Risk Factors for Arthrogenic Muscle Inhibition in Acute ACL Injuries (mikereinold.com)

• 57% of acute ACL patients have arthrogenic muscle inhibition.
• 80% of AMI cases are instantly reversible with effusion/pain management.
• Modifiable risk factors: swelling, pain, joint effusion.
• Non-modifiable factors include structural damage.
• Early intervention can rapidly restore quadriceps activation.

"A recent study found that 57% of patients with acute ACL injuries exhibit arthrogenic muscle inhibition (AMI), but 80% of these cases are instantly reversible. Key risk factors include joint effusion, pain, swelling, and altered afferent input. Many of these factors are modifiable through early intervention such as effusion management and pain control. Understanding AMI risk factors helps clinicians design rehabilitation protocols that minimize inhibition and facilitate quadriceps activation."