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• W3040807141 abstract "PURPOSE: To evaluate the recovery of knee extension and flexion strength after anterior cruciate ligament reconstruction (ACLR) and to identify the factors affecting knee strength at 6 months after ACLR. METHODS: Thirty-seven patients [31 male, 6 female; age: 22.8±8.0 years, body mass index (BMI): 22.4±4.1 kg/m2] who underwent ACLR with hamstring tendon autograft were included in this study. The patients attended a standardized rehabilitation program after surgery. Isokinetic concentric strength of the quadriceps and hamstring muscles at 60°/s were performed pre-operatively and at 3, and 6 months post-operatively. The quadriceps strength index (QSI) and hamstring strength index (HSI) were calculated by normalizing the peak torque of the involved leg with the uninvolved leg. Repeated-measures ANOVA was used to evaluate strength changes over time. The multiple linear regression analysis was used to identify independent predictors (age, BMI, preoperative knee muscle strength) of QSI and HSI at 6 months after surgery. RESULTS: For the QSI, significant differences were identified among the time points (F(2,44)=9.72, p<0.001). Quadriceps strength was greater at 6 months when compared with pre-operatively and (p<0.001) and at 3 months post-operatively (p<0.001). For the HSI, significant differences were identified among the time points (F(2,44)=4.27, p=0.03). Hamstring muscle strength was significantly lower at 3 months post-operatively when compared with pre-operatively (p<0.001) and it was greater at 6 months when compared with 3 months post-operatively (p<0.001). At 6 months after ACLR, 40.5% of participants demonstrated greater than 90% for QSI, 48.6% demonstrated greater than 90% for HSI. The multiple linear regression analysis showed that the age and BMI were associated with the QSI (p<0.001, R2=0.47) but not associated with HSI at 6 months after surgery. CONCLUSION: This study showed that there was a gradual increase in quadriceps strength from preoperative to 6 months after ACLR. However, hamstring strength decreased at 3 months post-operatively and reached preoperative level at 6 months after ACLR. The most important finding of this study was that younger age and lower body mass index were related with better quadriceps strength at 6 months after surgery." @default.
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• W3040807141 date "2020-07-01" @default.
• W3040807141 modified "2023-09-26" @default.
• W3040807141 title "Knee Strength Recovery And Factors Affecting Knee Strength After Anterior Cruciate Ligament Reconstruction" @default.
• W3040807141 doi "https://doi.org/10.1249/01.mss.0000683880.22628.10" @default.
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