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 Member Schools Continue Rebound in Sports Participation with 2022-23 Climb
By
Geoff Kimmerly
MHSAA.com senior editor
July 14, 2023
Participation in Michigan High School Athletic Association-sponsored sports increased for the second-straight school year in 2022-23, continuing its recovery from a COVID-related decline and despite another decrease in school enrollment among the MHSAA’s 750 member high schools.
A total of 268,071 participants were counted across the 28 sports for which the MHSAA sponsors postseason tournaments – a 2.7-percent increase from 2021-22 as participation has grown a combined 9.9 percent from a drastic downturn in 2020-21 during the height of the COVID-19 pandemic.
The 2022-23 increase of 2.7 percent also came as enrollment at MHSAA member schools fell 3.2 percent from the previous year. More specifically, boys participation rose 3.4 percent to 156,501 participants, despite a 2.9-percent decrease in boys enrollment. Girls participation rose 1.7 percent to 111,570 participants despite a 3.4-percent enrollment dip. 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.
A total of 18 sports saw increases in participation in 2022-23 compared to 2021-22, with wrestling the largest gainer by 15.7 percent to 10,477 athletes – a rise in part attributable to a 41-percent increase in girls participation to 874 wrestlers which coincided with the second year of the MHSAA sponsoring a girls-only division at its Individual Finals. This year’s wrestling total was the sport’s highest since 2012-13.
Boys bowling enjoyed the next largest increase at 8.1 percent to 4,417 participants. Five more sports saw increases in participation by at least five percent over the previous school year – girls track & field (5.6 percent to 16,470 participants), boys lacrosse (5.6 percent to 5,038), girls lacrosse (5.3 percent to 3,215), girls bowling (5.3 percent to 2,826) and football (5.2 percent to 34,997).
Also enjoying increases in participation during the 2022-23 school year were boys track & field (up 4.9 percent from 2021-22), girls competitive cheer (3.5 percent), boys basketball (3.2), girls tennis (2.9), girls volleyball (2.5), girls skiing (2.0), girls basketball (1.4), boys golf (1.3), boys soccer (0.9), baseball (0.8) and girls soccer (0.3). Of the eight sports that did see declines in 2022-23, four experienced decreases in participation that were lower than the 3.2-percent decrease in enrollment at MHSAA member schools – boys ice hockey (-1.4 percent), boys cross country and boys tennis (both -0.9 percent) and softball (-0.7).
Football, with a combined 34,997 participants over the 11 and 8-player formats, remained the most-played sport during the 2022-23 school year in posting its highest total of athletes since 2018-19. Boys track & field (23,211) and boys basketball (20,663) were next for total participants, followed by girls volleyball (19,270) – which remained the most popular girls sport – and then baseball (16,663) and girls track & field (16,470).
For the second-straight year, girls skiing (854 athletes) posted its highest participation total since 1998-99. Boys golf (6,916) joined wrestling in posting its highest total since 2012-13, and girls volleyball enjoyed its highest participation since 2017-18. Boys track & field, girls track & field and baseball all posted their highest participation totals since 2018-19.
The participation figures are gathered annually from MHSAA member schools to submit to the National Federation of State High School Associations (NFHS) for compiling of its national participation survey. Results of Michigan surveys from the 2000-01 school year to present may be viewed on the MHSAA Website – www.mhsaa.com – by clicking on Schools > Administrators > Sports Participation Listing.
The following chart shows participation figures for the 2022-23 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 |
662/21 |
16,629 |
- |
-/34 |
|
Basketball |
730/1 |
20,662 |
721 |
13,788/1 |
|
Bowling |
422/14 |
4,393 |
415 |
2,826/24 |
|
Competitive Cheer |
- |
- |
352 |
5,942 |
|
Cross Country |
671/3 |
7,981 |
668 |
6,859/7 |
|
Football - 11 player |
526/108 |
32,280 |
- |
-/128 |
|
8-player |
127/13 |
2,575 |
- |
-/14 |
|
Golf |
547/57 |
6,809 |
384 |
3,708/107 |
|
Gymnastics |
- |
- |
106 |
562 |
|
Ice Hockey |
322/14 |
3,113 |
- |
-/16 |
|
Lacrosse |
183/15 |
5,015 |
127 |
3,215/23 |
|
Skiing |
125/2 |
923 |
124 |
854/3 |
|
Soccer |
480/15 |
13,221 |
485 |
11,863/58 |
|
Softball |
- |
- |
645 |
11,722 |
|
Swimming & Diving |
278/24 |
4,108 |
287 |
4,931/65 |
|
Tennis |
303/17 |
5,981 |
335 |
8,169/34 |
|
Track & Field |
694/2 |
23,208 |
692 |
16,470/3 |
|
Volleyball |
- |
- |
718 |
19,270 |
|
Wrestling |
497/288 |
9,603 |
/874 |
(A) The first number is the number of schools reporting sponsorship on the Sports Participation Survey, including primary and secondary schools in cooperative programs as of May 15, 2023. The second 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, 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 1.3 million spectators each year.