Repeated and prolonged use of smart phones has negative impacts on the human body. The purpose of this study was to determine the association of Mobile usage on Postural Stability, Hamstring Flexibility and Trunk Extensor Muscle Fatigue in women. A total of 100 voluntary participants were selected randomly for this study. The female students who uses mobile for at least 3 hrs daily for last 1 year with age group of 18-25 years were included in this study. Static stability, Dynamic stability, Hamstring flexibility and Trunck extensor muscle fatigue were measured by one leg standing balance test, Functional reach test, sit and reach test and Trunk muscle fatigue induced used method using Borg Scale respectively. The mean age, height and weight of all the participants were 20.96 years (±1.96±), 156.17 cm (±15.96) and52.92 kg (±10.29) respectively. All the participants were examined for their fatigue by Sorensen test and the average fatigue time was 90.99 sec (±46.35). Then the perceived rate of exertion were assessed for all the participants and its mean score was 17.05 (±1.28). The sit and reach test of all participants were also examined whose mean score was 21.80 cm (±6.97). This study has revealed the prevalence of flexibility issues in population of female students who are frequent users of cell phone.

Keywords : Postural Stability; Hamstring Flexibility; Muscle fatigue; Mobile Usage.