Finals – Nov. 18
L.P. Girls Golf
Regionals – Oct. 9, 10, 11, 12, 13 or 14
Finals – Oct. 20-21
Soccer
L.P. Boys Districts – Oct. 11-21
L.P. Boys Regionals – Oct. 24-28
L.P. Boys Semifinals – Nov. 1
L.P. Boys Finals – Nov. 4
L.P. Girls Swimming & Diving
Diving Regionals – Nov. 9
Swimming/Diving Finals – Nov. 17-18
Tennis
U.P. Girls Finals – Oct. 4, 5, 6 or 7
L.P. Boys Regionals – Oct. 11, 12, 13 or 14
L.P. Boys Finals – Oct. 20-21
Girls Volleyball
Districts – Oct. 30-Nov. 4
Regionals – Nov. 7 & 9
Quarterfinals – Nov. 14
Semifinals – Nov. 16-17
Finals – Nov. 18
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.