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 Nearly 95,000 Athletes, Notable Rules Changes
By
Geoff Kimmerly
MHSAA.com senior editor
August 5, 2022
Nearly 95,000 athletes statewide are anticipated to begin practices Monday, Aug. 8, kicking off the Fall 2022 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. 15 for golf and tennis, Aug. 17 for cross country, soccer, swimming & diving and volleyball, and Aug. 25 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.
The beginning of a school year always is accompanied by at least a handful of notable playing rules changes or adjustments regarding MHSAA Tournament competition. Among the most noteworthy this fall will be the addition of a “third half” rule in soccer, which will allow an athlete to play in a combined three halves across two matches and multiple levels (varsity, junior varsity, freshman) on the same day, any day of the week. This is similar to the fifth-quarter rules in football and basketball approved in recent years to help programs with low athlete numbers still have enough to continue fielding teams at multiple levels – generally with underclassmen playing on multiple teams to keep rosters filled.
There is also an enhanced penalty beginning this fall for violating the fifth-quarter or third-half rules: Violators must forfeit the contest during which the violation took place (either varsity or subvarsity), and that head coach in violation will be ineligible for the next day of competition.
The change to a playing rule most likely to be noticed by spectators comes in football, where intentional grounding has been adjusted to allow for a passer to throw an incomplete forward pass to conserve yardage – in essence, to throw the ball away to avoid being tackled for a loss, even when a receiver isn’t present near the pass’s destination – if the passer is outside the free-blocking zone, or “pocket,” and as long as the pass reaches the line of scrimmage or extension of the neutral zone beyond the sideline. This change makes the high school intentional grounding rule mirror those at the collegiate and professional levels, and was made to conserve the amount of contact by defensive players with passers.
A second football rule change also was made with safety in mind, as the chop block – which is illegal – was redefined to include any combination block by multiple teammates against the same opponent where one of the blocks is above the waist and the other is below the waist. Previously, the knee (instead of the waist) was the determining factor on a chop block. This change also is expected to assist officials in enforcing the rule because deciding if blocks occur above and below the waist is more straightforward than using the knee to decide if an infraction occurred.
Another football rule change will be noticeable during the MHSAA 11-Player Finals, as head coaches for the first time will be allowed one challenge per game, with the play in question then reviewed with video replay. The challenge will cost that team a timeout if the original outcome is confirmed. Coaches will be allowed to challenge the following: complete/incomplete passes, if a runner/receiver was in/out of bounds, a runner who is ruled not down, the forward progress spot as it relates to the yard to gain, which player first touched a kick, the recovery of a ball in/out of bounds, if a pass was forward or backward, and penalties for illegal forward pass, targeting or illegal helmet contact, and pass interference only as it relates to the pass being previously tipped. All potential scores and turnovers will remain automatically reviewed by replay booth officials.
Three more notable rules changes for fall sports also affect MHSAA Tournament competition.
There is a new qualification process for divers seeking to advance to Lower Peninsula 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.
In golf, the maximum number of strokes allowed per hole during MHSAA Tournament play has been reduced from 12 to 10. Also, teams will be allowed two school-approved coaches to be present and actively coaching during postseason rounds.
In tennis, the number of players who may be seeded at No. 1 singles was increased to seven if there are between 21-23 players in the field, and eight if the field includes 24 or more players at that flight. The No. 1 singles flight is the only flight that allows for individual qualifiers from Regional play, often making it larger than the other seven flights at the Finals.
The 2022 Fall campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls Tennis Finals during the week of Sept. 26 and wraps 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. 22
L.P. Regionals – Oct. 28 or 29
L.P. Finals – Nov. 5
11-Player Football
Selection Sunday – Oct. 23
Pre-Districts – Oct. 28 or 29
District Finals – Nov. 4 or 5
Regional Finals – Nov. 11 or 12
Semifinals – Nov. 19
Finals – Nov. 25-26
8-Player Football
Selection Sunday – Oct. 23
Regional Semifinals – Oct. 28 or 29
Regional Finals – Nov. 4 or 5
Semifinals – Nov. 12
Finals – Nov. 18 or 19
L.P. Girls Golf
Regionals – Oct. 3, 4, 5, 6, 7 or 8
Finals – Oct. 14-15
Soccer
L.P. Boys Districts – Oct. 12-22
L.P. Boys Regionals – Oct. 25-29
L.P. Boys Semifinals – Nov. 2
L.P. Boys Finals – Nov. 5
L.P. Girls Swimming & Diving
Diving Regionals – Nov. 10
Swimming/Diving Finals – Nov. 18-19
Tennis
U.P. Girls Finals – Sept. 28, 29, 30 or Oct. 1
L.P. Boys Regionals – Oct. 5, 6, 7 or 8
L.P. Boys Finals – Oct. 13-15
Girls Volleyball
Districts – Oct. 31-Nov. 5
Regionals – Nov. 8 & 10
Quarterfinals – Nov. 15
Semifinals – Nov. 17-18
Finals – Nov. 19
The MHSAA is a private, not-for-profit corporation of voluntary membership by more than 1,400 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.