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.
Clipping Clipped as 2016-17 Begins
August 5, 2016
By Geoff Kimmerly
Second Half editor
Clipping has been eliminated in high school football, the biggest playing rules change on the horizon for member schools of the Michigan High School Athletic Association, which formally begin practice for 2016-17 fall sports next week.
Practice in football must begin on Aug. 8 for all schools wishing to begin regular-season games the weekend of Aug. 25-27. Schools must have 12 days of preseason practice at all levels before their first game, and those 12 days of practice may not occur before 16 calendar days.
Practice sessions for all other sports begin Wednesday (Aug. 10). 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. 17. 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, tennis, soccer, swimming and diving, and volleyball is Aug. 19.
This fall, two football dates again precede Labor Day, and a number of MHSAA schools will play their first varsity games on Thursday, Aug. 25. In Week 1, 131 varsity games will be played on Thursday, 169 contests will be played on Friday, and 17 games will be played on Saturday. In the second week, 245 games will take place on Thursday, 62 will be played on Friday and 6 contests are on Saturday.
Eliminating clipping from the high school game is the latest step in the national playing rules promulgated by the National Federation of State High School Associations. Clipping previously was permitted in the free-blocking zone when it met three conditions; however, clipping is now illegal anywhere on the field at any time. According to the rule, the free-blocking zone is defined as a rectangular area extending laterally 4 yards either side of the spot of the snap and 3 yards behind each line of scrimmage.
A few notable changes will go into effect for other fall sports:
• In cross country, a participant who assists an injured or ill competitor when the appropriate health care professional is not available no longer will be disqualified from the race; only the runner receiving assistance will be disqualified for not finishing the race unassisted.
• In soccer, changes were made to the offside rule that makes it match offside rules for the NCAA and FIFA/USSF. The most notable change states that a player in an offside position receiving the ball from an opponent who deliberately plays the ball (except from a deliberate save) is not considered to have gained an advantage and can move ahead toward attempting to score a goal. A player who does receive the ball while in offside position after a deliberate save remains offside, and the result is an indirect kick for the defending team.
• Also in soccer, eliminating of rough play will be a point of emphasis this school year. Rough play including contact above the shoulder often results in player injury.
• In volleyball, a change to rules on uniforms aims to make the libero more recognizable from all angles. Beginning this fall, the libero, her teammates, or both will be required to wear a solid-colored uniform top; the libero’s top must clearly contract the predominant color(s) of her teammates’ uniform tops. Also related the uniforms, soft hair devices, formerly no more than two inches in width, may now be up to three inches in width.
• Also in volleyball, a service toss that contacts a basketball backboard or its supports in a vertical position over the serving area is a service fault and not eligible for a re-serve. The opponent receives a point and the next serve.
The 2016 Fall campaign culminates with postseason tournaments beginning with the Upper Peninsula Girls Tennis Finals the week of Sept. 26, and wraps up with the 11-Player Football Playoff 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 Oct. 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 Oct. 29
Regional Finals – Nov. 4 or 5
Semifinals – Nov. 12
Final – Nov. 18
L.P. Girls Golf:
Regionals – Oct. 5 or 6 or 7 or 8
Finals – Oct. 14-15
Soccer:
Boys L.P. Districts – Oct. 17-22
Boys L.P. Regionals – Oct. 25-29
Boys L.P. Semifinals – Nov. 2
Boys L.P. 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-Oct. 1
L.P. Boys Regionals – Oct. 6 or 7 or 8
L.P. Finals – Oct. 14-15
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.