They said that it appears that open chain activities after 6 weeks may improve strength without adversely affecting the surgical graft and / or increasing graft laxity (e.g. looseness), and that the evidence was currently insufficient to determine whether open
chain knee exercises before 6 weeks postsurgery was safe.
The reviewers found few studies evaluating the effectiveness in the ACL rehabilitation process of so - called «open
chain»
exercises (those which tend to isolate a single muscle group and a single joint, such as leg curls and leg extensions, with or without added weight) versus «closed
chain»
exercises (those which work multiple joints and multiple muscle groups at once, such as, for example, a squat involves the
knee, hip and ankle joints, and multiple muscles groups, e.g. quads, hamstrings, hip flexors, calves and glutes, with body weight alone or with added weight).
So about four months ago, I restarted MAF training on elliptical and
exercise bike, minus 5 bpm, combined with a weightlifting rehab program centered largely on posterior
chain movements such as Romanian deadlifts, single leg deadlifts, glute bridges, etc (the
knee has finally been showing steady improvement since I began).