Why brace after ACL reconstruction? Clinicians will typically prescribe a functional knee brace after the patient has regained full range of motion—that’s usually between three to five months after surgery. Graft strength of the new ACL is considerably weaker than the native (original) ACL during the first 12 months, so a brace during this early period helps protect it from harmful forces that occur in everyday life or in sport. Bracing also elevates a patient’s confidence, allowing them to return to their previous or enhanced level of activity. Another important reason? Peace of mind. A functional knee brace provides not only confidence for the patient, but confidence for the surgeon, knowing that their patient’s knee is protected.