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Quadricep Muscle Contracts Differently After ACL Reconstruction: May Contribute to Lingering Weakness

November 2, 2021

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Physiotherapist Stretching Leg Of Sportsman Patient
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Presented by School of Kinesiology

After an anterior cruciate ligament reconstruction surgery, it’s common to experience quadriceps weakness, which was thought to be caused primarily by muscle atrophy, or shrinkage.

But researchers at the University of Michigan School of Kinesiology have found an additional cause, which could help clinicians design more effective rehabilitation programs.

They found that besides muscle loss, the quadricep muscle—specifically, the fibers within that muscle—contract differently. Taken together, these deficits result in a muscle that is weaker and behaves like that of someone much older.

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