Injuries in Japanese Junior Soccer Players During Games and Practices.

CONTEXT:   Soccer is the most popular junior sport in the world. In junior sports, injury analysis and injury-prevention measures for players, especially those under 12 years of age, are urgently needed.

OBJECTIVE:   To prospectively study the incidence, sites, types, and mechanisms of injuries in elementary school-aged junior soccer players during games and practices.

DESIGN:   Descriptive epidemiology study.

SETTING:   Elementary school-aged junior soccer teams in Nagoya, Japan.

PATIENTS OR OTHER PARTICIPANTS:   Eighty-nine players in 5 community-based club teams of junior soccer (U-12, age range = 11-12 years; U-11, age range = 10-11 years; U-10, age ≤10 years).

MAIN OUTCOME MEASURE(S):   Data on all game and practice injuries for the 2013-2014 season were collected using an injury report form. Injury rates were calculated according to injury site, type, and mechanism.

RESULTS:   The overall injury rate was 2.59/1000 athlete-hours (AHs). The game injury rate (GIR; 6.43/1000 AHs) was higher than the practice injury rate (PIR; 1.49/1000 AHs; P < .05). The most common anatomical areas of injury during games and practices were the lower limbs (62.5% and 4.02/1000 AHs versus 38.5% and 0.57/1000 AHs, respectively). Contusions (27.6%, n = 8) were the most frequent type of overall injuries. Most game injuries resulted from body contact (43.8%, 2.81/1000 AHs), whereas most practice injuries resulted from other types of contact (53.8%, 0.83/1000 AHs).

CONCLUSIONS:   The GIRs were higher than the PIRs in Japanese junior soccer players. A lower overall PIR suggested that players in the U-12 age group practiced under appropriate conditions. However, the higher GIR in this age category needs to be decreased.