TY  - JOUR
AU  - Thomas, Abbey C.
A2  - Thomas, Abbey C.
A2  - Villwock, Mark
A2  - Wojtys, Edward M.
A2  - Palmieri-Smith, Riann M.
DB  - BISp
DP  - BISp
KW  - Aufbautraining
KW  - Beinmuskulatur
KW  - Biomechanik
KW  - Extremität, untere
KW  - Kniegelenkverletzung
KW  - Kraftdefizit
KW  - Kraftmessung, isokinetische
KW  - Kreuzband, vorderes
KW  - Kreuzbandplastik
KW  - Kreuzbandverletzung
KW  - M. quadriceps femoris
KW  - Muskelkraft
KW  - Muskulatur, ischiocrurale
KW  - Orthopädie
KW  - Rehabilitation, posttraumatische
KW  - Sportmedizin
KW  - Sportverletzung
KW  - Therapie, operative
KW  - Training, rehabilitatives
KW  - Untersuchung, empirische
LA  - eng
TI  - Lower extremity muscle strength after anterior cruciate ligament injury and reconstruction
TT  - Muskelkraft der unteren Extremität nach Verletzung und Rekonstruktion des vorderen Kreuzbandes
PY  - 2013
N2  - Context: Quadriceps and hamstrings weakness occurs frequently after anterior cruciate ligament (ACL) injury and reconstruction. Evidence suggests that knee injury may precipitate hip and ankle muscle weakness, but few data support this contention after ACL injury and reconstruction. Objective: To determine if hip, knee, and ankle muscle weakness present after ACL injury and after rehabilitation for ACL reconstruction. Design: Case-control study. Setting: University research laboratory. Patients or Other Participants: Fifteen individuals with ACL injury (8 males, 7 females; age = 20.27 ± 5.38 years, height = 1.75 ± 0.10 m, mass = 74.39 ± 13.26 kg) and 15 control individuals (7 men, 8 women; age = 24.73 ± 3.37 years, height = 1.75 ± 0.09 m, mass = 73.25 ± 13.48 kg). Intervention(s): Bilateral concentric strength was assessed at 60°/s on an isokinetic dynamometer. The participants with ACL injury were tested preoperatively and 6 months postoperatively. Control participants were tested on 1 occasion. Main Outcome Measures: Hip-flexor, -extensor, -abductor, and -adductor; knee-extensor and -flexor; and ankle–plantar-flexor and -dorsiflexor strength (Nm/kg). Results: The ACL-injured participants demonstrated greater hip-extensor (percentage difference = 19.7, F1,14 = 7.28, P = .02) and -adductor (percentage difference = 16.3, F1,14 = 6.15, P = .03) weakness preoperatively than postoperatively, regardless of limb, and greater postoperative hip-adductor strength (percentage difference = 29.0, F1,28 = 10.66, P = .003) than control participants. Knee-extensor and -flexor strength were lower in the injured than in the uninjured limb preoperatively and postoperatively (extensor percentage difference = 34.6 preoperatively and 32.6 postoperatively, t14 range = −4.59 to −4.23, P ≤ .001; flexor percentage difference = 30.6 preoperatively and 10.6 postoperatively, t14 range = −6.05 to −3.24, P < .05) with greater knee-flexor (percentage difference = 25.3, t14 = −4.65, P < .001) weakness preoperatively in the injured limb of ACL-injured participants. The ACL-injured participants had less injured limb knee-extensor (percentage difference = 32.0, t28 = −2.84, P = .008) and -flexor (percentage difference = 24.0, t28 = −2.44, P = .02) strength preoperatively but not postoperatively (extensor: t28 = −1.79, P = .08; flexor: t28 = 0.57, P = .58) than control participants. Ankle–plantar-flexor weakness was greater preoperatively than postoperatively in the ACL-injured limb (percentage difference = 31.9, t14 = −3.20, P = .006). Conclusions: The ACL-injured participants presented with hip-extensor, -adductor, and ankle–plantar-flexor weakness that appeared to be countered during postoperative rehabilitation. Our results confirmed previous findings suggesting greater knee-extensor and -flexor weakness postoperatively in the injured limb than the uninjured limb. The knee extensors and flexors are important dynamic stabilizers; weakness in these muscles could impair knee joint stability. Improving rehabilitation strategies to better target this lingering weakness seems imperative. Verf.-Referat
L2  - https://dx.doi.org/10.4085/1062-6050-48.3.23
DO  - 10.4085/1062-6050-48.3.23
SP  - S. 610-620
SN  - 1062-6050
JO  - Journal of athletic training
IS  - 5
VL  - 48
M3  - Gedruckte Ressource
ID  - PU201311007772
ER  -