Background: Football is one of the most popular sports worldwide. A prevalent muscle injury in sports is the hamstring injury. The FASH (Functional assessment scale for acute hamstring injuries) has been designed for use in English, German, and Greek. Only patients and players who were mostly field and track athletes and spoke Greek were used to examine the instrument's validity and reliability.

Objective: The study was aimed to check the validity of FASH-Ur.

Study Design: Cross sectional study

Methodology: The FASH-Ur validity was examined in 25 cricket players, 33 players without symptoms, and 18 players with hamstring injuries (Patients group) (at risk group). By comparing the FASH-Ur total scores of the wounded and non-damaged groups, validity was examined.

Results: Significant disparities between wounded and non-damaged individuals proved the recognized group's validity (p < 0.001). The FASH-Ur exhibited very good reliability test (intra-class correlation coefficient = 0.852, p < 0.001). Cronbachs alpha test was used for the internal consistency within the groups, cronbachs alpha value was 0.858 indicates our scale high level of internal consistency.

Conclusion: The FASH-Ur was a trustworthy and accurate tool to evaluate the seriousness of hamstring injuries in football players who spoke Urdu

Index Terms-

Hamstring injuries, Sports Injuries, FASH, Football, Validity.