Relationship between quadriceps femoris muscle volume and muscle torque after anterior cruciate ligament repair

This study was performed to obtain evidence regarding bilateral hindrance of motor unit (MU) recruitment in the quadriceps femoris (QF) of patients with anterior cruciate ligament (ACL) reconstruction. The subjects included 70 patients who underwent ACL reconstruction and 35 healthy subjects. To ide...

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Bibliographic Details
Published in:Scandinavian journal of medicine & science in sports 2007-12, Vol.17 (6), p.656-661
Main Authors: Konishi, Y., Ikeda, K., Nishino, A., Sunaga, M., Aihara, Y., Fukubayashi, T.
Format: Article
Language:English
Subjects:
ACL
Adolescent
Adult
Anterior Cruciate Ligament - surgery
Anterior Cruciate Ligament Injuries
Cross-Sectional Studies
Female
Human mechanics
Humans
Japan
Legs
Ligaments
Male
Movement
muscle volume
Muscle, Skeletal - physiology
Muscular system
Outcome Assessment (Health Care)
QF weakness
Quadriceps Muscle - physiology
reconstruction
Reconstructive Surgical Procedures
Sports injuries
Sports medicine
Torque
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Summary:This study was performed to obtain evidence regarding bilateral hindrance of motor unit (MU) recruitment in the quadriceps femoris (QF) of patients with anterior cruciate ligament (ACL) reconstruction. The subjects included 70 patients who underwent ACL reconstruction and 35 healthy subjects. To identify the muscle torque per unit volume (MTPUV), the peak torque of each velocity of isokinetic performance was divided by muscle volume of the QF measured by a series of cross‐sectional images obtained by magnetic resonance imaging scans. Tests revealed that the mean MTPUV of the uninjured (0.113±0.03 N m/cm3 at 60°/s, 0.081±0.02 N m/cm3 at 180°/s) and injured sides (0.109±0.03 N m/cm3 at 60°/s, 0.079±0.023 N m/cm3 at 180°/s) were significantly lower than those of the control group (0.144±0.05 N m/cm3 at 60°/s, 0.096±0.04 N m/cm3 at 180°/s). Previous studies suggested that MU recruitment in the QF of patients with ACL injury was hindered bilaterally. However, the design of their studies could not provide evidence of bilateral hindrance of MU recruitment in the QF. The results of the present study demonstrated that the MTPUV of both injured and uninjured sides of patients were significantly lower than those of the control group.
ISSN:0905-7188
1600-0838
DOI:10.1111/j.1600-0838.2006.00619.x