Hamstrings co-activation in ACL-deficient subjects during isometric whole-leg extensions
نویسندگان
چکیده
منابع مشابه
Medial and lateral hamstrings and quadriceps co-activation affects knee joint kinematics and ACL elongation: a pilot study
BACKGROUND Many injury prevention and rehabilitation programs aim to train hamstring and quadriceps co-activation to constrain excessive anterior tibial translation and protect the anterior cruciate ligament (ACL) from injury. However, despite strong clinical belief in its efficacy, primary evidence supporting training co-activation of the hamstrings and quadriceps muscles for ACL injury preven...
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It is believed that regional activation within a muscle may lead to greater site-specific muscular adaptations in the activated portion of the muscle. Because the hamstrings are a biarticular muscle, it can be theorized that single-joint exercises where movement originates at the hip vs. the knee will result in differential activation of the muscle complex. The purpose of the present study was ...
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It is well documented that the ability of human muscles to develop tension is dependent on the angular velocity. In concentric actions, the decline of maximal voluntary torque, consequential to a velocity increase, has been extensively studied. The underlying mechanisms may be attributed to either or both chemical and mechanical muscle properties and/or motor unit activation by the central nerv...
متن کاملA Comparison of in Vivo Knee Kinematics during a Leg Press Activity between Acl Deficient an D Medial Osteoarthritic Knees
INTRODUCTION: A long-term effect of chronic anterior cruciate ligament (ACL) deficiency is development of degenerative changes in the knee [1]. Andriacchi et al. [2] noted cartilage homeostasis would not be maintained by abnormal kinematics after ACL rupture and cartilage degeneration would initiate. However, no study to date has compared kinematics between ACL deficient knees and primary osteo...
متن کاملNeuromuscular fatigue development during maximal concentric and isometric knee extensions.
This study aimed to investigate mechanisms of neuromuscular fatigue during maximal concentric and isometric leg extensions inducing similar torque decrements. Nine physically active men performed two separate fatiguing sessions maintained until similar torque decreases were obtained. The first session, only conducted under isokinetic concentric conditions (CON), consisted of three series of 30 ...
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ژورنال
عنوان ژورنال: Knee Surgery, Sports Traumatology, Arthroscopy
سال: 2009
ISSN: 0942-2056,1433-7347
DOI: 10.1007/s00167-009-0802-4