Effects of Neuromuscular Electrical Stimulation on Quadriceps Femoris Muscle Strength and Knee Joint Function in Patients After ACL Surgery: A Systematic Review and Meta-analysis of Randomized Controlled Trials.

Background: Quadriceps weakness is a common barrier to effective rehabilitation after anterior cruciate ligament (ACL) surgery. Neuromuscular electrical stimulation (NMES)-the application of electrical currents to induce muscle contraction-has been used as part of the postoperative rehabilitation regimen.

Purpose: To investigate the effects of NMES on the recovery of quadriceps strength and knee function after ACL surgery.