1,558 results match your criteria hip extensor


Force-velocity-power profiling of maximal effort sprinting, jumping and hip thrusting: Exploring the importance of force orientation specificity for assessing neuromuscular function.

J Sports Sci 2021 May 6:1-8. Epub 2021 May 6.

Institute for Nutrition, Exercise and Sports, Department of Integrative Physiology, University of Copenhagen, Copenhagen, Denmark.

Comprehensive information regarding neuromuscular function, as assessed through force-velocity-power (FVP) profiling, is of importance for training optimization in athletes. However, neuromuscular function is highly task-specific, potentially governed by dissimilarity of the overall orientation of forceapplication. The hip thrust (HT) exercise is thought to be of relevance for sprinting considering its antero-posterior force orientation and considerable hip-extensor recruitment, however, the association between their respective FVP profiles remains unexplored. Read More

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Exercise in patients with hip osteoarthritis - effects on muscle and functional performance: A randomized trial.

Physiother Theory Pract 2021 May 6:1-12. Epub 2021 May 6.

Department of Physical and Occupational Therapy, Copenhagen University Hospital - Bispebjerg Frederiksberg, Copenhagen NV, Denmark.

: It is believed that clinical management of osteoarthritis should address muscle weakness to improve physical function and prevent disability and frailty.: This sub-study investigated the effects of supervised progressive resistance training (RT), supervised Nordic Walking (NW), and unsupervised home-based exercise (HBE) on muscle and functional performance; and associations between these exercise-induced changes in persons with hip osteoarthritis.: Forty-two patients with hip osteoarthritis were recruited from a larger RCT (NCT01387867). Read More

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Efficacy of lateral stair walking training in patients with chronic stroke: A pilot randomized controlled study.

Gait Posture 2021 Apr 20;88:10-15. Epub 2021 Apr 20.

Department of Physical Medicine and Rehabilitation, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan. Electronic address:

Background: Patients with chronic stroke have reduced capacity for performing activities of daily living (ADLs) and are at increased risk for falls during walking due to long-term changes to muscle tone and force, as well as movement control.

Research Question: To investigate the efficacy of lateral stair walking training on muscle strength of affected lower extremities, balance, ADLs, and gait ability in patients with chronic stroke.

Methods: The experimental group received 15 min of lateral stair walking exercise along with 15 min of traditional physiotherapy, whereas the control group received only traditional physiotherapy for 30 min. Read More

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Neuromechanics of Middle-Distance Running Fatigue: A Key Role of the Plantar Flexors?

Med Sci Sports Exerc 2021 May 1. Epub 2021 May 1.

School of Sport, Exercise and Health Sciences, Loughborough University, Leicestershire, United Kingdom English Institute of Sport, EIS Performance Centre, Loughborough University, Loughborough, United Kingdom.

Identifying the neuromechanical changes during high-intensity running to fatigue may highlight the biomechanical limitations to performance and indicate mitigation/training strategies.

Purpose: To investigate the changes in lower limb kinematics, kinetics and muscle activation during a high-intensity run to fatigue (HIRF).

Methods: 18 male and female competitive middle-distance runners performed a HIRF on an instrumented treadmill at a constant, but unsustainable middle-distance speed (~3 min) based on a preceding maximum oxygen uptake (V[Combining Dot Above]O2max) test. Read More

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Association of Chronic Pain with Radiologic Severity and Central Sensitization in Hip Osteoarthritis Patients.

J Pain Res 2021 22;14:1153-1160. Epub 2021 Apr 22.

Faculty of Rehabilitation, Kobe Gakuin University Graduate School, Kobe, Hyogo, Japan.

Purpose: Pain and joint deformity are the most common symptoms of hip osteoarthritis (OA). However, no significant association between pain and severity of radiographic lesions has been reported. Recently, central sensitization has been suggested as an underlying mechanism of pain in OA. Read More

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[Effect of rehabilitation robot rehabilitation training synchronizing acupuncture exercise therapy on postoperative rehabilitation with hip fracture].

Zhongguo Zhen Jiu 2021 Apr;41(4):387-90

Department of Acupuncture and Moxibustion, First Affiliated Hospital of Guangzhou University of CM, Guangzhou 510405, Guangdong Province.

Objective: To compare the therapeutic effect between rehabilitation robot rehabilitation training synchronizing acupuncture exercise therapy and simple acupuncture exercise therapy on lower limb function and life activity ability for postoperative patients with hip fracture.

Methods: A total of 50 elderly postoperative patients with hip fracture were randomly divided into an observation group and a control group, 25 cases in each group. Both groups were treated with acupuncture at hip three points of the affected side and lateral line 1 of vertex, anterior oblique parietotemporal line of the healthy side, hip three needles were retained for 30 min. Read More

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Hip and Knee Extensor Activation During the Hip Thrust and Rear-Foot-Elevated Split Squat in Trained Females.

J Strength Cond Res 2021 May;35(5):1201-1207

Department of Health and Human Performance, Texas State University, San Marcos, TX.

Abstract: McCurdy, K, Walker, J, Kelly, C, and Polinski, M. Hip and knee extensor activation during the hip thrust and rear-foot-elevated split squat in trained females. J Strength Cond Res 35(5): 1201-1207, 2021-The aim of the study was to compare hip and knee extensor muscle activation between the hip thrust (HT) and rear-foot-elevated split squat (RFESS) within different depths and the entire range of motion. Read More

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Effects of back extensor and hip abductor fatigue on dynamic postural stability in patients with nonspecific chronic low back pain: A case-control study.

Physiother Theory Pract 2021 Apr 21:1-9. Epub 2021 Apr 21.

Musculoskeletal Rehabilitation Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Khuzestan, Iran.

Introduction: Patients with nonspecific chronic low back pain (NSCLBP) complain of pain and fatigue during functional activities. Poor back muscle endurance has been associated with recurrent pain and long-term disability. However, the relationship between proximal muscle fatigue and postural stability is not well understood. Read More

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Longitudinal study of knee load avoidant movement behavior after total knee arthroplasty with recommendations for future retraining interventions.

Knee 2021 Apr 16;30:90-99. Epub 2021 Apr 16.

University of Montana, School of Physical Therapy & Rehabilitation Science, Missoula, MT, United States. Electronic address:

Background: This study aimed to evaluate clinical and biomechanical changes in self-report survey, quadriceps strength and gait analysis over 3- and 6-months post-total knee arthroplasty (TKA) and confirm the immediate effects of two forms of kinetic biofeedback on improving inter-limb biomechanics during a physically demanding decline walking task.

Methods: Thirty patients with unilateral TKA underwent testing at 3- and 6-months following surgery. All underwent self-report survey, quadriceps strength and gait analysis testing. Read More

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Levodopa facilitates improvements in gait kinetics at the hip, not the ankle, in individuals with Parkinson's disease.

J Biomech 2021 Mar 24;121:110366. Epub 2021 Mar 24.

Applied Neuromechanics Laboratory, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, USA.

Parkinson's disease symptoms impair gait, limit mobility, and reduce independence. Levodopa improves muscle activation, strength, and coordination; thus, facilitating increased step length, but few studies have evaluated the underlying forces associated with medication-induced gait improvements. Here, we assess the effects of levodopa on gait kinetics in persons with Parkinson's disease. Read More

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Effects of dual tasks on kinematic and kinetic performances during stair descent: Respective effects of manual and cognitive tasks.

J Sports Med Phys Fitness 2021 Apr 19. Epub 2021 Apr 19.

Shandong Sport University, Jinan, China -

Background: Stair descent is one of the most common and challenging daily activities for several populations, particularly under dual-task conditions. This study investigated the effects of cognitive or manual task on kinematics and kinetics during stair descent.

Methods: A total of 37 participants performed stair descent under three conditions: stair descending only, stair descending while performing a cognitive task and stair descending while performing a manual task. Read More

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Optimizing the Femoral Offset for Restoring Physiological Hip Muscle Function in Patients With Total Hip Arthroplasty.

Front Bioeng Biotechnol 2021 30;9:645019. Epub 2021 Mar 30.

School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China.

Objective: Femoral offset (FO) restoration is significantly correlated with functional recovery following total hip arthroplasty (THA). Accurately assessing the effects of FO changes on hip muscles following THA would help improve function and optimize functional outcomes. The present study aimed to (1) identify the impact of FO side difference on the hip muscle moment arms following unilateral THA during gait and (2) propose the optimal FO for a physiological hip muscle function. Read More

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Kinematic and Kinetic Predictors of Y-Balance Test Performance.

Int J Sports Phys Ther 2021 Apr 2;16(2):371-380. Epub 2021 Apr 2.

Montana State University.

Background: The Y-Balance Test (YBT) assesses dynamic stability and neuromuscular control of the lower extremity. Several authors have analyzed kinematic predictors of YBT performance with conflicting results, but the influence of kinetic factors is not well understood.

Purpose: To examine kinematic predictors of YBT performance and determine the joint kinetics which predict YBT performance. Read More

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Total Knee Arthroplasty in Spondyloepiphyseal Dysplasia with Irreducible Congenital Dislocation of the Patella: Case Report and Literature Review.

Ther Clin Risk Manag 2021 30;17:275-283. Epub 2021 Mar 30.

Department of Orthopedic Surgery, Charles University, Faculty of Medicine in Hradec Kralove, Hradec Kralove, Czech Republic.

Background: Spondyloepiphyseal dysplasia is the clinical term applied to a group of rare genetic disorders with primary involvement of the vertebrae and epiphyses, predisposing the afflicted individuals toward the premature development of osteoarthritis. There are few reports concerning joint replacement therapy in these patients, particularly describing the role of total hip arthroplasty. In this report, we describe the anatomical and technical aspects of spondyloepiphyseal dysplasia that must be considered during surgical planning and performance of total knee arthroplasty. Read More

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Effects of attaching elastic bands to the waist and heels on drop jumps.

Eur J Sport Sci 2021 Apr 9:1-25. Epub 2021 Apr 9.

Department of Physical Education and Kinesiology, National Dong Hwa University, Hualien, Taiwan.

This study aimed to investigate the effects of the external load of elastic bands attached to the waist and heels to enhance the pre-activation of leg extensor muscles on drop jumps (DJs). Twelve male college athletes volunteered for this study. Eight cameras and two force platforms were used to collect data. Read More

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Muscle size of individual hip extensors in sprint runners: Its relation to spatiotemporal variables and sprint velocity during maximal velocity sprinting.

PLoS One 2021 5;16(4):e0249670. Epub 2021 Apr 5.

Faculty of Health and Sports Science, Doshisha University, Kyoto, Japan.

Hip extensor muscle size is related to sprint running performance. However, the mechanisms underlying this relationship remain unclear. To gain insights into this issue, the present study examined the relationships between the individual hip extensor sizes, spatiotemporal variables (step frequency and length, and their determinants), and sprint velocity during maximal velocity sprinting. Read More

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Multi-joint biomechanics during sloped walking in patients with developmental dysplasia of the hip.

Clin Biomech (Bristol, Avon) 2021 Apr 28;84:105335. Epub 2021 Mar 28.

Program in Physical Therapy, Washington University in St. Louis School of Medicine, St. Louis, MO, USA; Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, MO, USA; Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA; Division of Biostatistics, Washington University in St. Louis, St. Louis, MO, USA; Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO, USA. Electronic address:

Background: Developmental dysplasia of the hip is characterized by abnormal acetabular and femoral geometries that alter joint loading and increase the risk of hip osteoarthritis. Current understanding of biomechanics in this population remains isolated to the hip and largely focused on level-ground walking, which may not capture the variable loading conditions that contribute to symptoms and intra-articular damage.

Methods: Thirty young adult females (15 with dysplasia) underwent gait analysis during level, 10° incline, and 10° decline walking while whole-body kinematics, ground reaction forces, and electromyography (EMG) were recorded. Read More

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Knee Extensor Muscle Strength Is More Important Than Postural Balance for Stair-Climbing Ability in Elderly Patients with Severe Knee Osteoarthritis.

Int J Environ Res Public Health 2021 03 31;18(7). Epub 2021 Mar 31.

Department of Physical Therapy, University of Valencia, 46010 Valencia, Spain.

Knee osteoarthritis is a chronic joint disease which damages articular cartilage. In its severe stages, it results in impairments in balance and muscle strength loss, which affect daily life activities such as walking or climbing stairs. This study sought to investigate associated factors with stair-climbing ability in this population, with special interest in measuring the relevance of postural balance for this task. Read More

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Gait Pattern in People with Multiple Sclerosis: A Systematic Review.

Diagnostics (Basel) 2021 Mar 24;11(4). Epub 2021 Mar 24.

Motion Analysis, Ergonomics, Biomechanics and Motor Control Laboratory (LAMBECOM), Department of Physical Therapy, Occupational Therapy, Rehabilitation and Physical Medicine, Faculty of Health Sciences, Universidad Rey Juan Carlos, Alcorcón, 28922 Madrid, Spain.

The aim of the present systematic review was to describe the gait pattern in people with multiple sclerosis (MS) by compiling the main findings obtained from studies using three-dimensional capture systems of human movement. The search was carried out in PubMed, Web of Science, Physiotherapy Evidence Database (PEDro), and the Cumulative Index to Nursing and Allied Health (CINAHL) databases. Studies that used three-dimensional gait analysis systems and that analyzed spatiotemporal, kinematic, kinetic, or electromyographic parameters, were included. Read More

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Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance.

Int J Environ Res Public Health 2021 03 3;18(5). Epub 2021 Mar 3.

Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, A-8010 Graz, Austria.

Vertical jumps are of great importance as a performance predictor for many types of sports that require speed and agility. However, to date, it is not clear if flexibility and/or the strength of the different leg muscles are determinants for countermovement jump (CMJ) performance. Therefore, the purpose of this study was to relate isometric maximum voluntary contraction (MVC) torque and the flexibility of various muscle groups of the lower body with CMJ performance. Read More

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Flexed lumbar spine postures are associated with greater strength and efficiency than lordotic postures during a maximal lift in pain-free individuals.

Gait Posture 2021 May 1;86:245-250. Epub 2021 Mar 1.

Health and Rehabilitation Research Institute, Department of Physiotherapy, Auckland University of Technology, New Zealand.

Background: Inspite of common lifting advice to maintain a lordotic posture, there is debate regarding optimal lumbar spine posture during lifting. To date, the influence of lumbar posture on trunk muscle recruitment, strength and efficiency during high intensity lifting has not been fully explored.

Research Question: How do differences in lumbar posture influence trunk extensor strength (moment), trunk muscle activity, and neuromuscular efficiency during maximal lifting?

Methods: Twenty-six healthy participants adopted three lumbar postures (maximal extension (lordotic), mid-range (flat-back), and fully flexed) in a free lifting position. Read More

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Novel Assessment of Isometric Hip Extensor Function: Reliability, Joint Angle Sensitivity, and Concurrent Validity.

J Strength Cond Res 2021 Mar 31. Epub 2021 Mar 31.

Faculty of Sport, Health and Applied Science, St Mary's University, Twickenham, London; and Imperial College, London, United Kingdom.

Abstract: Goodwin, JE and Bull, AMJ. Novel assessment of isometric hip extensor function: reliability, joint angle sensitivity, and concurrent validity. J Strength Cond Res XX(X): 000-000, 2021-Closed-chain hip extension function has not been well examined. Read More

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Influence of the Bar Position on Joint-Level Biomechanics During Isometric Pulling Exercises.

J Strength Cond Res 2021 Mar 31. Epub 2021 Mar 31.

Department of Physical Therapy, Program in Exercise Science, Marquette University, Milwaukee, Wisconsin; Department of Kinesiology & Sport Management, Texas Tech University, Lubbock, Texas; and Department of Intercollegiate Athletics, Marquette University, Milwaukee, Wisconsin.

Abstract: Ahn, N, Kim, H, Krzyszkowski, J, Roche, S, and Kipp, K. Influence of the bar position on joint-level biomechanics during isometric pulling exercises. J Strength Cond Res XX(X): 000-000, 2021-The purpose of this study was to investigate the influence of the bar position on ankle, knee, and hip net joint moments (NJMs), relative muscular effort (RME), and vertical ground reaction forces (GRFs) during isometric pulling exercises, such as the isometric midthigh pull. Read More

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Appendicular Muscle Physiology and Biomechanics in .

Integr Org Biol 2020 5;2(1):obaa038. Epub 2020 Nov 5.

Department of Comparative Biomedical Sciences, Structure and Motion Laboratory, Royal Veterinary College, North Mymms, Hawkshead Lane, Hertfordshire, AL9 7TA, UK.

Archosaurian reptiles (including living crocodiles and birds) had an explosive diversification of locomotor form and function since the Triassic approximately 250 million years ago. Their limb muscle physiology and biomechanics are pivotal to our understanding of how their diversity and evolution relate to locomotor function. Muscle contraction velocity, force, and power in extinct archosaurs such as early crocodiles, pterosaurs, or non-avian dinosaurs are not available from fossil material, but are needed for biomechanical modeling and simulation. Read More

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November 2020

A comprehensive biomechanical analysis of the barbell hip thrust.

PLoS One 2021 29;16(3):e0249307. Epub 2021 Mar 29.

Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom.

Barbell hip thrust exercises have risen in popularity within the biomechanics and strength and conditioning literature over recent years, as a method of developing the hip extensor musculature. Biomechanical analysis of the hip thrust beyond electromyography is yet to be conducted. The aim of this study was therefore to perform the first comprehensive biomechanical analysis the barbell hip thrust. Read More

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Contralateral Lower-Limb Functional Status Before Total Hip Arthroplasty: An Important Indicator for Postoperative Gait Speed.

J Bone Joint Surg Am 2021 Mar 29. Epub 2021 Mar 29.

Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan.

Background: Postoperative gait speed, especially comfortable gait speed, is an important factor for predicting function after total hip arthroplasty (THA). In this study, we examined factors related to gait speed, including preoperative lower and upper-limb functional parameters and postoperative lower-limb alignment. In addition, we examined factors related to postoperative good comfortable gait speed (≥1. Read More

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Gradual adaptation to pelvis perturbation during walking reinforces motor learning of weight shift toward the paretic side in individuals post-stroke.

Exp Brain Res 2021 Mar 29. Epub 2021 Mar 29.

Legs and Walking Lab, Shirley Ryan AbilityLab, 355 E. Erie Street, 23rd floor, Chicago, IL, 60611, USA.

The purpose of this study was to determine whether the gradual versus abrupt adaptation to lateral pelvis assistance force improves weight shift toward the paretic side and enhance forced use of the paretic leg during walking. Sixteen individuals who had sustained a hemispheric stroke participated in two experimental sessions, which consisted of (1) treadmill walking with the application of lateral pelvis assistance force (gradual vs. abrupt condition) and (2) overground walking. Read More

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The effect of gluteus maximus tenotomy in primary total hip arthroplasty with posterior approach: Kinematic analysis of hip extensor strength.

J Orthop Surg (Hong Kong) 2021 Jan-Apr;29(1):23094990211003349

Department of Orthopedics and Traumatology, HSU Prof. Cemil Tascioglu City Hospital, Istanbul, Turkey.

Background: The posterior approach (PA) is the most commonly used surgical approach for total hip arthroplasty (THA), but the proximity of the sciatic nerve may increase the likelihood of sciatic nerve injury (SNI). Gluteus maximus tenotomy can be performed to prevent SNI because tenotomy increases the distance between the femoral neck and sciatic nerve and prevents compression of the sciatic nerve by the gluteus maximus tendon (GMT) during hip movements. We aimed to kinematically compare the postoperative hip extensor forces of patients who have and have not undergone gluteus maximus tenotomy to determine whether there is a difference in hip extensor strength. Read More

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Motor Impairment and Its Influence in Gait Velocity and Asymmetry in Community Ambulating Hemiplegic Individuals.

Arch Rehabil Res Clin Transl 2021 Mar 25;3(1):100093. Epub 2020 Nov 25.

Center for Health Research and Movement Science, College of Rehabilitation Sciences, University of Santo Tomas, Manila, Philippines.

Objectives: To determine the most important motor impairments that are predictors of gait velocity and spatiotemporal symmetrical ratio in patients with stroke.

Design: Cross-sectional, descriptive analysis study.

Setting: Human performance laboratory of the University of Santo Tomas. Read More

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