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.
Participation Stays Above Enrollment Dip
July 13, 2017
By Geoff Kimmerly
Second Half editor
Enrollment in Michigan High School Athletic Association member high schools continued a trend of slight declines in 2016-17, but participation in sports held firm as records were set in three of the 28 sports for which postseason tournaments are sponsored by the MHSAA.
A total of 283,625 participants competed in MHSAA-sponsored sports this past school year, down 0.21 percent from 2015-16. However, this year’s decrease falls in line with a decrease in enrollment at member schools of 0.40 percent. The overall MHSAA participation totals count students once for each sport in which they participate, meaning students who are multiple-sport athletes are counted more than once.
Despite a drop in girls enrollment of 0.60 percent in 2016-17, girls participation increased for the second straight school year to 119,937 participants, an increase of 0.55 percent. Boys overall participation fell 0.76 percent to 163,688 participants, slightly sharper than the drop in boys enrollment of 0.21 percent for the school year. However, eight girls sports and eight boys sports saw increases in participation in 2016-17.
Boys and girls lacrosse continued their record-setting climb, boys lacrosse with 5,114 participants to increase 3.3 percent from 2015-16 and break its record set in 2013-14. Girls lacrosse saw 2,814 participants, an increase of 1.4 percent from the previous year, to continue its streak of setting a participation record every season since becoming a sponsored tournament sport in 2005. Boys cross country also set a record for the second straight season, this time with an increase of 1.7 percent to 9,415 participants total.
Good news also came from girls basketball, which ended a string of 10 straight declines in participation with an increase of 2.2 percent in 2016-17 – those 15,896 participants were the most in the sport since 2013-14. The largest percentage increases by far in 2016-17 were seen in boys and girls skiing, which were up 16.4 and 14.4 percent, respectively, with 837 boys participants and 746 girls after both experienced decreases in participation the school year before.
A number of other sports also saw increases on both the boys and girls’ sides: swimming & diving saw a 5.2 percent increase for boys and 4.1 increase for girls, track & field saw a 2.4 percent increase for girls and 1.9 percent increase for boys, girls cross country joined its boys counterpart with a 1.0 percent increase in participation, and tennis saw a 2.8 percent increase for girls and 0.48 increase for boys. That boys tennis increase ended a string of seven straight years of declining participation.
Other sports to see increases in 2016-17 were girls golf, increasing for the second straight season, this time 2.9 percent to 3,561 participants; boys ice hockey, up 1.8 percent to 3,411 participants; and boys soccer up 0.38 percent to 14,630 participants.
Also of note in this year’s survey:
• The increase in participation for 16 sports during 2016-17 was compared to an increase in 15 sports for 2015-16 and only eight sports in 2014-15.
• After a significant slowing in participation decline in football over the previous three years, 2016-17 saw a decline of 4.6 percent, or 1,805 participants from 2015-16. The number of school-sponsored football programs remained consistent over the last two years – there were 642 in 2015-16 and 640 in 2016-17 (up from 630 in 2014-15). But there was a shift of programs from 11-player to 8-player; there were 15 fewer 11-player programs in 2016-17 than the year before, but 13 more 8-player programs.
• Of the 12 MHSAA sports that saw participation declines in 2016-17, three were by mere hundredths of a percent. Boys wrestling saw a decline of three participants total, girls gymnastics had two fewer participants and boys golf participation decreased by one person.
The participation figures are gathered annually from MHSAA member schools to submit to the National Federation of State High School Associations for compiling of its national participation survey. Results of Michigan surveys from the 2000-01 school year to present may be viewed by clicking here.
The following chart shows participation figures for the 2016-17 school year from MHSAA member schools for sports in which the Association sponsors a postseason tournament:
|
BOYS |
GIRLS |
|||
SPORT |
SCHOOLS (A) |
PARTICIPANTS |
SCHOOLS (A) |
PARTICIPANTS (B) |
|
Baseball |
635/656/6 |
17,989 |
- |
0/9 |
|
Basketball |
722/735/1 |
21,263 |
690/725 |
15,896/4 |
|
Bowling |
363/381/10 |
3,792 |
341/369 |
2,926/24 |
|
Competitive Cheer |
- |
- |
334/349 |
6,720 |
|
Cross Country |
618/649/0 |
9,415 |
609/646 |
8,489 |
|
Football - 11 player |
580/592/87 |
36,460 |
- |
0/111 |
|
- 8-player |
60/61/11 |
1,130 |
- |
14 |
|
Golf |
496/526/59 |
6,170 |
329/342 |
3,561/100 |
|
Gymnastics |
- |
- |
72/88 |
636 |
|
Ice Hockey |
233/257/14 |
3,397 |
|
0/14 |
|
Lacrosse |
147/153/3 |
5,110 |
107/107 |
2,814/4 |
|
Skiing |
92/102/3 |
830 |
89/103 |
746/7 |
|
Soccer |
481/499/23 |
14,541 |
459/483 |
13,212/89 |
|
Softball |
- |
- |
616/646 |
13,641 |
|
Swimming & Diving |
243/274/12 |
4,919 |
256/283 |
5,600/60 |
|
Tennis |
293/309/9 |
6,085 |
327/341 |
8,920/21 |
|
Track & Field |
655/683/0 |
23,232 |
648/681 |
17,009/0 |
|
Volleyball |
- |
- |
704/720 |
19,067 |
|
Wrestling |
459/483/159 |
9,355 |
- |
0/2 |
(A) The first number is the number of schools reporting sponsorship on the Sports Participation Survey. The second number indicates schools sponsoring the sport including primary and secondary schools in cooperative programs as of May 22, 2017. The third number indicates the number of schools that had girls playing on teams consisting primarily of boys.
(B) The second number indicates the number of additional g