Chronic ankle instability
Conditions
Interventions
Intervention Group of the Randomized Controlled Trial (Stroboscopic Visual Balance Training):Study participants will wear stroboscopic glasses (frequency: 5Hz) during balance training.
The first week
based on the participant’s adaptation level, five training modes will be selected as one set, repeated for three sets).
From the second week onward, dynamic balance training will be implemented accord
? Unanticipated hop to stabilization (15 repetitions per set, three sets)
? Single leg standing balance activities on an unstable surface (30–45s per set, three sets)
? Single leg standing ball catching and throwing (15 repetitions per set, three sets)
? Single leg standing ball catching and throwing on an unstable surface (15 repetitions per set, three sets).
The intervention will be conducted 3 times per week, each session lasting approximately 30
Control Group of the Randomized Controlled Trial(Conventional Balance Training):The control group will perform the same conventional balance training protocol as the intervention group, including adap
Sponsors
Huashan Hospital Affiliated to Fudan University
Eligibility
Sex/Gender
All
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: Cross-sectional study participants-Healthy Population Group (Control Group): (1) Aged 18–60 years; (2) No history of ankle sprain or symptoms of chronic ankle instability; (3) No musculoskeletal disorders of the lower limbs (e.g., arthritis, hip/knee pathologies, surgical history); (4) No severe visual impairment that would interfere with testing using stroboscopic glasses; (5) No neurological diseases or cognitive impairments; (6) Able to follow verbal instructions and provide signed informed consent. Cross-sectional study participants-CAI Group (Case Group): (1) Patients diagnosed with chronic ankle instability according to the International Ankle Consortium criteria, with a clear history of recurrent ankle sprains (initial sprain occurring at least 12 months prior to enrollment, and the most recent sprain at least 3 months prior to enrollment); the ankle has experienced at least two episodes of "giving way" or "feeling unstable" in the past 6 months; preliminary screening using the Cumberland Ankle Instability Tool (CAIT), with participants scoring =24 points; (2) Aged 18–60 years; (3) No severe visual impairment that would interfere with the use of stroboscopic glasses; (4) Able to follow verbal instructions and provide signed informed consent. Participants of the randomized controlled study: (1) Patients diagnosed with chronic ankle instability according to the International Ankle Consortium criteria, with a clear history of recurrent ankle sprains (the initial sprain occurring at least 12 months before enrollment, and the most recent sprain at least 3 months before enrollment); the ankle has experienced at least two episodes of "giving way" or "feeling of instability" in the past 6 months; preliminary screening using the CAIT, with participants scoring =24; (2) Aged 18–60 years; (3) No severe visual impairment that would interfere with the use of stroboscopic glasses; (4) Able to follow verbal instructions and provide signed informed consent.
Exclusion criteria
Exclusion criteria: Cross-sectional study participants-Healthy Population Group (Control Group): (1) Acute injury to the lower limbs within the past 3 months; (2) Contraindications to stroboscopic visual stimulation (e.g., epilepsy, photosensitivity); (3) Other conditions affecting balance testing (e.g., vestibular dysfunction, severe cardiovascular disease); (4) Inability to complete all assessment items. Cross-sectional study participants-CAI Group (Case Group): (1) Acute ankle injury within the past 3 months (e.g., fracture, complete ligament rupture); (2) Severe neurological disease or cognitive impairment; (3) Other musculoskeletal or neuromuscular disorders of the lower limbs (e.g., hip/knee pathologies, neuromuscular diseases); (4) Contraindications to stroboscopic visual stimulation (e.g., epilepsy, photosensitivity); (5) Use of bracing/orthotic treatment or medication interventions (e.g., corticosteroid injections) within the past 3 months; (6) Inability to complete all assessment items. Participants of the randomized controlled study: (1) Acute ankle injury within the past 3 months (e.g., fracture, complete ligament rupture, etc.); (2) Severe neurological disease or cognitive impairment; (3) Other musculoskeletal disorders of the lower limbs (e.g., hip/knee pathologies, neuromuscular diseases, arthritis, etc.); (4) Contraindications to stroboscopic visual training (e.g., epilepsy, photosensitivity, etc.); (5) Use of bracing/orthotic treatment or medication interventions (e.g., corticosteroid injections) within the past 3 months; (6) Inability to complete all training and assessment sessions.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Modified Star Excursion Balance Test ; | — |
Secondary
| Measure | Time frame |
|---|---|
| Cumberland Ankle Instability Tool;Olerud-Molander Ankle Score;American Orthopedic Foot and Ankle Society Ankle-Hindfoot Score;Numeric Rating Scale;Single-leg standing stability test;Continuous single-leg jumping test;Surface electromyography test; | — |
Countries
China
Contacts
Public ContactChan Chen
Rehabilitation Medicine Department of Huashan Hospital Affiliated to Fudan University
Outcome results
None listed