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.
Fall Sports Practices Begin Next Week
August 3, 2018
By Geoff Kimmerly
Special for Second Half
More than 100,000 student-athletes will begin practices next week in nine sports in which the Michigan High School Athletic Association sponsors postseason tournaments, signaling the beginning of the 2018-19 Fall sports season.
Practice in football may begin Aug. 6 for all schools wishing to begin regular-season games the weekend of Aug. 23-25. Schools 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.
Practice sessions for all other sports begin Wednesday (Aug. 8). In golf and tennis, competition may commence no earlier than after three separate days of team practice, and not before seven calendar days. The first day competition may take place in golf and tennis is Aug. 15. In all other fall sports, contests can take place after seven days of practice for the team and not before nine calendar days. The first day competition may take place in cross country, soccer, swimming & diving, and volleyball is Aug. 17.
This fall, two football game dates again precede Labor Day, and a number of MHSAA schools will play their first varsity games Thursday, Aug. 23. In Week 1, 146 varsity games will be played on Thursday, 152 contests will be played Friday, and 12 games will be played Saturday. During the second week, one game will be played Wednesday, 245 games will take place Thursday, 62 will be played Friday, and one contest is scheduled for Saturday.
For fall sports, perhaps the most discussed change will concern MHSAA Tournament classification in volleyball. For the first time, volleyball teams are classified in four equal divisions instead of the traditional Class A-B-C-D. Class no longer will be used to organize the postseason for any sport, including girls and boys basketball in the winter. All other sports previously had switched from classes to divisions.
While most fall sports face at least minor rules changes this season, a few of the most noticeable adjustments in fall sports will come in football, volleyball, boys soccer and girls swimming & diving.
• In an effort to improve football pace of play by reducing re-kicks after a free or scrimmage kick (generally kickoffs or punts, respectively), an option has been added allowing the receiving team to accept a penalty and tack on the awarded yardage to the spot where the kick or punt return ended. This option incentivizes the receiving team to forgo a re-kick, and joins three other options after a penalty on the kicking team. The receiving team also may continue to accept a penalty from the previous spot and have the kicking team re-kick; and on kickoffs that travel out of bounds, the receiving team may continue to accept the ball and begin possession 25 yards from where the kickoff occurred or decline the penalty and begin possession where the kick flew out of bounds.
• Additionally for football, players who fail to properly wear required equipment or are missing required equipment during a down shall be replaced for one down rather than incur a yardage penalty. Previously, a penalty was assessed for delay of game in this scenario. If a player’s proper or legal equipment has become improperly worn through use and prompt repair is possible and does not cause a delay in game, that repair may be made without the player being replaced for the next down.
• A change in volleyball will allow teams to substitute for an injured/ill player prior to a replay; previously a replay would take place with no changes on the floor after the point was originally contested.
• Also in volleyball, with an eye on risk minimization, teams will be allowed to warm-up between sets only in their playing area and may not hit volleyballs over the net into the opponents’ playing area.
• For soccer – both boys this fall and girls in the spring – teams may continue to play up to two multi-team events every season, but beginning this fall a multi-team event can include two full 80-minute games the same day and still be counted as only one of a team’s 18 regular-season contests. Teams also may continue to play multi-team events with 30-minute halves and no more than 180 minutes total in one day (for example, three games with 30-minute halves) and call it just one contest of the 18.
• Another significant soccer change will switch the home team to wearing the dark uniform and the away team to wearing the white uniform. The change was made to allow home teams to wear their school colors – it does not require teams to purchase new uniforms, but only switches which team wears dark and which wears white.
• Also for soccer, a change has been made to the penalty when a player is whistled for denying the other team an obvious goal-scoring opportunity. If a player, in the penalty area, commits an infraction while attempting to play the ball, and that infraction results in a penalty kick, that offending player will receive a yellow card – previously this would have been a red card. If the player is not attempting to play the ball when an infraction is called in the penalty area that results in a penalty kick, the offending player still will receive a red card along with the opposing team being awarded the penalty kick.
• In swimming & diving regular-season competition, a pair of changes will provide more opportunities for divers. The diving event in dual, double-dual or other multi-team non-championship competition has been limited to six dives, but now may be expanded to an 11-dive competition – giving divers another opportunity to prepare for the 11-dive competitions at the MHSAA Qualification Meets and Finals levels. Also, while diving traditionally has been placed in the middle of the event order of a dual or other regular-season meet, it may now be conducted first, last or simultaneously with the swimming events. (Both require prior mutual consent by competing teams and officials.)
• Also in swimming & diving, visible 16.4-yard (or 15-meter) marks must be made visible on both sides of the pool deck to assist swimmers during competition.
The 2018 Fall campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls Tennis Finals the week of Oct. 1 and wraps up with the 11-Player Football Playoff Finals on Nov. 23 and 24. Here is a complete list of fall tournament dates:
Cross Country
U.P. Finals – Oct. 20
L.P. Regionals – Oct. 26 or 27
L.P. Finals – Nov. 3
11-Player Football
Selection Sunday – Oct. 21
Pre-Districts – Oct. 26 or Oct. 27
District Finals – Nov. 2 or 3
Regional Finals – Nov. 9 or 10
Semifinals – Nov. 17
Finals – Nov. 23-24
8-Player Football
Selection Sunday – Oct. 21
Regional Semifinals – Oct. 26 or Oct. 27
Regional Finals – Nov. 2 or 3
Semifinals – Nov. 10
Finals – Nov. 17
L.P. Girls Golf
Regionals – Oct. 10 or 11 or 12 or 13
Finals – Oct. 19-20
Soccer
Boys L.P. Districts – Oct. 15-20
Boys L.P. Regionals – Oct. 23-27
Boys L.P. Semifinals – Oct. 31
Boys L.P. Finals – Nov. 3
L.P. Girls Swimming & Diving
Diving Regionals – Nov. 8
Swimming/Diving Finals – Nov. 16-17
Tennis
U.P. Girls Finals – Oct. 3 or 4 or 5 or 6
L.P. Boys Regionals – Oct. 11 or 12 or 13
L.P. Finals – Oct. 19-20
Girls Volleyball
Districts – Oct. 29-Nov. 3
Regionals – Nov. 6 & 8
Quarterfinals – Nov. 13
Semifinals – Nov. 15-16
Finals – Nov. 17
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.