After ACL reconstruction, what type of exercises are typically encouraged?

• A. High-impact plyometrics
• B. Open chain quadriceps strengthening
• C. Closed chain exercises
• D. Isometric glute strengthening

Answer: (C)

Following ACL reconstruction, the rehabilitation focuses on restoring function, stability, and strength to the knee joint while minimizing the risk of re-injury. Closed chain exercises are particularly beneficial after ACL surgery because they engage multiple muscle groups and involve the lower extremity in a stable environment, which is more reflective of functional activities.

Closed chain exercises, such as squats or leg presses, allow for joint compression which promotes stability and enhances proprioception. These exercises tend to activate the quadriceps and hamstrings in a way that supports the knee joint, making it safer to build strength and improve range of motion. This approach gradually prepares the body for the demands of daily activities and sports participation.

In contrast, high-impact plyometrics may place excessive stress on the healing ligament and joint in the early stages post-surgery. Open chain quadriceps strengthening has its place in rehabilitation, but it generally does not provide the same stability benefits as closed chain exercises. Isometric glute strengthening may assist in overall lower extremity function but lacks the dynamic engagement necessary to specifically benefit the knee post-reconstruction. Thus, closed chain exercises are the recommended approach in the early rehabilitation phase to ensure a safe and effective recovery.