BACKGROUND: Functional ankle instability (FAI) is a common consequence of ankle sprain injury, especially in high-impact sports. OBJECTIVES: To investigate the effect of six weeks of suspension training with total resistance exercises (TRX) on proprioception and muscle strength in female athletes with FAI. METHODS: Thirty female athletes with FAI (age 21.9 +/- 2.2 years, height 169.3 +/- 4.2 cm, and weight 59.8 +/- 6.1 kg) were randomly assigned to two equally numbered groups: TRX training and controls based on inclusion and exclusion criteria. In the pre-test, the anthropometric variables and also proprioception accuracy and muscle strength of subjects were evaluated by joint angle reset test (JART) and manual muscle testing (MMT) in both dorsiflexion and plantarflexion motions. The training group completed three sessions per week with progressive load for six weeks, and each training session lasted 15 to 20 minutes, whilst control subjects continued with their normal activity without special sport activities. After six weeks of training, all tests performed in the pre-test phase were also performed in the post-test phase. The t-test was used for statistic analysis (alpha <= 0.05). RESULTS: The findings showed that TRX training significantly improved the proprioception accuracy (<= 0.001) and muscle strength (p <= 0.001) in the training group rather than the control group. No statistically significant difference was found in any of the tests between pre-test and post-test for the control group (p > 0.05). CONCLUSIONS: Six weeks of TRX suspension training had a positive effect on strength and proprioception accuracy in female athletes with FAI.

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