645 results match your criteria Hamstring Strain

Return to sport and beyond following intramuscular tendon hamstring injury: A case report of an English Premier League football player.

Phys Ther Sport 2022 May 31;56:38-47. Epub 2022 May 31.

Masira Research Institute, University of Santander (UDES), Bucaramanga, Colombia; Sports Science Center (CCD), Colombian Ministry of Sport (Mindeporte), Colombia. Electronic address: https://twitter.com/danielcohen1971.

Background: Hamstring strain injuries are the most common type of injury in elite football and are associated with a high risk of reinjury, particularly those involving the intramuscular tendon (IMT). Limited information is available regarding the rehabilitation and return to sport (RTS) processes following such injuries. This case study describes the clinical presentation of an elite football player following IMT hamstring injury, their on- and off-pitch rehabilitation alongside performance monitoring throughout RTS and beyond. Read More

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Anterior Cruciate Ligament Reconstruction with 4-Strand Hamstring Tendon Construct May be Biomechanically Superior to 5-Strand Hamstring Tendon Construct When Using Femoral Suspensory Fixation.

Arthrosc Sports Med Rehabil 2022 Jun 24;4(3):e1097-e1102. Epub 2022 May 24.

Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington, U.S.A.

Purpose: To compare stiffness, strain, and load to failure of 4- versus 5-strand hamstring anterior cruciate ligament reconstruction human tendon allografts with femoral suspensory and tibial interference screw fixation.

Methods: Allograft hamstring tendons were used to create 10 four-strand (4S) and 10 five-strand (5S) grafts. Grafts were fixed to a uniaxial electromechanical load system via a femoral cortical suspensory button and a bioabsorbable interference screw in bone analogue. Read More

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The Relationship between the Hamstring-to-Quadriceps Ratio and Jumping and Sprinting Abilities of Young Male Soccer Players.

Int J Environ Res Public Health 2022 Jun 18;19(12). Epub 2022 Jun 18.

Department of Child Development, Faculty of Health Science, Bilecik Şeyh Edebali University, Bilecik 11000, Turkey.

The correct torque ratio between the knee joint extensor and flexor muscle groups can effectively prevent injuries to the anterior cruciate ligament and hamstring strain. However, it is unclear whether a high torque ratio of the knee joint flexor muscles to the extensor muscles is beneficial for sport performance. Therefore, the aim of the study was to investigate the relationship between the hamstring-to-quadriceps (H/Q) ratio and sprint times (10- and 30-m) and jump heights (CMJ-countermovement jump and SJ-squat jump) in soccer players. Read More

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SCS 4th Annual Conference: Strength and Conditioning for Human Performance, Porto, Portugal, 2021.

Sports (Basel) 2022 Jun 10;10(6). Epub 2022 Jun 10.

Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, 4200-450 Porto, Portugal.

On behalf of the Strength & Conditioning Society (SCS) and the Faculty of Sport of the University of Porto, we are pleased to present the abstracts of the SCS 4th Annual Conference: Strength and Conditioning for Human Performance, which took place in, Porto, Portugal, on 12-13 November 2021. The event was a success with invited sessions from renowned international and national speakers on a myriad of topics related to strength and conditioning and its application to health and sports performance, such as agility training and testing, high-intensity interval training in chronic conditions, hamstring strain injuries in soccer, and the utilization of surface electromyography (EMG) decomposition for assessing human performance, among others. During the Conference there were also different practical workshops on (1) velocity-based training; (2) performance testing and athlete monitoring using force platforms; (3) 3D kinematics tracking and flow force assessment in aquatic sports; (4) the application of inertial sensors for physical performance testing; (5) muscle fiber recruitment, force production, and energy expenditure in progressive bicycle testing; (6) EMG decomposition, motor-units recruitment, and muscle contraction modes; and (7) recovery strategies in team-sport athletes. Read More

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The Immediate Effect of Adding Lumbar Mobilization to A Static Stretching Program on Hamstrings Range of Motion: An Exploratory Study.

J Sports Sci Med 2022 Jun 1;21(2):253-259. Epub 2022 Jun 1.

Department of Physical Therapy, Angelo State University, San Angelo, TX, USA.

A contributing risk factor and a byproduct of a hamstrings strain is limited hamstrings range of motion (ROM). Some evidence supports static stretching (SS) and lumbar spinal mobilization therapy (LSMT) as an effective means for increasing hamstrings ROM. However, the efficacy of combining LSMT and SS for increasing hamstrings ROM is unknown. Read More

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Single Leg Bridge Test is Not a Valid Clinical Tool to Assess Maximum Hamstring Strength.

Int J Sports Phys Ther 2022 1;17(4):613-621. Epub 2022 Jun 1.

Universidade Federal de Ciências da Saúde de Porto Alegre.

Background: The single leg bridge test (SLBT) has been introduced in the sports context as a way of estimating hamstring muscle capacity for prevention and rehabilitation of hamstring strain injuries.

Purpose: The primary aim was to examine the association between SLBT scores with concentric and eccentric knee flexor peak torques. Secondarily, this study aimed examine the association of between-limb asymmetries provided by SLBT and isokinetic tests. Read More

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Risk Factors for Quadriceps Muscle Strain Injuries in Sport: A Systematic Review.

J Orthop Sports Phys Ther 2022 Jun;52(6):389-400

Objective: To identify risk factors for quadriceps muscle strain injury in sport.

Design: Risk factor systematic review.

Literature Search: A systematic search was conducted in the MEDLINECINAHL, Embase, AMED, AUSPORT, SPORTDiscus, PEDro, and Cochrane Library databases (from inception to September 2021). Read More

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Hamstring Injuries in Sport.


J Orthop Sports Phys Ther 2022 Jun;52(6):410

This JOSPT Infographic on hamstring injuries in sport is based on clinical practice guidelines by Martin et al. titled "Hamstring Strain Injury in Athletes" ( 2022;52(3):CPG1-CPG44. (https://doi. Read More

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The influence of isokinetic dynamometer configuration on eccentric hamstring strength metrics: implications for testing and training.

Res Sports Med 2022 May 31:1-9. Epub 2022 May 31.

Sports Injuries Research Group, Department of Sport & Physical Activity, Edge Hill University, Ormskirk UK.

Isokinetic dynamometry is the clinical gold standard for strength assessment but testing protocols and outcome metrics can lack functional relevance. To quantify the influence of dynamometer configuration on eccentric hamstring strength metrics, 23 trained participants completed isokinetic eccentric knee flexor trials at 180°·s in a seated and extended hip position. The extended position elicited a greater peak torque (P = 0. Read More

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Isotonic and Isometric Exercise Interventions Improve the Hamstring Muscles' Strength and Flexibility: A Narrative Review.

Healthcare (Basel) 2022 Apr 27;10(5). Epub 2022 Apr 27.

Department of Exercise and Health Science, College of Human Development and Health, National Taipei University of Nursing and Health Sciences, Taipei 112303, Taiwan.

Background: Hamstring weakness has been associated with an increased risk of hamstring strain, a common sports injury that occurs when athletes perform actions such as quick sprints. The hamstring complex comprises three distinct muscles: the long and short heads of the bicep femoris, the semimembranosus, and the semitendinosus.

Methods: The researchers collected the data from different electronic databases: PubMed, Google Scholar, and the Web of Science. Read More

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The hamstrings to quadriceps functional ratio expressed over the full angle-angular velocity range using a limited number of data points.

R Soc Open Sci 2022 Apr 27;9(4):210696. Epub 2022 Apr 27.

School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK.

The hamstring to quadriceps (H : Q) strength ratio is widely used to identify individuals at risk of sustaining hamstring strain injuries. However, its efficacy is not supported by the current evidence. Current methods for the calculation of the H : Q ratio provide only a one- or two-dimensional ratio, often ignoring fundamental muscle mechanical properties. Read More

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Is Workload Associated With Hamstring and Calf Strains in Professional Baseball Players? An Analysis of Days of Rest, Innings Fielded, and Plate Appearances.

Sports Health 2022 May 19:19417381221093557. Epub 2022 May 19.

Rothman Orthopaedic Institute, New York, NY.

Background: The influence of player workload on hamstring and calf injuries in professional baseball players remains unknown.

Hypothesis: Increased workload would significantly increase hamstring and calf strain injury risk.

Study Design: Case-control. Read More

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The acute effects of different hamstring muscle stretching techniques on reducing muscle resistance to movement by ultrasound elastography.

J Bodyw Mov Ther 2022 04 19;30:112-117. Epub 2022 Jan 19.

Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Gazi University, Ankara, Turkey. Electronic address:

Objective: Many stretching methods are applied on the hamstring muscles for reducing muscle resistance on movement. The aim of our study to investigate the acute effects of static stretching and the Mulligan traction straight leg raise (TSLR) technique administered to the hamstring muscles on reducing its resistance to movement.

Methods: The study included 22 healthy male volunteers (19. Read More

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Nestin and osteocrin mRNA increases in human semitendinosus myotendinous junction 7 days after a single bout of eccentric exercise.

Histochem Cell Biol 2022 Apr 15. Epub 2022 Apr 15.

Section for Sports Traumatology M51, Department of Orthopaedic Surgery M, Bispebjerg and Frederiksberg Hospital, Copenhagen University Hospital, Nielsine Nielsens Vej 3, 2400 NV, Copenhagen, Denmark.

The myotendinous junction (MTJ), a specialized interface for force transmission between muscle and tendon, has a unique transcriptional activity and is highly susceptible to muscle strain injury. Eccentric exercise training is known to reduce this risk of injury, but knowledge of the influence of exercise on the MTJ at the molecular and cellular levels is limited. In this study, 30 subjects were randomized to a single bout of eccentric exercise 1 week prior to tissue sampling (exercised) or no exercise (control). Read More

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Biomechanical properties of common graft choices for anterior cruciate ligament reconstruction: A systematic review.

Clin Biomech (Bristol, Avon) 2022 May 1;95:105636. Epub 2022 Apr 1.

Children's Hospital of Philadelphia Department of Orthopaedic Surgery 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA.

Background: This systematic review explores the differences in the intrinsic biomechanical properties of different graft sources used in anterior cruciate ligament (ACL) reconstruction as tested in a laboratory setting.

Methods: Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, two authors conducted a systematic review exploring the biomechanical properties of ACL graft sources (querying PubMed, Cochrane, and Embase databases). Using the keywords "anterior cruciate ligament graft," "biomechanics," and "biomechanical testing," relevant articles of any level of evidence were identified as eligible and included if they reported on the biomechanical properties of skeletally immature or mature ACL grafts solely and if the grafts were studied in vitro, in isolation, and under similar testing conditions. Read More

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Preseason Eccentric Strength is Not Associated with Hamstring Strain Injury: A Prospective Study in Collegiate Athletes.

Med Sci Sports Exerc 2022 Apr 13. Epub 2022 Apr 13.

Badger Athletic Performance Program, University of Wisconsin-Madison, Madison, WI.

Introduction: Established risk factors for hamstring strain injuries (HSI) include older age and prior HSI. However, these are non-modifiable and have a limited role in injury prevention. Eccentric hamstring strength is a common component of HSI prevention programs but its association with injury is less clear. Read More

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Predicting Hamstring Strains in Soccer Players Based on ROM: An Analysis From a Gender Perspective.

Res Q Exerc Sport 2022 Apr 8:1-7. Epub 2022 Apr 8.

Universidad de Vigo.

The aim of this study was to explore if specific hip and knee range-of-movement (ROM) tests can predict a risk factor for hamstring strain (HS) injury in male and female soccer players. One hundred amateur soccer players (56 men and 44 women) performed six tests to determine hip and knee ROM: straight leg raise test (SLR), modified Thomas test (TT), hip internal and external rotation (ER), hip abduction and adduction, Nachlas test and Ridge test. A logistic regression analysis was carried out to create a predictive model for HS injuries. Read More

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Injury and Illness in Elite Athletics: A Prospective Cohort Study Over Three Seasons.

Int J Sports Phys Ther 2022 1;17(3):420-433. Epub 2022 Apr 1.

Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway; Centre for Disease Burden, Norwegian Institute of Public Health, Bergen, Norway.

Background: Athletics (also known as track and field) is one of the most popular sports in the world and is the centrepiece of the Summer Olympic Games. Participation in athletics training and competition involves a risk of illness and injury.

Purpose: To describe injury and illness in British Olympic track and field athletes over three full training and competition seasons. Read More

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Incidence of Injury for Professional Soccer Players in the United States: A 6-Year Prospective Study of Major League Soccer.

Orthop J Sports Med 2022 Mar 24;10(3):23259671211055136. Epub 2022 Mar 24.

Department of Orthopaedics, University of California-Davis, Davis, California, USA.

Background: Despite an abundance of injury research focusing on European professional soccer athletes, there are limited injury data on professional soccer players in the United States.

Purpose: To describe the epidemiology of injury across multiple years in Major League Soccer (MLS) players.

Study Design: Descriptive epidemiology study. Read More

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The Effect of Ankle Position on Peak Eccentric Force during The Nordic Hamstring Exercise.

J Sports Sci Med 2022 03 15;21(1):43-48. Epub 2022 Feb 15.

Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.

Peak eccentric force during the Nordic hamstring exercise (NHE) is recognized as a predictive factor for hamstring strain injury (HSI). During the NHE, the knee flexor muscles are eccentrically contracting to resist the knee joint extension. Therefore, it is thought that the action of the gastrocnemius muscle, and thus the ankle position, influences peak eccentric force during the NHE. Read More

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Hamstring injuries in England and Wales elite men's domestic cricket from 2010 to 2019.

J Sci Med Sport 2022 Jun 10;25(6):474-479. Epub 2022 Feb 10.

Department for Health, University of Bath, United Kingdom.

Objectives: Describe hamstring injury incidence across competition formats, activity at time of injury, and time of season, facilitating the identification of injury risk factors in elite men's senior First-Class County Cricket.

Design: Prospective cohort.

Methods: Hamstring time loss injury incidence (between format, activity, and time of season) calculated for elite men's senior First-Class County Cricket seasons 2010 to 2019. Read More

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Hamstring Injury: What Is It? What Should I Do About It? When Can I Get Back to My Sport?


J Orthop Sports Phys Ther 2022 Mar;52(3):129

Recently, experts developed a guideline for physical therapists to use when treating hamstring injuries. We explain what the guidelines mean for your hamstring injury and answer questions you might have about how long it takes to recover and when you can play your sport again. . Read More

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Hamstring Strain Injury in Athletes: A Summary of Clinical Practice Guideline Recommendations: Using the Evidence to Guide Physical Therapist Practice.


J Orthop Sports Phys Ther 2022 Mar;52(3):127-128

Hamstring strain injuries (HSIs) are common in sports that involve high-speed running, jumping, kicking, explosive lower extremity movements, or lifting objects from the ground. HSIs may result in considerable impairment, activity limitation, and participation restriction, including time lost from competitive sports. The high reinjury rate is also a challenge. Read More

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Is Muscle Architecture Different in Athletes with a Previous Hamstring Strain? A Systematic Review and Meta-Analysis.

J Funct Morphol Kinesiol 2022 Jan 31;7(1). Epub 2022 Jan 31.

Laboratory of Neuromechanics, Department of Physical Education and Sport Sciences at Serres, Aristotle University of Thessaloniki, 62100 Serres, Greece.

Hamstring strains are a frequent injury in sports and are characterized by a high recurrence rate. The aim of this review was to examine the muscle and tendon architecture in individuals with hamstring injury. A systematic literature search in four databases yielded eleven studies on architecture following injury. Read More

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January 2022

The Efficacy of Flywheel Inertia Training to Enhance Hamstring Strength.

J Funct Morphol Kinesiol 2022 Jan 20;7(1). Epub 2022 Jan 20.

HealthCore, Department of Science and Health, Institute of Technology Carlow, R93 V960 Carlow, Ireland.

The purpose of this narrative review is to examine the efficacy of flywheel inertia training to increase hamstring strength. Hamstring strain injury is common in many sports, and baseline strength deficits have been associated with a higher risk of hamstring strain injury. As a result, strength and conditioning professionals actively seek additional techniques to improve hamstring strength with the aim of minimising the incidence of hamstring strain injury. Read More

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January 2022

Test-Retest of a Novel Wii Board-Based Device to Assess Eccentric Knee Flexor Strength During the Nordic Hamstring Exercise.

J Sport Rehabil 2022 Feb 25:1-6. Epub 2022 Feb 25.

This study aimed to assess the test-retest reliability of a Wii board-based device to assess the eccentric knee strength. Healthy participants (n = 20, 22.7 [3. Read More

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February 2022

Relationship between Nordic hamstring strength and maximal voluntary eccentric, concentric and isometric knee flexion torque.

PLoS One 2022 25;17(2):e0264465. Epub 2022 Feb 25.

Center for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia.

Nordic hamstring exercise is performed to prevent knee flexor muscle strain injuries and used to assess their injury risks. However, what exactly Nordic hamstring strength indicates is not clear. We investigated the relationship between Nordic hamstring strength and maximal voluntary contraction (MVC) torque of the knee flexors measured by an isokinetic dynamometer. Read More

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Hamstring Strain Injury Rehabilitation.

J Athl Train 2022 Feb;57(2):125-135

University of Wisconsin, Madison.

Hamstring strain injuries are common among athletes and often require rehabilitation to prepare players for a timely return to sport performance while also minimizing reinjury risk. Return to sport is typically achieved within weeks of the injury; however, subsequent athlete performance may be impaired, and reinjury rates are high. Improving these outcomes requires rehabilitation practitioners (eg, athletic trainers and physical therapists) to understand the causes and mechanisms of hamstring strain injury, know how to perform a thorough clinical examination, and progress loading to the site of injury safely and effectively. Read More

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February 2022

Quantification of Global Myoelectric Spatial Activations to Delineate Normal Hamstring Function at Progressive Running Speeds: A Technical Report.

J Strength Cond Res 2022 Mar;36(3):867-870

Emory Sports Performance And Research Center (SPARC), Flowery Branch, Georgia.

Abstract: Schlink, BR, Nordin, AD, Diekfuss, JA, and Myer, GD. Quantification of global myoelectric spatial activations to delineate normal hamstring function at progressive running speeds: A technical report. J Strength Cond Res 36(3): 867-870, 2022-Hamstring function is critical to maintain sport performance, and strain injuries to the biceps femoris muscle commonly force an athlete to withdraw from their sport while the muscle heals. Read More

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Hamstring Strain Injury in Athletes.

J Orthop Sports Phys Ther 2022 Mar 14;52(3):CPG1-CPG44. Epub 2022 Feb 14.

Hamstring strain injury (HSI) may result in considerable impairment, activity limitation, and participation restriction, including time lost from competitive sports. This CPG includes sports-related overloading and overstretching injuries to myofascial or musculotendinous structures in any combination of the 3 hamstring muscles (the semitendinosus, semimembranosus, and biceps femoris). . Read More

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