Effects of Side-stepping with Reformer on Hip Abductor Muscle Activation

2021 ◽  
Vol 1 (2) ◽  
pp. 26-33
Author(s):  
Eun-Joo Jung ◽  
Min-Joo Ko ◽  
Won-Jeong Jeong ◽  
Duk-Hyun An
Keyword(s):  
Muscle Activation ◽  
Abductor Muscle ◽  
Hip Abductor

scholarly journals Resisted Side Stepping: The Effect of Posture on Hip Abductor Muscle Activation

2015 ◽  
Vol 45 (9) ◽  
pp. 675-682 ◽  
Author(s):  
Justin W. Berry ◽  
Theresa S. Lee ◽  
Hanna D. Foley ◽  
Cara L. Lewis
Keyword(s):  
Muscle Activation ◽  
Abductor Muscle ◽  
Hip Abductor

Hip Abductor Muscle Force

1965 ◽  
Vol 47 (3) ◽  
pp. 462-476 ◽  
Author(s):  
ALAN C. MERCHANT
Keyword(s):  
Muscle Force ◽  
Abductor Muscle ◽  
Hip Abductor

scholarly journals Changes in Knee Biomechanics After a Hip-Abductor Strengthening Protocol for Runners With Patellofemoral Pain Syndrome

2011 ◽  
Vol 46 (2) ◽  
pp. 142-149 ◽  
Author(s):  
Reed Ferber ◽  
Karen D. Kendall ◽  
Lindsay Farr
Keyword(s):  
Muscle Strength ◽  
Knee Joint ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Genu Valgum ◽  
Abductor Muscle ◽  
Muscle Strengthening ◽  
Peak Knee ◽  
Hip Abductor

Abstract Context: Very few authors have investigated the relationship between hip-abductor muscle strength and frontal-plane knee mechanics during running. Objective: To investigate this relationship using a 3-week hip-abductor muscle-strengthening program to identify changes in strength, pain, and biomechanics in runners with patellofemoral pain syndrome (PFPS). Design: Cohort study. Setting: University-based clinical research laboratory. Patients or Other Participants: Fifteen individuals (5 men, 10 women) with PFPS and 10 individuals without PFPS (4 men, 6 women) participated. Intervention(s): The patients with PFPS completed a 3-week hip-abductor strengthening protocol; control participants did not. Main Outcome Measure(s): The dependent variables of interest were maximal isometric hip-abductor muscle strength, 2-dimensional peak knee genu valgum angle, and stride-to-stride knee-joint variability. All measures were recorded at baseline and 3 weeks later. Between-groups differences were compared using repeated-measures analyses of variance. Results: At baseline, the PFPS group exhibited reduced strength, no difference in peak genu valgum angle, and increased stride-to-stride knee-joint variability compared with the control group. After the 3-week protocol, the PFPS group demonstrated increased strength, less pain, no change in peak genu valgum angle, and reduced stride-to-stride knee-joint variability compared with baseline. Conclusions: A 3-week hip-abductor muscle-strengthening protocol was effective in increasing muscle strength and decreasing pain and stride-to-stride knee-joint variability in individuals with PFPS. However, concomitant changes in peak knee genu valgum angle were not observed.

scholarly journals Abductor muscle strength deficit in patients after total hip arthroplasty for hip osteoarthritis: a protocol for a systematic review and meta-analysis

BMJ Open ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. e035413
Author(s):  
Petros Ismailidis ◽  
Peter Kvarda ◽  
Werner Vach ◽  
Christian Appenzeller-Herzog ◽  
Annegret Mündermann
Keyword(s):  
Muscle Strength ◽  
Hip Osteoarthritis ◽  
Publication Date ◽  
Review Author ◽  
Sufficient Information ◽  
Cochrane Central Register ◽  
Abductor Muscle ◽  
Total Hip ◽  
Hip Abductor ◽  
Abductor Strength

IntroductionConservation of abductor muscle strength is directly associated with physical function after total hip replacement (THA). Although many studies have tried to explore and quantify a potential abductor muscle strength deficit after THA as well as identify possible causes and treatment options, this topic has not been addressed systematically.Methods and analysisHuman-based studies reporting measurements of hip abductor strength will be included in this review. Studies reporting on hip abductor strength measured manually or isometric measurements at an abduction angle other than 0° will not be considered. No restriction will be placed on study design, publication date operative approach, prosthesis design, age and sex of the patients or severity of OA. Data sources will be Embase via embase.com, Medline ALL via Ovid and the Cochrane Central Register of Controlled Trials. The preliminary search was conducted on 5 May 2019. Data regarding absolute values or torque ratio of hip abductor torque between sides as well as patient demographic data, surgical approaches and rehabilitation protocols will be extracted. The assessment of quality and risk of bias will be performed with the modified Newcastle-Ottawa Scale. The screening, data extraction and quality assessment will be performed by two reviewers independently. Where necessary, a third review author will make a final judgement. Narrative synthesis as well as tabular presentation of the extracted data will be included. Whenever possible, metaregression and subgroup specific meta-analyses will be used to investigate the influence of time since THA and type of measurement (isokinetic or isometric) on the different outcomes. In case of sufficient information, these analyses will be extended to include characteristics such as age, sex, surgical approach or rehabilitation programme.Ethics and disseminationNo ethics approval is required. The results will be disseminated through peer-reviewed publications and conference presentations.PROSPERO registration numberCRD42020153185.

P20: Describing the influences of hip abductor muscle weakness on gait parameters in healthy individuals

2017 ◽  
Vol 57 ◽  
pp. 225-226
Author(s):  
Shavkat Kuchimov ◽  
N Ekin Akalan ◽  
Fatma Bastug ◽  
Duygu Dalgic ◽  
Kubra Bekdemir ◽  
...  
Keyword(s):  
Muscle Weakness ◽  
Healthy Individuals ◽  
Abductor Muscle ◽  
Gait Parameters ◽  
Hip Abductor

scholarly journals Sex Difference in Hip Adduction during Running: Influence of Hip Abductor Strength, Activation, and Pelvis & Femur Morphology

2021 ◽  
Author(s):  
Jia Liu ◽  
Kristi L. Lewton ◽  
Patrick M. Colletti ◽  
Christopher M. Powers
Keyword(s):  
Sex Differences ◽  
Femoral Neck ◽  
Muscle Activation ◽  
Femoral Anteversion ◽  
Femur Length ◽  
Computed Tomography Scanning ◽  
Hip Abductor ◽  
Independent Variable ◽  
Tomography Scanning ◽  
Abductor Strength

Purpose: To examine the influence of hip abductor strength, neuromuscular activation, and pelvis & femur morphology in contributing to sex differences in hip adduction during running.Methods: Fifteen female and 14 male runners underwent strength testing, instrumented overground running (e.g., kinematics and muscle activation), and computed tomography scanning of pelvis and femur. Morphologic measurements included bilateral hip width to femur length ratio, acetabulum abduction, acetabulum anteversion, femoral anteversion, and femoral neck-shaft angles. Sex differences for all variables were examined using independent t-tests. Linear regression was used to assess the ability of each independent variable of interest to predict peak hip adduction during the late swing and stance phase of running. Results: Compared to males, females exhibited significantly greater peak hip adduction during both late swing (8.5 ± 2.6° vs 6.2 ± 2.8°, p = 0.04) and stance phases of running (13.4 ± 4.2° vs 10.0 ± 3.2°, p = 0.02). In addition, females exhibited significantly lower hip abductor strength (1.8 ± 0.3 vs 2.0 ± 0.3 Nm/kg, p=0.04), greater femoral neck-shaft angles (134.1 ± 5.0° vs 129.9 ± 4.1°, p=0.01), and greater hip width to femur length ratios than males (0.44 ± 0.02 vs 0.42 ± 0.03, p=0.03). Femoral anteversion was the only significant predictor of peak hip adduction during late swing (r=0.36, p=0.05) and stance (r=0.41, p=0.03).Conclusion: Our findings highlight the contribution of femur morphology as opposed to hip abductor strength and activation in contributing to hip adduction during running.

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