ACL Rehabilitation Analysis

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Introduction. Ruptures to the anterior cruciate ligament (ACL) are one of the most common debilitating knee injuries that can result in significant functional impairments (16). Reconstructive surgery of the ACL is encouraged as the treatment of choice, specifically for individuals who plan on returning to competitive sporting activities, or perform at extreme levels of physical activity. Some of the most vital and fundamental elements to producing a favorable outcome following ACL reconstructive surgery are the involvement in both preoperative and postoperative rehabilitation programs. The volume of literature that is generated reflects this notion as every year, various techniques and treatment protocols are employed during rehabilitation …show more content…

They permit immediate full weight bearing and restoration of full ROM after undergoing reconstruction. Rehab programs, however, still need to be progressed according to specific guidelines and parameters concerning the patient abilities. Patients participating in these programs progressed themselves faster through the protocols, and were actually gaining knee extension at much earlier periods despite the need to allow time for ligaments and collagen within the knee to heal before stressing the inserted graft. In addition, there were dramatic decreases in the number of surgical manipulations that would traditionally be required to achieve full ROM after the rehabilitation program began (8).

Using a Vibromyography (VMG) Transducer to Assess Quadriceps-Hamstring Activity Following ACL Reconstruction.

Figure 2. Simultaneous VMG recording from the left vastus lateralis and biceps femoris during squat exercise in individual with reconstructed ACL in right …show more content…

Post operation on the ACL frequently results in inhibition of the quadriceps and significant amounts of atrophy that require prolonged rehabilitations in order to reverse. Before return to activity, an accurate assessment of the quadriceps muscle is critical. Traditional techniques will typically use Isokinetic Dynamometers; a machine designed to measure the muscle strength of the injured and uninjured knees. However, a researcher by the name of Lephart reported that the isokinetic strength test alone couldn’t suitably evaluate a patient’s ability to return to activity because they only measure the peak torque that the quadriceps muscle and knee has the potential to reach, and has no direct association to overall functional performance (1). Shown in Figure 2, is a simultaneous VMG recording of several muscles within the left quadriceps—left vastus lateralis and biceps femoris—during a squat exercise in a patient with a reconstructed ACL of the right knee. A greater level of muscle activity of the lateralis during quiet standing demonstrates that the patient is favoring the right leg. This figure depicts recordings from the left leg (uninjured leg) and demonstrates dominance of the left quadriceps muscle during the eccentric contraction phase (squatting down), with maintained balance during the concentric

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