Are Leg extensions safe after ACL surgery?

Are leg extensions safe after ACL surgery? Yes—but with caution. While the leg extension machine is crucial for rebuilding quadriceps strength, improper use in the early stages of rehab can place excessive stress on the healing ACL. Research shows that controlled use, starting with isometric holds and partial reps, can help restore muscle function and prevent secondary injuries. If you're recovering from ACL surgery, consult your physical therapist to safely integrate leg extensions into your rehab program.