Faxon, J.L.; Sanni, A.A.; McCully, K.K. Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery. J. Funct. Morphol. Kinesiol.2018, 3, 56.
Faxon, J.L.; Sanni, A.A.; McCully, K.K. Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery. J. Funct. Morphol. Kinesiol. 2018, 3, 56.
Faxon, J.L.; Sanni, A.A.; McCully, K.K. Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery. J. Funct. Morphol. Kinesiol.2018, 3, 56.
Faxon, J.L.; Sanni, A.A.; McCully, K.K. Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery. J. Funct. Morphol. Kinesiol. 2018, 3, 56.
Abstract
Background: Knee joint is a common site for injury among younger people, the purpose of this study is to measure the skeletal muscle endurance and strength on people with prior knee reconstruction surgery. Methods: Young healthy female subjects were tested who reported having knee reconstruction surgery of over one year prior to testing. The skeletal muscle endurance index of the hamstring and quadriceps muscles was determined as the decline in the specific muscle acceleration in response to 2, 4, and 6 Hz electrical stimulation. Maximal isometric muscle strength (MVC) was measured in the hamstring and quadriceps muscles. Results: The hamstring muscles in the affected leg had less endurance than the non-affected leg at 6 Hz stimulation (55.5 ± 13.2% versus 78.0 ± 13.3%, P = 0.01). Muscle endurance was not reduced in the quadriceps muscles in the affected leg compared to the non-affected leg at 6 Hz stimulation (78.0 ± 13.3% versus 80.3 ± 10.0%, P = 0.69). There were no differences in MVC between the affected and non-affected legs for either the hamstring (P= 0.20) or quadriceps muscles (p = 0.67). Conclusions: Muscle endurance is reduced in the hamstring muscles at least one-year post injury, while hamstring strength is not. Reduced hamstring muscle endurance could be a result of a lack of focus on muscle endurance during rehabilitation after injury and may contribute to re-injury in the particular muscle even in people who have recovered muscle strength.
Medicine and Pharmacology, Orthopedics and Sports Medicine
Copyright:
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