scholarly journals 155 Clinically-oriented assessments of hamstring muscle strength are reliable

2021 ◽  
Author(s):  
Ellevyn Irwin ◽  
Grainne O’Callaghan ◽  
Aine Tunney ◽  
Eamonn Delahunt ◽  
Ulrik McCarthy Persson
Keyword(s):  
Muscle Strength ◽  
Hamstring Muscle

scholarly journals Effects of whole-body vibration on quadriceps and hamstring muscle strength, endurance, and power in children with hemiparetic cerebral palsy: a randomized controlled study

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Rania G. Hegazy ◽  
Amr Almaz Abdel-aziem ◽  
Eman I. El Hadidy ◽  
Yosra M. Ali
Keyword(s):  
Cerebral Palsy ◽  
Physical Therapy ◽  
Muscle Strength ◽  
Whole Body Vibration ◽  
Whole Body ◽  
Controlled Study ◽  
Control Group ◽  
Hamstring Muscle ◽  
Post Intervention ◽  
Body Vibration

Abstract Background Hemiplegic cerebral palsy (CP) enormously affects the quadriceps and hamstring muscles. It causes weakness in the affected lower-extremity muscles in addition to muscle imbalance and inadequate power production, especially in the ankle plantar-flexor and knee extensor muscles. It also causes anomalous delayed myoelectrical action of the medial hamstring. A whole-body vibration (WBV) exercise can diminish muscle spasticity and improve walking speed, muscle strength, and gross motor function without causing unfavorable impacts in adults suffering from CP. Thus, the aim of this study is to investigate the impacts of WBV training associated with conventional physical therapy on the quadriceps and hamstring muscle strength, endurance, and power in children with hemiparetic CP. Results The post-intervention values of the quadriceps and hamstring muscle force, endurance, and power were significantly higher than the pre-intervention values for both groups (p = 0.001). The post-intervention values of the study group were significantly higher than the control group (quadriceps force, p = 0.015; hamstring force, p = 0.030; endurance, p = 0.025; power, p = 0.014). Conclusion The 8 weeks of WBV training that was added to traditional physical therapy was more successful in improving the quadriceps and hamstring muscle strength, endurance, and power in children with hemiparetic CP when compared to traditional physical therapy alone.

scholarly journals Device and method matter: A critical evaluation of eccentric hamstring muscle strength assessments

2019 ◽  
Vol 30 (2) ◽  
pp. 217-226 ◽  
Author(s):  
Hans‐Peter Wiesinger ◽  
Christoph Gressenbauer ◽  
Alexander Kösters ◽  
Manuel Scharinger ◽  
Erich Müller
Keyword(s):  
Muscle Strength ◽  
Critical Evaluation ◽  
Hamstring Muscle

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 The Effect of 8-Week Nordic Hamstring Exercise on Hamstring Quadriceps Ratio and Hamstring Muscle Strength

2018 ◽  
Vol 8 (3) ◽  
pp. 162
Author(s):  
Zait Burak Aktuğ ◽  
Ali Kerim Yılmaz ◽  
Serkan İbiş ◽  
Hasan Aka ◽  
Cengiz Akarçeşme ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Exercise Group ◽  
Wilcoxon Test ◽  
Soccer Players ◽  
Control Group ◽  
Hamstring Muscle ◽  
Post Test ◽  
Angular Velocities ◽  
Soccer Training ◽  
Knee Muscle

The aim of the study is to investigate the effect of 8-week Nordic Hamstring (NH) exercise on hamstring/quadricepsratio (H/Q) and hamstring muscle strength. 22 amateur soccer players participated in the study. Soccer players weredivided into two groups: the control group (CG) (n = 11) who only practiced soccer training and the NordicHamstring exercise group (NHEG) (n = 11) who performed NH in addition to soccer training. The isokinetic kneemuscle strength of the soccer player was measured twice at the beginning of the study and after the 8 week NHexercise. An isokinetic dynamometer was used to determine isokinetic knee strengths of soccer players. Thedifference between pre-test and post-test results of isokinetic knee muscle strength of soccer players was determinedby Wilcoxon test. According to the results obtained, it was found that the H/Q ratio (at 180ºs-1 and 240ºs-1 angularvelocities) and hamstring muscle strength (60ºs-1, 180ºs-1 and 240ºs-1 angular velocities) increased statisticallysignificantly (p<0.05). As a result, it can be stated that NH exercise is a very important factor in achieving thedesired level of H/Q ratio, which is an important factor in increasing sportive performance and thus decreasing therisk of injury as well as increasing hamstring muscle strength.

scholarly journals Hamstring Muscle Endurance in Subjects with Prior Knee Injuries

2018 ◽  
Author(s):  
Jamie Faxon ◽  
Adeola Sanni ◽  
Kevin McCully
Keyword(s):  
Skeletal Muscle ◽  
Muscle Strength ◽  
Knee Injuries ◽  
Muscle Endurance ◽  
Hamstring Muscle ◽  
Post Injury ◽  
Knee Reconstruction ◽  
Reconstruction Surgery ◽  
Hamstring Muscles ◽  
One Year

Background: Knee joint is a common site for injury among younger people, the purpose of this study is to measure the skeletal muscle endurance and strength on people with prior knee reconstruction surgery. Methods: Young healthy female subjects were tested who reported having knee reconstruction surgery of over one year prior to testing.&nbsp; The skeletal muscle endurance index of the hamstring and quadriceps muscles was determined as the decline in the specific muscle acceleration in response to 2, 4, and 6 Hz electrical stimulation.&nbsp; Maximal isometric muscle strength (MVC) was measured in the hamstring and quadriceps muscles. Results: The hamstring muscles in the affected leg had less endurance than the non-affected leg at 6 Hz stimulation (55.5 &plusmn; 13.2% versus 78.0 &plusmn; 13.3%, P = 0.01).&nbsp; Muscle endurance was not reduced in the quadriceps muscles in the affected leg compared to the non-affected leg at 6 Hz stimulation (78.0 &plusmn; 13.3% versus 80.3 &plusmn; 10.0%, P = 0.69).&nbsp; There were no differences in MVC between the affected and non-affected legs for either the hamstring (P= 0.20) or quadriceps muscles (p = 0.67). Conclusions: Muscle endurance is reduced in the hamstring muscles at least one-year post injury, while hamstring strength is not.&nbsp; Reduced hamstring muscle endurance could be a result of a lack of focus on muscle endurance during rehabilitation after injury and may contribute to re-injury in the particular muscle even in people who have recovered muscle strength.&nbsp;&nbsp;&nbsp;

scholarly journals Effects of home confinement due to COVID‐19 pandemic on eccentric hamstring muscle strength in football players

2020 ◽  
Vol 30 (10) ◽  
pp. 2010-2012
Author(s):  
Victor Moreno‐Pérez ◽  
Juan Del Coso ◽  
Daniel Romero‐Rodríguez ◽  
Luis Marcé‐Hernández ◽  
Marcelo Peñaranda ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Football Players ◽  
Hamstring Muscle
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