Evaluation of the walking pattern in two types of patients with anterior cruciate ligament deficiency: copers and non-copers
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Evaluation of the walking pattern in two types of patients with anterior cruciate ligament deficiency: copers and non-copers. / Alkjaer, T; Simonsen, Erik B; Jørgensen, Uffe; Dyhre-Poulsen, Poul.
In: European Journal of Applied Physiology, Vol. 89, No. 3-4, 01.05.2003, p. 301-8.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Evaluation of the walking pattern in two types of patients with anterior cruciate ligament deficiency: copers and non-copers
AU - Alkjaer, T
AU - Simonsen, Erik B
AU - Jørgensen, Uffe
AU - Dyhre-Poulsen, Poul
PY - 2003/5/1
Y1 - 2003/5/1
N2 - The purpose of the present study was to investigate whether different walking patterns in healthy subjects and in coper and non-coper subjects with deficient anterior cruciate ligaments could be quantified. An inverse dynamics approach was used to calculate joint kinematics and kinetics for flexion and extension. EMG signals of the hamstrings and quadriceps muscles were recorded. The results showed that the peak knee flexion angle was greater in the copers than in the controls. There was a positive correlation between the peak knee extensor moment and peak knee flexion angle. Furthermore, at a given peak knee flexion angle, the peak knee extensor moment was significantly larger in the controls than in the non-copers. The hip extensor moment in the copers was significantly larger than that of the non-copers and the controls. In conclusion, the three groups walked according to different patterns. It is suggested that the copers stabilized their knee joint by co-contraction of the hamstrings and quadriceps muscles, while the non-copers lacked this ability. Instead, the non-copers reduced the knee extensor moment in order to decrease anterior displacement of the tibia. The walking pattern differences observed between the copers and non-copers may explain their different post-injury activity levels.
AB - The purpose of the present study was to investigate whether different walking patterns in healthy subjects and in coper and non-coper subjects with deficient anterior cruciate ligaments could be quantified. An inverse dynamics approach was used to calculate joint kinematics and kinetics for flexion and extension. EMG signals of the hamstrings and quadriceps muscles were recorded. The results showed that the peak knee flexion angle was greater in the copers than in the controls. There was a positive correlation between the peak knee extensor moment and peak knee flexion angle. Furthermore, at a given peak knee flexion angle, the peak knee extensor moment was significantly larger in the controls than in the non-copers. The hip extensor moment in the copers was significantly larger than that of the non-copers and the controls. In conclusion, the three groups walked according to different patterns. It is suggested that the copers stabilized their knee joint by co-contraction of the hamstrings and quadriceps muscles, while the non-copers lacked this ability. Instead, the non-copers reduced the knee extensor moment in order to decrease anterior displacement of the tibia. The walking pattern differences observed between the copers and non-copers may explain their different post-injury activity levels.
KW - Adaptation, Physiological
KW - Adaptation, Psychological
KW - Adult
KW - Anterior Cruciate Ligament
KW - Chronic Disease
KW - Electromyography
KW - Gait
KW - Humans
KW - Joint Instability
KW - Knee Injuries
KW - Knee Joint
KW - Leg
KW - Male
KW - Muscle Contraction
KW - Muscle, Skeletal
KW - Recovery of Function
KW - Severity of Illness Index
U2 - 10.1007/s00421-002-0787-x
DO - 10.1007/s00421-002-0787-x
M3 - Journal article
C2 - 12736838
VL - 89
SP - 301
EP - 308
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
SN - 1439-6319
IS - 3-4
ER -
ID: 33887614