Knee flexor muscle strength is related to gait performance in women with multiple sclerosis but not for healthy women

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.

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Prediction of muscle strength and postoperative function after knee flexor muscle resection for soft tissue sarcoma of the lower limbs

Orthopaedics & Traumatology Surgery & Research ◽

10.1016/j.otsr.2017.07.005 ◽

2017 ◽

Vol 103 (7) ◽

pp. 1081-1085 ◽

Cited By ~ 1

Author(s):

A. Tanaka ◽

Y. Yoshimura ◽

K. Aoki ◽

M. Okamoto ◽

M. Kito ◽

...

Keyword(s):

Soft Tissue ◽

Muscle Strength ◽

Soft Tissue Sarcoma ◽

Lower Limbs ◽

Flexor Muscle ◽

Postoperative Function ◽

Knee Flexor

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Comparison of Common Methodologies for the Determination of Knee Flexor Muscle Strength

International Journal of Sports Physical Therapy ◽

10.26603/001c.21311 ◽

2021 ◽

Author(s):

Dan I Ogborn ◽

Alix Bellemare ◽

Brittany Bruinooge ◽

Holly Brown ◽

Sheila McRae ◽

...

Keyword(s):

Muscle Strength ◽

Flexor Muscle ◽

Knee Flexor

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How do resistance training and balance and motor control training affect gait performance and fatigue impact in people with multiple sclerosis? A randomized controlled multi-center study

Multiple Sclerosis Journal ◽

10.1177/1352458519865740 ◽

2019 ◽

Vol 26 (11) ◽

pp. 1420-1432 ◽

Cited By ~ 1

Author(s):

Jacob Callesen ◽

Davide Cattaneo ◽

John Brincks ◽

Marie-Louise Kjeldgaard Jørgensen ◽

Ulrik Dalgas

Keyword(s):

Multiple Sclerosis ◽

Motor Control ◽

Resistance Training ◽

Muscle Strength ◽

Controlled Trial ◽

Step Test ◽

Control Group ◽

Gait Performance ◽

Randomized Controlled ◽

Gait Function

Background: Despite a shared purpose of improving functional capacity, the principles of progressive resistance training (PRT) and balance and motor control training (BMCT) are fundamentally different. Objectives: To investigate the effects of PRT and BMCT on gait performance and fatigue impact in people with multiple sclerosis (PwMS). Methods: A multi-center, single-blinded, cluster-randomized controlled trial with two intervention groups (PRT and BMCT) and a control group (CON). The interventions lasted 10 weeks. A total of 71 participants with impaired mobility (Timed 25-Foot Walk (T25FW) > 5 seconds or Six Spot Step Test (SSST) > 8 seconds) were enrolled. Primary outcomes were the T25FW and the SSST. Fatigue impact, self-perceived gait function, 6-minute walk, balance, and muscle strength were secondary outcomes. Results: In total, 83% completed the study. The primary comparisons showed that BMCT, but not PRT, improved T25FW, SSST, and self-perceived gait function when compared to CON. Secondary comparisons showed that BMCT improved SSST more than PRT, while T25FW did not differ. Both BMCT and PRT reduced the fatigue impact. Finally, the effect of BMCT was superior to PRT on dynamic balance, while PRT was superior to BMCT on knee extensor muscle strength. Conclusion: BMCT, but not PRT, was superior to CON in improving gait performance, while both BMCT and PRT reduced fatigue.

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Correlation between strength and flexibility of knee flexors and extensors muscles in youth soccer players

Manual Therapy Posturology & Rehabilitation Journal ◽

10.17784/mtprehabjournal.2016.14.494 ◽

2020 ◽

pp. 1-5

Author(s):

Maira Peloggia Cursino ◽

Ana Elisa Zulliani Stroppa Marques ◽

Hugo Castellon Quatrochi ◽

Flavia Roberta Faganello Navega ◽

Cristiane Rodrigues Pedroni

Keyword(s):

Muscle Strength ◽

Significant Positive Correlation ◽

Soccer Players ◽

Muscle Injuries ◽

Flexor Muscle ◽

Positive Correlation ◽

Youth Soccer ◽

Knee Flexor ◽

H:Q Ratio ◽

The Right

Introduction: Soccer is the most played sport in the world and the one that causes more injuries. Imbalance between knee flexor and extensor is the main cause of muscle injuries in soccer players. Objective: The aim of this study was to verify the asymmetry and the correlation between the strength and flexibility of knee flexor and extensor as well as the difference of these variables between the right and left limbs in youth soccer players. Method: The sample consisted of 45 male youth soccer players for at least a year, aged between 13 and 16 years (14.7+0.86). The athletes underwent an assessment of flexibility of the posterior chain through the sit and reach test on Wells’ Bench and an assessment of flexibility of the quadriceps using the Ely’s test, with measurement of passive range of motion by goniometry. The peak of muscle strength was measured using a load cell (EMG  System, Brazil). Results: Data analysis showed difference between the values obtained in the Ely’s test of right and left leg (p=0,03), which did not happen for flexion strength (p=0.45), extension (p=0.41) and H:Q ratio (p = 0.40) when comparing the two members. It was observed a significant negative correlation between the H:Q ratio and the flexibility of the posterior chain test either for the right side (r=-0.40; p=0.006) or left side (r=-0.50; p=0.0004). Also a significant positive correlation was observed between quadriceps strength and flexibility of the posterior chain, both for the right (r=0.31; p=0.03) and the left side (r=0.32; p=0.02). Just for the left side a significant positive correlation was observed when compared the flexor muscle strength with the flexibility of the quadriceps (r=0.30; p=0.03). Conclusion: We conclude from this study that the flexibility of the posterior chain may be related to the strength of the antagonists, however, when the two physical qualities were compared in the same muscles, it showed no correlation.

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Associations of the Stair Climb Power Test With Muscle Strength and Functional Performance in People With Chronic Obstructive Pulmonary Disease: A Cross-Sectional Study

Physical Therapy ◽

10.2522/ptj.20100091 ◽

2010 ◽

Vol 90 (12) ◽

pp. 1774-1782 ◽

Cited By ~ 25

Author(s):

Marc Roig ◽

Janice J. Eng ◽

Donna L. MacIntyre ◽

Jeremy D. Road ◽

W. Darlene Reid

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Muscle Strength ◽

Functional Performance ◽

Knee Extensor ◽

Chronic Obstructive ◽

Flexor Muscle ◽

Cross Sectional ◽

Obstructive Pulmonary Disease ◽

Power Test ◽

Muscle Torque

Background The Stair Climb Power Test (SCPT) is a functional test associated with leg muscle power in older people. Objective The purposes of this study were to compare the results of the SCPT in people with chronic obstructive pulmonary disease (COPD) and people who were healthy and to explore associations of the SCPT with muscle strength (force-generating capacity) and functional performance. Design The study was a cross-sectional investigation. Methods Twenty-one people with COPD and a predicted mean (SD) percentage of forced expiratory volume in 1 second of 47.2 (12.9) and 21 people who were healthy and matched for age, sex, and body mass were tested with the SCPT. Knee extensor and flexor muscle torque was assessed with an isokinetic dynamometer. Functional performance was assessed with the Timed “Up & Go” Test (TUG) and the Six-Minute Walk Test (6MWT). Results People with COPD showed lower values on the SCPT (28%) and all torque measures (∼32%), except for eccentric knee flexor muscle torque. In people with COPD, performance on the TUG and 6MWT was lower by 23% and 28%, respectively. In people with COPD, the SCPT was moderately associated with knee extensor muscle isometric and eccentric torque (r≥.46) and strongly associated (r=.68) with the 6MWT. In people who were healthy, the association of the SCPT with knee extensor muscle torque tended to be stronger (r≥.66); however, no significant relationship between the SCPT and measures of functional performance was found. Limitations The observational design of the study and the use of a relatively small convenience sample limit the generalizability of the findings. Conclusions The SCPT is a simple and safe test associated with measures of functional performance in people with COPD. People with COPD show deficits on the SCPT. However, the SCPT is only moderately associated with muscle torque and thus cannot be used as a simple surrogate for muscle strength in people with COPD.

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