Antagonist muscle moment is increased in ACL deficient subjects during maximal dynamic knee extension
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Antagonist muscle moment is increased in ACL deficient subjects during maximal dynamic knee extension. / Alkjær, Tine; Simonsen, Erik B; Magnusson, S Peter; Dyhre-Poulsen, Poul; Aagaard, Per.
In: Knee, Vol. 19, No. 5, 10.2012, p. 633-639.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Antagonist muscle moment is increased in ACL deficient subjects during maximal dynamic knee extension
AU - Alkjær, Tine
AU - Simonsen, Erik B
AU - Magnusson, S Peter
AU - Dyhre-Poulsen, Poul
AU - Aagaard, Per
N1 - Copyright © 2011 Elsevier B.V. All rights reserved.
PY - 2012/10
Y1 - 2012/10
N2 - INTRODUCTION: Coactivation of the hamstring muscles during dynamic knee extension may compensate for increased knee joint laxity in anterior cruciate ligament (ACL) deficient subjects. This study examined if antagonist muscle coactivation during maximal dynamic knee extension was elevated in subjects with anterior cruciate ligament (ACL) deficiency compared to age-matched healthy controls. METHODS: Electromyography (EMG) and net knee joint moments were recorded during maximal concentric quadriceps and eccentric hamstring contractions, performed in an isokinetic dynamometer (ROM: 90-10°, angular speed: 30°/s). Hamstring antagonist EMG recorded during concentric quadriceps contraction was converted into antagonist moment based on the EMG-moment relationship observed during eccentric agonist contractions. RESULTS: The magnitude of antagonist hamstring EMG was 65.5% higher in ACL deficient subjects compared to healthy controls (p
AB - INTRODUCTION: Coactivation of the hamstring muscles during dynamic knee extension may compensate for increased knee joint laxity in anterior cruciate ligament (ACL) deficient subjects. This study examined if antagonist muscle coactivation during maximal dynamic knee extension was elevated in subjects with anterior cruciate ligament (ACL) deficiency compared to age-matched healthy controls. METHODS: Electromyography (EMG) and net knee joint moments were recorded during maximal concentric quadriceps and eccentric hamstring contractions, performed in an isokinetic dynamometer (ROM: 90-10°, angular speed: 30°/s). Hamstring antagonist EMG recorded during concentric quadriceps contraction was converted into antagonist moment based on the EMG-moment relationship observed during eccentric agonist contractions. RESULTS: The magnitude of antagonist hamstring EMG was 65.5% higher in ACL deficient subjects compared to healthy controls (p
U2 - 10.1016/j.knee.2011.12.006
DO - 10.1016/j.knee.2011.12.006
M3 - Journal article
C2 - 22284964
VL - 19
SP - 633
EP - 639
JO - Knee
JF - Knee
SN - 0968-0160
IS - 5
ER -
ID: 38288092