Significance of the Single-Legged Hop Test to the Anterior Cruciate Ligament-Reconstructed Knee in Relation to Muscle Strength and Anterior Laxity

1998 ◽  
Vol 26 (3) ◽  
pp. 384-388 ◽  
Author(s):  
Ichiro Sekiya ◽  
Takeshi Muneta ◽  
Takashi Ogiuchi ◽  
Kazuyoshi Yagishita ◽  
Haruyasu Yamamoto
Keyword(s):  
Anterior Cruciate Ligament ◽  
Muscle Strength ◽  
Cruciate Ligament ◽  
Quadriceps Muscle ◽  
Strength Recovery ◽  
Anterior Laxity ◽  
Hop Test ◽  
Anterior Cruciate ◽  
Knee Muscle ◽  
The Relationship

We investigated the significance of the single-legged hop test to the anterior cruciate ligament-reconstructed knee as it specifically relates to knee muscle strength recovery and residual anterior laxity. The hop test was conducted on 107 patients with unilateral anterior cruciate ligament-reconstructed knees (78 semitendinosus tendon autografts and 29 bone-patellar tendon-bone autografts). Patients were tested an average of 2 years after surgery. Correlation coefficient analyses determined whether the relationship between knee muscle strength recovery and the hop test was invariant across all levels of residual anterior laxity and whether the relationship between residual anterior laxity and the hop test was invariant across levels of quadriceps muscle strength recovery. Furthermore, we examined the effect of graft harvest site on the hop index. Positive correlations were found between the hop index and muscle strength index at all levels of residual anterior laxity (P 0.05), but these correlation coefficients were relatively low. There were no apparent correlations between the hop index and residual anterior laxity at all levels of quadriceps muscle strength recovery. There was no significant difference in the average hop index between the semitendinosus tendon autograft group and the bone-patellar tendon-bone autograft group.

Comparison of Clinical and Dynamic Knee Function in Patients with Anterior Cruciate Ligament Deficiency

2003 ◽  
Vol 31 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Rohita R. Patel ◽  
Debra E. Hurwitz ◽  
Charles A. Bush-Joseph ◽  
Bernard R. Bach ◽  
Thomas P. Andriacchi
Keyword(s):  
Anterior Cruciate Ligament ◽  
Muscle Strength ◽  
Cruciate Ligament ◽  
Knee Laxity ◽  
Quadriceps Muscle ◽  
Stair Climbing ◽  
Hamstring Muscle ◽  
Flexion Moment ◽  
Anterior Cruciate ◽  
Normal Strength

Background Whether passive measures of isokinetic muscle strength deficits and knee laxity are related to the dynamic function of the anterior cruciate ligament-deficient knee remains unclear. Hypotheses Arthrometer measurements are not predictive of peak external knee flexion moment (net quadriceps muscle moment), isokinetic quadriceps muscle strength correlates with peak external knee flexion moment (net quadriceps muscle moment), and isokinetic hamstring muscle strength correlates with peak external knee extension moment (net flexor muscle moment). Study Design Cross-sectional study. Methods Gait analysis was used to assess dynamic function during walking, jogging, and stair climbing in 44 subjects with unilateral anterior cruciate ligament deficiency and 44 control subjects. Passive knee laxity and isokinetic quadriceps and hamstring muscle strength were also measured. Results Arthrometer measurements did not correlate with peak external flexion or extension moments in any of the activities tested or with isokinetic quadriceps or hamstring muscle strength. Test subjects also had a significantly reduced peak external flexion moment during all three jogging activities and stair climbing compared with the control subjects and this was correlated with significantly reduced quadriceps muscle strength. Conclusions Absolute knee laxity difference did not correlate with dynamic knee function as assessed by gait analysis and should not be used as a sole predictor for the outcome of treatment. Patients with greater than normal strength in the anterior cruciate ligament-deficient limb performed low- and high-stress activities in a more normal fashion than those with normal or less-than-normal strength.

scholarly journals Physiotherapy and Electrical Stimulation Effects on Strength of M. Quadriceps, Knee Range of Motion and Pain in Patients Following Anterior Cruciate Ligament Operation

2019 ◽  
Vol 1 (16) ◽  
Author(s):  
Justina Marčiulionytė ◽  
Justinas Škikas ◽  
Saulė Sipavičienė
Keyword(s):  
Anterior Cruciate Ligament ◽  
Electrical Stimulation ◽  
Muscle Strength ◽  
Range Of Motion ◽  
Cruciate Ligament ◽  
Quadriceps Muscle ◽  
Control Group ◽  
Study Group ◽  
Quadriceps Muscle Strength ◽  
Anterior Cruciate

Background. Research aim was to analyze the quadriceps muscle strength recovery after anterior cruciate ligament reconstruction using electrical stimulation and physical therapy. Methods. There were two randomly selected groups, with eight people in each group. The selection criteria were that the subjects had to have anterior cruciate ligament operation six weeks prior and were very active physically. One group was for research (study group), the other one for reference (control group). The study group had electrical stimulation combined with physical therapy exercises two times a week, for 45 minutes. The control group had exercises to strengthen the quadriceps muscle also two times a week, for 45 minutes. Both groups were tested before and after the research. The things evaluated during the test were – visual pain scale (VAS) scores, quadriceps muscle strength during extension and flexion using (R. Lovett) scoring system and goniometry showing degrees of extension and flexion. Results. Comparing both study and control groups, there was statistically signifcant improvement (p < 0.05), however the study group recovered faster and had statistically greater benefts. Conclusions. After 6 weeks of physiotherapy, the range of motion, quadriceps muscle strength increased and pain decreased in the operated leg. 1. After 6 weeks of physiotherapy and electrical stimulation, the range of motion, quadriceps muscle strength increased and pain decreased in the operated leg. 2. After 6 weeks of physiotherapy and electrical stimulation, the range of motion, quadriceps muscle strength, pain in the operated leg changed more in the study group than in subjects who received only physical therapy.Keywords: anterior cruciate ligament, electrical stimulation, quadriceps muscle, ligament reconstruction, muscle strength.

scholarly journals Michigan Initiative for Anterior Cruciate Ligament Rehabilitation (MiACLR): A Protocol for a Randomized Clinical Trial

2020 ◽  
Vol 100 (12) ◽  
pp. 2154-2164
Author(s):  
Kazandra Rodriguez ◽  
Steven A Garcia ◽  
Cathie Spino ◽  
Lindsey K Lepley ◽  
Yuxi Pang ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Anterior Cruciate Ligament ◽  
Muscle Strength ◽  
Cruciate Ligament ◽  
Quadriceps Muscle ◽  
Quadriceps Strength ◽  
Neurological Deficits ◽  
Secondary Outcome ◽  
Patient Reported ◽  
Anterior Cruciate

Abstract Objective Restoring quadriceps muscle strength following anterior cruciate ligament reconstruction (ACLR) may prevent the posttraumatic osteoarthritis that affects over 50% of knees with ACLR. However, a fundamental gap exists in our understanding of how to maximize muscle strength through rehabilitation. Neurological deficits and muscle atrophy are 2 of the leading mechanisms of muscle weakness after ACLR. High-intensity neuromuscular electrical stimulation (NMES) and eccentric exercise (ECC) have been shown to independently target these mechanisms. If delivered in succession, NMES and then ECC may be able to significantly improve strength recovery. The objectives of this study were to evaluate the ability of NMES combined with ECC to restore quadriceps strength and biomechanical symmetry and maintain cartilage health at 9 and 18 months after ACLR. Methods This study is a randomized, double-blind, placebo-controlled, single-center clinical trial conducted at the University of Michigan. A total of 112 participants between the ages of 14 and 45 years and with an anterior cruciate ligament rupture will be included. Participants will be randomly assigned 1:1 to NMES combined with ECC or NMES placebo combined with ECC placebo. NMES or NMES placebo will be delivered 2 times per week for 8 weeks beginning 10 to 14 days postoperatively and will be directly followed by 8 weeks of ECC or ECC placebo delivered 2 times per week. The co-primary endpoints are change from baseline to 9 months and change from baseline to 18 months after ACLR in isokinetic quadriceps strength symmetry. Secondary outcome measures include isometric quadriceps strength, quadriceps activation, quadriceps muscle morphology (cross-sectional area), knee biomechanics (sagittal plane knee angles and moments), indexes of patient-reported function, and cartilage health (T1ρ and T2 relaxation time mapping on magnetic resonance imaging). Impact The findings from this study might identify an intervention capable of targeting the lingering quadriceps weakness after ACLR and in turn prevent deterioration in cartilage health after ACLR, thereby potentially improving function in this patient population.

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