Evidence Level B
Randomized controlled trials (RCTs) of <200 participants, methodologically flawed RCTs of >200 participants, methodologically flawed systematic reviews (SRs) or good quality observational (cohort) studies.
Reduction in ankle instability: there is medium-quality evidence to suggest that early mobilisation in ankle sprain, with the use of an external support, reduces risk of the ankle giving way when compared with minimal treatment.
More info from BMJ Clinical Evidence