Effects of Combining Mobilization of the Proximal Tibiofibular Joint and the Talocrural Joint in Subjects with Ankle Instability

INTERVENTION: The experimental group will receive joint mobilization treatment for the proximal tibiofibular joint and the talocrural joint. Dosage of mobilization will be 2 sets of 10 repetitions at each joint, twice a week for 3 weeks. The intervention will be given by a physical therapist. CONDITION: Ankle instability; ; Ankle instability Musculoskeletal ‐ Other muscular and skeletal disorders PRIMARY OUTCOME: Foot and ankle ability measure (FAAM) [Baseline and after 3 weeks of the treatment (primary timepoint)] Range of ankle dorsiflexion measured by an inclinometer; [Baseline, immediately after the 1st treatment session (primary timepoint), and after 3 weeks of the treatment] Range of tibial internal rotation measured by a tibial rotational disc[Baseline, immediately after the 1st treatment session (primary timepoint), and after 3 weeks of the treatment] SECONDARY OUTCOME: Dynamic balance (Y balance test)[Baseline, immediately after the 1st treatment session, and after 3 weeks of the treatment] Peak ground reaction force ; Measurement tool: a force plate ; Definition: peak force magnitudes that occurred following contact[Baseline, immediately after the 1st treatment session, and after 3 weeks of the treatment] Time to stabilization after landing ; Measurement tool: a force plate ; Definition of time to stabilization: A period of time that required for the ground reaction forces exhibited after landing from a jump to stabilize within a range similar to that exhibited during a stable, single‐limb stance ; [Baseline, immediately after the 1st treatment session, and after 3 weeks of the treatment] INCLUSION CRITERIA: 1. Age between 20‐60 2. Greater than or equal to 1 significant ankle sprain and recurrent sprain greater than or equal to 2 times 3. Feeling of instability at the ankle 4. Compared to the opposite side ankle Dorsiflexion range of motion greater than or equal to 5° deficit and proximal tibiofibular joint hypomobility OR tibial internal range of motion greater than or equal to 5° deficit and proximal tibiofibular joint hypomobility