Clinical observation on treatment of subacute lateral ankle sprain by electroacupuncture and its effect on anterior talofibular ligament: study protocol for a randomized controlled trial

INTERVENTION: Electroacupuncture treatment group:Electroacupuncture;Rehabilitation function trainings group:rehabilitation function trainings; CONDITION: subacute lateral ankle sprains PRIMARY OUTCOME: Visual Analogue Scale; SECONDARY OUTCOME: Baird‐Jackson scores;Weight‐Bearing Lunge Test;Star Excursion Balance Test;Musculoskeletal Ultrasound; INCLUSION CRITERIA: 1. A clear history of LAS and no other deformities in the foot; 2. More than 2 weeks and less than 3 months about the duration of the disease[7]; 3. Consistent with Grade I and Grade II ankle sprains according to negative anterior drawer and talar‐tilt tests; 4. No complete fracture of ankle ligament by MSK US and no fracture or dislocation by radiographs; 5. Age above 16 years old, under 65 years old (including 65 years old); 6. Agree to participate and sign the informed consent form.