Using the non-parametric statistics, historical research must be conducted by recording the intense injuries and the symptoms in professional soccer players by studying the frequency of occurrence and injury rate during sports and practices.
MATERIALS AND METHOD
Professional soccer players of any team, while playing in their league, has to be studied on daily basis for past few years when they are engaged in their preseason time July to August and game season September to May . Other important data that is also required may include the age, experience statistical distribution and anthropometric attributes of each player.
During the game activities in past years, the record of personal consultations may also be available where players registered any injury received in ongoing games or practices that resulted in missing the upcoming game or practice session. The external risk elements, the active causes, the attributes, the anatomical points, and the event, whether it is practice session or actual game, of the muscular or skeletal traumas will provide crucial statistics.
Any physical incident occurred during actual game or practice session that keeps a player to continue his game or practice session is called as injury. Injuries are categorized into three grades depending upon their severity:
Minor injury: It keeps the player absent from games or practices for not more than one week.
Moderate injury: It keeps the player absent from game or practices for one week to one month
Major injury: It keeps player absent from game or practices for more than one month.
In many previous studies, the same categorization has been done ( Hawkins, Hulse, Wilkinson, Hodson & Gibson, 2001). Injury rate is measured as injuries occurred in each thousand hours of playing; this involves both practicing and actual game Note that in historical research it would be recommended to exclude the goalkeepers as various similar research studies showed they incur different rates of injuries.
By recording a total of 100 injuries we can discover the percentage of injuries occurred during the actual game and during practice sessions. The intensity of injuries that results in absence from the game or practice can also be measured. The findings will show the rate of mild injuries, moderate injuries and major injuries as well.
The anatomic point and the kind of injuries must be a focus in historical research. Studied cases may involve injuries on Spine, thorax, back, lumbar spine, Pelvis, femur, knee, tibia, ankle, foot, shoulder, elbow, wrist, and hand injuries.
Previous studies had showed that in lower extremity injuries, the knees and ankles are the most injured joints of the soccer players ( Hawkins, Hulse, Wilkinson, Hodson & Gibson, 2001).
Ankle injuries are reported to be occurred about 1631 % of the all, whereas knee injuries are almost 1434%. There is a dramatic need of more historical research within the ankle and knee injuries to investigate percentages in youth and adult players having mixed skill levels ( Peterson, Junge, Chomiak, Graf-Baumann & Dvorak, 2000).