Decrease of knee flexion torque in patients with ACL reconstruction: combined analysis of the architecture and function of the knee flexor muscles

2005 ◽  
Vol 14 (4) ◽  
pp. 310-317 ◽  
Author(s):  
Yukiko Makihara ◽  
Akie Nishino ◽  
Toru Fukubayashi ◽  
Akihiro Kanamori
Keyword(s):  
Acl Reconstruction ◽  
Knee Flexion ◽  
Combined Analysis ◽  
Knee Flexor ◽  
Flexor Muscles ◽  
And Function

Functional Differences Of The Knee Flexor Muscles During Eccentric Knee Flexion

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S441
Author(s):  
Takashi Ono ◽  
Akie Nishino ◽  
Noriyuki Tawara ◽  
Yuichi Hirano ◽  
Toru Okuwaki ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Knee Flexor ◽  
Functional Differences ◽  
Flexor Muscles

Functional Differences Of The Knee Flexor Muscles During Eccentric Knee Flexion

2005 ◽  
Vol 37 (Supplement) ◽  
pp. S441
Author(s):  
Takashi Ono ◽  
Akie Nishino ◽  
Noriyuki Tawara ◽  
Yuichi Hirano ◽  
Toru Okuwaki ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Knee Flexor ◽  
Functional Differences ◽  
Flexor Muscles

Differences in Damage and EMG Pattern of the Knee Flexor Muscles During Eccentric Knee Flexion

2007 ◽  
Vol 39 (Supplement) ◽  
pp. S38
Author(s):  
Takashi Ono ◽  
Jun Kubota ◽  
Megumi Araki ◽  
Noriyuki Tawara ◽  
Toru Okuwaki ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Knee Flexor ◽  
Flexor Muscles

Isokinetic Strength After ACL Reconstruction: Influence of Concomitant Anterolateral Ligament Reconstruction

2021 ◽  
pp. 194173812110054
Author(s):  
Benoit Gillet ◽  
Yoann Blache ◽  
Isabelle Rogowski ◽  
Grégory Vigne ◽  
Bertrand Sonnery-Cottet ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Ligament Reconstruction ◽  
Knee Extensor ◽  
Anterolateral Ligament ◽  
Flexor Muscle ◽  
Knee Flexor ◽  
Strength Recovery ◽  
Flexor Muscles ◽  
Knee Muscle ◽  
Knee Muscle Strength

Background: To reduce the rate of anterior cruciate ligament (ACL) graft rupture, recent surgeries have involved anterolateral ligament reconstruction (ALLR). This reconstruction procedure harvests more knee flexor muscle tendons than isolated ACL reconstruction (ACLR), but its influence on knee muscle strength recovery remains unknown. This study aimed to assess the influence of ALLR with a gracilis graft on the strength of the knee extensor and flexor muscles at 6 months postoperatively. Hypothesis: The additional amount of knee flexor harvest for ALLR would result in impairment in knee flexor muscle strength at 6 months postoperatively. Study Design: Retrospective cohort study. Level of Evidence: Level 2. Methods: A total of 186 patients were assigned to 2 groups according to the type of surgery: ACL + ALLR (graft: semitendinosus + gracilis, n = 119) or isolated ACLR (graft: semitendinosus, n = 67). The strength of the knee extensor and flexor muscles was assessed using an isokinetic dynamometer at 90, 180, and 240 deg/s for concentric and 30 deg/s for eccentric contractions and compared between groups using analysis of variance statistical parametric mapping. Results: Regardless of the surgery and the muscle, the injured leg produced significantly less strength than the uninjured leg throughout knee flexion and extension from 30° to 90° for each angular velocity (30, 90, 180, and 240 deg/s). However, the knee muscle strength was similar between the ACL + ALLR and ACLR groups. Conclusion: The addition of ALLR using the gracilis tendon during ACLR does not alter the muscle recovery observed at 6 months postoperatively. Clinical Relevance: Although more knee flexor muscle tendons were harvested in ACL + ALLR, the postoperative strength recovery was similar to that of isolated ACLR.

The Effect of Different Exercise Programs on Size and Function of Deep Cervical Flexor Muscles in Patients With Chronic Nonspecific Neck Pain

2017 ◽  
Vol 96 (8) ◽  
pp. 582-588 ◽  
Author(s):  
Somayeh Amiri Arimi ◽  
Mohammad Ali Mohseni Bandpei ◽  
Khodabakhsh Javanshir ◽  
Asghar Rezasoltani ◽  
Akbar Biglarian
Keyword(s):  
Neck Pain ◽  
Exercise Programs ◽  
Flexor Muscles ◽  
And Function

scholarly journals No Relationship Between Preoperative and Early Postoperative Strength After ACL Reconstruction

2020 ◽  
Vol 29 (5) ◽  
pp. 583-587
Author(s):  
Pier Paolo Mariani ◽  
Luca Laudani ◽  
Jacopo E. Rocchi ◽  
Arrigo Giombini ◽  
Andrea Macaluso
Keyword(s):  
Acl Reconstruction ◽  
Cruciate Ligament ◽  
Knee Extensor ◽  
Quadriceps Strength ◽  
Maximal Voluntary Isometric Contraction ◽  
Extensor Muscles ◽  
Flexor Muscles ◽  
Anterior Cruciate ◽  
Tendon Autograft ◽  
Knee Extensor Muscles

Context: All rehabilitative programs before anterior cruciate ligament (ACL) reconstructive surgery, which are focused on recovery of proprioception and muscular strength, are defined as prehabilitation. While it has shown that prehabilitation positively affects the overall outcome after ACL reconstruction, it is still controversial whether preoperatively enhancing quadriceps strength has some beneficial effect on postoperative strength, mainly during the first period. Objective: To determine whether there is any relationship between preoperative and early postoperative quadriceps strength. Design: Case control. Setting: University research laboratory. Participants: Fifty-nine males (18–33 y; age: 23.69 [0.71] y) who underwent ACL reconstruction with patellar-tendon autograft were examined the day before surgery, and at 60 and 90 days after surgery. Main Outcome Measures: The limb symmetry index (LSI) was quantified for maximal voluntary isometric contraction of the knee extensor muscles and of the knee flexor muscles at 90° joint angle. A k-means analysis was performed on either quadriceps or hamstrings LSI before surgery to classify the patients in high and low preoperative LSI clusters. Differences in postoperative LSI were then evaluated between the high and low preoperative LSI clusters. Results: Following surgery, there were no differences in the quadriceps LSI between patients with high and low preoperative quadriceps LSI. Sixty days after surgery, the hamstrings LSI was higher in patients with high than low preoperative hamstrings LSI (84.0 [13.0]% vs 75.4 [15.9]%; P < .05). Conclusions: Findings suggest that quadriceps strength deficit is related to the ACL injury and increases further after the reconstruction without any correlation between the preoperative and postoperative values. Therefore, it appears that there is no need to delay surgery in order to increase the preoperative quadriceps strength before surgery.

scholarly journals Knee strength, hop performance and self-efficacy at 4 months are associated with symmetrical knee muscle function in young athletes 1 year after an anterior cruciate ligament reconstruction

2019 ◽  
Vol 5 (1) ◽  
pp. e000504 ◽  
Author(s):  
Susanne Beischer ◽  
Eric Hamrin Senorski ◽  
Christoffer Thomeé ◽  
Kristian Samuelsson ◽  
Roland Thomeé
Keyword(s):  
Acl Reconstruction ◽  
Self Efficacy ◽  
Muscle Function ◽  
Knee Flexion ◽  
Early Stage ◽  
Knee Extension ◽  
Young Athletes ◽  
Patient Demographics ◽  
Patient Reported ◽  
Flexion Strength

ObjectivesWe investigated whether patient demographics, 4-month patient-reported outcomes (PRO) and muscle function predicted young athletes regaining symmetrical muscle function in five tests of muscle function 1 year after ACL reconstruction.MethodsWe extracted data on patient demographics, PROs and the results of five tests of muscle function from a rehabilitation-specific register. Athletes were 15–30 years of age, involved in knee-strenuous sport and had undergone a primary ACL reconstruction. The primary outcome was achieving a Limb Symmetry Index of ≥90% for the battery of tests 1 year after ACL reconstruction. Patient demographics, muscle-function data and results for PROs at the 4-month follow-up were analysed.ResultsIn all, 237 athletes (59% female; mean age 22±4 years) were included in the study. One year after ACL reconstruction, 26% (62/237) of the included athletes had achieved symmetrical muscle function. Univariable analysis showed that symmetrical muscle function was associated with present self-efficacy, OR 1.28 (95% CI 1.04 to 1.58, p=0.011), knee-extension strength, OR 1.73 (95% CI 1.28 to 2.34), knee-flexion strength, OR 1.39 (95% CI 1.07 to 1.81), vertical hop, OR 1.77 (95% CI 1.27 to 2.45), single-leg hop for distance, OR 1.98 (95% CI 1.24 to 3.17) and side hop, OR 1.64 (95% CI 1.15 to 2.33).ConclusionSymmetrical knee-extension and knee-flexion strength, a more symmetrical hop performance and higher present self-efficacy at an early stage all increased the odds of achieving symmetrical muscle function in young athletes 1 year after ACL reconstruction.

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