5,226 results match your criteria extensor strength


Voluntary and magnetically evoked muscle contraction protocol in males with Duchenne muscular dystrophy: safety, feasibility, reliability, and validity.

Muscle Nerve 2021 May 11. Epub 2021 May 11.

Division of Rehabilitation Science, Department of Rehabilitation Medicine, Medical School-University of Minnesota, Minneapolis, MN.

Introduction: Clinical trials addressing treatments for Duchenne muscular dystrophy (DMD) require reliable and valid measurement of muscle contractile function across all disease severity levels. This work aimed to evaluate a protocol combining voluntary and evoked contractions to measure strength and excitability of wrist extensor muscles, for safety, feasibility, reliability, and discriminant validity between males with DMD and controls.

Methods: Wrist extensor muscle strength and excitability were assessed in males with DMD (N=10; mean 15. Read More

View Article and Full-Text PDF

The association between knee joint muscle activation and knee joint moment patterns during walking in moderate medial compartment knee osteoarthritis: implications for secondary prevention.

Arch Phys Med Rehabil 2021 May 6. Epub 2021 May 6.

School of Biomedical Engineering, Dalhousie University, 5981 University Ave, Halifax, NS B3H 1W2, Canada; School of Physiotherapy, Dalhousie University, 5869 University Ave, Halifax, NS B3H 4R2, Canada; Affiliated Scientist Nova Scotia Health Authority, Department of Surgery, Halifax, NS B3H 3A7, Canada. Electronic address:

Objective: Determine associations between knee moment features linked to osteoarthritis (OA) progression, gait muscle activation patterns, and strength.

Design: Cross-sectional secondary analysis.

Setting: Gait laboratory. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Comparing the efficacy of continuous and pulsed ultrasound therapies in patients with lateral epicondylitis: A double-blind, randomized, placebo-controlled study.

Turk J Phys Med Rehabil 2021 Mar 4;67(1):99-106. Epub 2021 Mar 4.

Department of Physical Medicine and Rehabilitation, Eskişehir Osmangazi University, Faculty of Medicine, Eskişehir, Turkey.

Objectives: The aim of this study was to investigate the efficacy of continuous and pulsed ultrasound therapies in lateral epicondylitis.

Patients And Methods: A total of 51 patients (18 males, 33 females; mean age: 46.52±6. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Knee extensor strength, hop performance, patient-reported outcome and inter-test correlation in patients 9-12 months after anterior cruciate ligament reconstruction.

Knee 2021 Apr 30;30:176-184. Epub 2021 Apr 30.

HFRC, 117 Stirling Highway, Nedlands, Western Australia 6009, Australia.

Background: Hop performance and isokinetic knee extensor strength (IKES) asymmetry are associated with re-injury after anterior cruciate ligament reconstruction (ACLR). This study investigated deficits after ACLR, and which hop tests are most correlated with IKES and patient-reported outcome measures (PROMs).

Methods: 50 patients were assessed 9-12 months after ACLR using the International Knee Documentation Committee (IKDC) and ACL Return to Sport after Injury (ACL-RSI) scores. Read More

View Article and Full-Text PDF

The Impact of Acute and Chronic Exercise on Immunoglobulins and Cytokines in Elderly: Insights From a Critical Review of the Literature.

Front Immunol 2021 14;12:631873. Epub 2021 Apr 14.

Biomedical Research Center, Qatar University, Doha, Qatar.

The level of immunoglobulins and cytokines changes with an ageing immune system. This review summarizes findings from studies that have examined the impact of acute and chronic exercise on immunoglobulins and cytokines in the elderly. Our literature analysis revealed that acute endurance exercise resulted in increased secretory salivary immunoglobulin A (SIgA), while acute bouts of muscle strengthening exercise (i. Read More

View Article and Full-Text PDF

Performance-based physical function correlates with walking speed and distance at 3 months post unilateral total knee arthroplasty.

Gait Posture 2021 Apr 28;87:163-169. Epub 2021 Apr 28.

Department of Rehabilitation Medicine, Seoqwipo Medical Center, 47, Jangsu-ro, Jeju, 63585, Republic of Korea. Electronic address:

Background: After total knee arthroplasty (TKA), walking speed and distance are main concerns of patients.

Research Question: Which physical functions affect walking speed and distance after TKA?

Methods: Cross-sectional data from 149 patients who underwent unilateral primary TKA and completed performance-based physical function tests. Instrumental gait evaluation for spatiotemporal parameters, isometric knee extensor and flexor strength of both knees, 6-minute walk test (6MWT), timed up-and-go (TUG) test, timed stair climbing test (SCT), and knee flexion and extension range of motion (ROM) of surgical knee were examined. Read More

View Article and Full-Text PDF

Factors Affecting the Femoral Cartilage Thickness After Anterior Cruciate Ligament Reconstruction.

Indian J Orthop 2021 Apr 28;55(2):352-359. Epub 2020 Sep 28.

Department of Physical, Medicine and Rehabilitation, Faculty of Medicine, Istanbul Medipol University, TEM Avrupa Otoyolu Göztepe Çıkışı No: 1, Bagcilar, Istanbul, 34214 Turkey.

Background: This study aimed to evaluate the changes in the distal femoral cartilage thickness in patients that underwent anterior cruciate ligament reconstruction (ACLR) and to analyze their association with concomitant meniscal surgery, knee muscle strength, kinesophobia, and physical activity level.

Methods: The demographic characteristics and surgical data of 47 male patients that underwent unilateral ACLR (mean, 27.55 ± 5. Read More

View Article and Full-Text PDF

Muscle Performance Changes with Age in Active Women.

Int J Environ Res Public Health 2021 Apr 23;18(9). Epub 2021 Apr 23.

Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019, USA.

The purpose of this study was to examine age-related differences in muscle performance in women divided into young (YW, 20-39 years, = 29) middle-aged (MAW, 40-59 years, = 33), and older (OW, ≥60 years, = 40) age groups.

Methods: Hand grip strength, vertical jump performance, and knee extensor (KE) strength (0 deg/s, 60 deg/s, and 240 deg/s), speed of movement (SoM; at 1 Nm, 20%, 40%, and 60% isometric strength), and endurance (30-repetition test at 60 degs/s and 240 deg/s) were assessed. Computed tomography-acquired muscle cross-sectional area (mCSA) was measured and included to determine specific strength (KE strength/mCSA). Read More

View Article and Full-Text PDF

Individuals following anterior cruciate ligament reconstruction practice underloading strategies during daily activity.

J Orthop Res 2021 Apr 29. Epub 2021 Apr 29.

Human Performance Laboratory, Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California, USA.

Underloading the surgical limb has been described in biomechanical studies across recovery time points following anterior cruciate ligament reconstruction (ACLr). This study aimed to examine the extent to which laboratory findings translate to daily activities. Limb loading was quantified during a sit-to-stand task in laboratory testing and throughout 2 days of daily activity in 15 individuals 114. Read More

View Article and Full-Text PDF

[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

View Article and Full-Text PDF

Spontaneous index finger extensor tendon rupture in a SNAC wrist.

Hand Surg Rehabil 2021 Apr 24. Epub 2021 Apr 24.

Department of Orthopaedics and Traumatology, University Hospital Brussels (Vrije Universiteit Brussel), Pleinlaan 2, 1050 Brussels, Belgium; Department of Orthopaedics and Traumatology, Maria Middelares Hospital, Buitenring-Sint-Denijs 30, 9000 Gent, Belgium. Electronic address:

We present two recent cases of spontaneous rupture of both index finger extensor digitorum communis and extensor indices proprius tendons caused by a dorsal carpus osteophyte. Both patients had a history of scaphoid fracture non-union with evolution to scaphoid non-union advanced collapse (SNAC) of the wrist. These two cases were treated surgically with a 3-corner arthrodesis, and an interposition of a fragment of one of both ruptured tendons together with a tendon transfer of a supernumerary extensor digitorum communis of the third finger. Read More

View Article and Full-Text PDF

The effect of early controlled mobilization combined with target focused exercise regime in management of closed reduction K-wire fixation of proximal phalanx fracture.

Hand Surg Rehabil 2021 Apr 24. Epub 2021 Apr 24.

Chilliwack General Hospital, 45600 Menholm Rd, Chilliwack BC, V2P 1P7, Canada. Electronic address:

The phalangeal and metacarpal fractures are common fractures of the upper extremity. The most common complications of proximal phalanx fracture are the extensor lag and stiffness at the proximal interphalangeal joint, which leads to poor outcomes. Poor treatment compliance has also been identified among our patients. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Fast skeletal myosin-binding protein-C regulates fast skeletal muscle contraction.

Proc Natl Acad Sci U S A 2021 Apr;118(17)

Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati, OH 45267;

Fast skeletal myosin-binding protein-C (fMyBP-C) is one of three MyBP-C paralogs and is predominantly expressed in fast skeletal muscle. Mutations in the gene that encodes fMyBP-C, , are associated with distal arthrogryposis, while loss of fMyBP-C protein is associated with diseased muscle. However, the functional and structural roles of fMyBP-C in skeletal muscle remain unclear. Read More

View Article and Full-Text PDF

Comparison of four different immobilization methods in the treatment of tendinous mallet finger injury.

Ulus Travma Acil Cerrahi Derg 2021 May;27(3):356-361

Department of Plastic, Reconstructive and Aesthetic Surgery, Hand Surgery Division, İstanbul University İstanbul Faculty of Medicine, İstanbul-Turkey.

Background: Although there is consensus that closed tendinous mallet finger injuries should be treated conservatively, the best method of immobilization to be used is not clear and the existing data in the literature are not conclusive. The aim of this study is to compare the results of four different immobilization methods used in the conservative treatment of tendinous mallet finger injury.

Methods: Ninety-six patients with tendinous mallet finger injury were treated with four different immobilization methods (stack orthosis, thermoplastic orthosis, aluminum orthosis, and Kirschner wire [K-wire] immobilization). Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Knee strength deficits following anterior cruciate ligament reconstruction differ between quadriceps and hamstring tendon autografts.

Knee Surg Sports Traumatol Arthrosc 2021 Apr 19. Epub 2021 Apr 19.

School of Allied Health, Human Services and Sport, College of Science, Health and Engineering, La Trobe University, Melbourne, VIC, 3086, Australia.

Purpose: To compare patient reported outcomes and functional knee recovery following anterior cruciate ligament (ACL) reconstruction using either a quadriceps tendon (QT) or hamstring tendon (HT) autograft.

Methods: Thirty-five QT patients (age 20; range 15-34 years) participated in this study and were matched for gender, age and pre-injury activity level to 70 HT (age 20; range 15-32 years) patients. The following assessments were performed at 6 and 12 months post-operatively; standardized patient-reported outcome measures (IKDC, KOOS-QOL, ACL-RSI, Marx activity, anterior knee pain), knee range of motion (passive and active), anterior knee laxity, hop tests (single and triple crossover hop for distance), and isokinetic strength of the knee extensors and flexors. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

Maximal isometric strength indices are associated with the oxygen cost of walking and running in recreationally active men and women.

Res Sports Med 2021 Apr 18:1-14. Epub 2021 Apr 18.

Institute of Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, German Sport University, Cologne, Germany.

This study assessed the associations of maximal isometric strength and movement economy in 126 recreationally active men and women. Oxygen consumption was assessed through a graded treadmill test with 4-minute increments (4-12 km∙h). Maximal isometric leg extensor, leg flexor and handgrip strength were assessed by isometric dynamometry. Read More

View Article and Full-Text PDF

Nerve transfers in tetraplegia: a review and practical guide.

J Neurosurg Sci 2021 Apr 16. Epub 2021 Apr 16.

Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Basel, Basel, Switzerland.

Introduction: Spinal cord injury (SCI) may lead to tetraplegia. Several nerve transfers have been successfully used for the restoration of the upper limb in tetraplegia. Reconstruction of an upper limb is individualized based on the functional level. Read More

View Article and Full-Text PDF

Impact of appendicular and trunk skeletal muscle mass and back extensor strength on sagittal spinal alignment in Japanese women without vertebral fracture.

Osteoporos Sarcopenia 2021 Mar 4;7(1):36-41. Epub 2021 Mar 4.

Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita, 010-8543, Japan.

Objectives: Progressive and generalized loss of skeletal muscle mass (SMM) and strength are characteristics of sarcopenia. However, the impact of appendicular and trunk SMM and back extensor strength (BES) on spinal sagittal alignment remains unclear. Herein, we investigate the relationship between these factors and spinal sagittal alignment. Read More

View Article and Full-Text PDF

Knee extensor power predicts six-minute walk test performance in people with transfemoral amputations.

PM R 2021 Apr 18. Epub 2021 Apr 18.

Center for Bionic Medicine, Shirley Ryan AbilityLab, Chicago, IL.

Introduction: Lower limb amputees have increased metabolic costs during walking which may be mitigated by maintaining quadriceps strength and power following amputation. However, there are no current studies investigating the relationship between thigh strength and walking performance in individuals with transfemoral amputation.

Objective: To quantify the relationship between intact limb quadriceps strength in transfemoral amputees and six-minute walk test (6MWT) performance. Read More

View Article and Full-Text PDF

Effect of Whole-Body Vibration Training on Muscle Activation for Individuals with Knee Osteoarthritis.

Biomed Res Int 2021 26;2021:6671390. Epub 2021 Mar 26.

Department of Rehabilitation Medicine, Shanghai Shangti Orthopaedic Hospital, 200438 Shanghai, China.

Whole-body vibration (WBV) training may improve the strength of lower extremity muscles in patients with knee osteoarthritis (KOA), but the inconsistency in vibration parameters leads to differences in findings. This cross-sectional study is aimed at observing the effects of different vibration frequencies and knee flexion angles on the activation of lower extremity muscles in patients with KOA. Enrolled participants received WBV training at 0, 30, and 60° knee flexion angles with vibration frequencies of 0, 5, 10, and 20 Hz. Read More

View Article and Full-Text PDF

Determination of reference intervals for knee motor functions specific to patients undergoing knee arthroplasty.

PLoS One 2021 14;16(4):e0249564. Epub 2021 Apr 14.

Department of Rehabilitation, Hoshasen Daiichi Hospital, Imabari, Japan.

Background: In patients with knee osteoarthritis (KOA) undergoing knee arthroplasty (KA), lower-limb motor function tests are commonly measured during peri-surgical rehabilitation. To clarify their sources of variation and determine reference intervals (RIs), a multicenter study was performed in Japan.

Methods: We enrolled 545 KOA patients (127 men; 418 women; mean age 74. Read More

View Article and Full-Text PDF

Association of knee extensor muscle strength and cardiorespiratory fitness with bone stiffness in Japanese adults: A cross-sectional study.

J Epidemiol 2021 Apr 10. Epub 2021 Apr 10.

Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo.

BackgroundKnee extensor muscle strength and cardiorespiratory fitness (CRF) are major components of physical fitness. Because the interactive association of knee extensor muscle strength and CRF with bone health remains unclear, we aimed to investigate such association in Japanese adults.MethodsAltogether, 8,829 Japanese adults (3,731 men and 5,098 women) aged ≥45 years completed the maximum voluntary knee extension test, submaximal exercise test, medical examination, and a questionnaire on lifestyle habits. Read More

View Article and Full-Text PDF

Correlations between isokinetic knee torques and single-leg hop distances in three directions in patients after ACL reconstruction.

BMC Sports Sci Med Rehabil 2021 Apr 9;13(1):38. Epub 2021 Apr 9.

Clinical Center for Sports Medicine and Sports Dentistry, Tokyo Medical and Dental University, Tokyo, Japan.

Background: When planning rehabilitation and conditioning for performance enhancement and a return to sports after anterior cruciate ligament reconstruction, identifying the elements of physical function associated with single-leg hop is important. The purpose of this study was to clarify the relationship between single-leg hop distances in three directions and knee extensor and flexor strengths at 6 months after reconstruction.

Methods: Participants were 47 patients taking part in training sessions for sports involving cutting, pivoting, and jump-landing 6 months after reconstruction using a hamstring tendon. Read More

View Article and Full-Text PDF

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

View Article and Full-Text PDF

The effects of adiposity, muscular strength, cardiorespiratory fitness, and fatigue on gait biomechanics in overweight and obese children.

Clin Biomech (Bristol, Avon) 2021 Apr 23;84:105332. Epub 2021 Mar 23.

Department of Physical Therapy and Rehabilitation Science, 100 Medical Education Bldg. Rm 1-252, Iowa City, IA 52242-1190, United States.

Background: Obesity rates continue to increase in the child population. Muscular strength, cardiorespiratory fitness, and fatigue can potentially affect joint stresses in obese children. The purposes are to examine: (1) the relationship between cardiorespiratory fitness and the change in joint stress pre- to post-fatigue; (2) the predictive value of fitness, adiposity, and muscular strength on joint stresses in fatigued and non-fatigued states; and, (3) the relationships between % body fat from skinfold and air displacement plethysmography. Read More

View Article and Full-Text PDF