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 Rises to 4-Year High
July 10, 2018
By Geoff Kimmerly
Second Half editor
While enrollment in MHSAA member high schools saw another slight dip in 2017-18, participation in the 28 sports for which the MHSAA sponsors postseason tournaments rose to its highest point since 2013-14.
A total of 284,920 participants competed in MHSAA-sponsored sports this past school year, up 0.46 percent from 2016-17 – and despite a 1 percent drop in enrollment at member schools during that time. 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.
Girls participation rose for the third straight year to 121,349 participants, up 1.2 percent from 2016-17 and despite a 1.1 percent enrollment drop over the last year. Boys participation fell to 163,571 participants, a decrease of less than a tenth of a percent from the previous year – and much smaller than the boys enrollment decrease of nearly a full percent.
Girls lacrosse has set a participation record every season since becoming a sponsored tournament sport in 2005, and did so this spring with 2,900 participants – a 3.1 percent increase from a year ago. Boys lacrosse also set a record for the second year in a row, up 1.1 percent with 5,168 participants. Both boys and girls bowling broke records previously set in 2015-16 – boys bowling participation increased 8.4 percent over 2016-17 with 4,136 participants, while girls bowling was up 4.5 percent with 3,058 athletes. Also setting a record in 2017-18 was boys cross country, which saw record participation for the second straight season last fall with 9,656 runners (an increase of 2.6 percent).
The largest percentage increase in participation this school year came in girls gymnastics, which jumped 10.4 percent with 702 athletes – its most since 2011-12. Girls golf also enjoyed a notable increase, up 4.2 percent to 3,712 athletes – its highest participation total since 2007-08.
Six sports total saw increases in participation on both the girls and boys’ sides. In addition to bowling and lacrosse, girls cross country joined the record-setting boys with a 2.4 percent increase. Girls and boys swimming & diving both enjoyed increases for the second straight year, this time both by 2.4 percent. Girls tennis was up 2.3 percent to its highest total (9,123) since 2012-13, and boys tennis participation increased by one percent. Boys track & field (1.5 percent) increased for the third straight year, while girls track & field (1.6 percent) was up for the second consecutive.
Volleyball led participation among girls sports with 19,416 participants, up 1.8 percent from 2016-17. Other sports to see increases in 2017-18 were girls skiing, up 2.8 percent as participation increased for the second straight season; boys basketball, up a half percent; and girls soccer, which had four more athletes this spring than during the 2017 season.
Also of note in this year’s survey:
• The increase in participation for 18 sports during 2017-18 was compared to an increase in 16 sports for 2016-17 and 15 sports in 2015-16.
• Of 10 sports that saw decreases in participation in 2017-18, five were down less than a percent. Competitive cheer had five fewer athletes but 6,715 total, and there were three fewer boys golfers to take that total to 2,267. Boys skiing was down six athletes total to 831, while boys soccer was down 11 athletes and girls softball down 31 – both less than a quarter of a percent off their 2016-17 totals.
• Football experienced a much smaller decrease in participation last season than it had from 2015-16 to 2016-17, falling only 1.9 percent to 37,002 athletes – still the most participating in any sport by more than 13,000 athletes. The combined number of 11 and 8-player varsity teams sponsored by MHSAA schools last fall remained constant compared to recent seasons, although a shift of some programs from 11-player to 8-player continued.
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 2017-18 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 |
642/655/5 |
17,668 |
- |
0/7 |
|
Basketball |
730/729/1 |
21,367 |
691/723 |
15,654/5 |
|
Bowling |
385/391/18 |
4,098 |
360/381 |
3,058/38 |
|
Competitive Cheer |
- |
- |
343/353 |
6,715 |
|
Cross Country |
640/651/4 |
9,650 |
620/650 |
8,696/6 |
|
Football - 11 player |
578/582/89 |
35,475 |
- |
0/108 |
|
8-player |
71/74/10 |
1,406 |
- |
0/13 |
|
Golf |
506/530/66 |
6,146 |
340/339 |
3,712/121 |
|
Gymnastics |
- |
- |
83/96 |
702 |
|
Ice Hockey |
240/269/9 |
3,353 |
- |
292/12 |
|
Lacrosse |
154/161/5 |
5,161 |
109/113 |
2,900/7 |
|
Skiing |
96/107/1 |
830 |
95/107 |
767/1 |
|
Soccer |
484/506/20 |
14,550 |
468/483 |
13,216/69 |
|
Softball |
- |
- |
624/643 |
13,610 |
|
Swimming & Diving |
246/274/14 |
5,020 |
261/280 |
5,732/78 |
|
Tennis |
295/309/12 |
6,134 |
332/340 |
9,123/31 |
|
Track & Field |
668/686/2 |
23,566 |
659/685 |
17,288/14 |
|
Volleyball |
- |
- |
715/717 |
19,416 |
|
Wrestling |
467/482/152 |
9,147 |
- |
126/250 |
(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 14, 2018. 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 girls playing on teams consisting primarily of boys and entered in boys competition.
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, w