446 results match your criteria Hamstring Strain


Prevalence of Hamstring Strain Injury Risk Factors in Professional and Under-20 Male Football (Soccer) Players.

J Sport Rehabil 2019 Feb 12:1-23. Epub 2019 Feb 12.

1 Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil.

Context:: Hamstring strain injury (HSI) is the most prevalent injury in football (soccer), and a few intrinsic factors have been associated with higher injury rates.

Objective:: To describe the prevalence of the main intrinsic risk factors for HSI in professional and under-20 football players.

Design:: Cross-sectional study. Read More

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http://dx.doi.org/10.1123/jsr.2018-0084DOI Listing
February 2019
1 Read

Mechanical and Microstructural Properties of Pediatric Anterior Cruciate Ligaments and Autograft Tendons Used for Reconstruction.

Orthop J Sports Med 2019 Jan 23;7(1):2325967118821667. Epub 2019 Jan 23.

Biedermann Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Background: Over the past several decades, there has been a steady increase in pediatric anterior cruciate ligament (ACL) tears, particularly in young female basketball and soccer players. Because allograft tissue for pediatric ACL reconstruction (ACLR) has shown high rates of failure, autograft tissue may be the best option for ACLR in this population. However, differences in the structure and mechanical behavior of these tissues are not clear. Read More

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http://journals.sagepub.com/doi/10.1177/2325967118821667
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http://dx.doi.org/10.1177/2325967118821667DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6348523PMC
January 2019
1 Read

Chronic Effects of a Static Stretching Program on Hamstring Strength.

J Strength Cond Res 2019 Jan 23. Epub 2019 Jan 23.

Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.

Nakao, S, Ikezoe, T, Nakamura, M, Umegaki, H, Fujita, K, Umehara, J, Kobayashi, T, Ibuki, S, and Ichihashi, N. Chronic effects of a static stretching program on hamstring strength. J Strength Cond Res XX(X): 000-000, 2019-This study investigated the effects of a 4-week static stretching (SS) program on isokinetic and isometric knee flexor peak torque and angle of peak torque. Read More

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http://dx.doi.org/10.1519/JSC.0000000000003037DOI Listing
January 2019
1 Read

Cross-cultural adaptation, translation, and validation of the functional assessment scale for acute hamstring injuries (FASH) questionnaire for French-speaking patients.

Disabil Rehabil 2019 Jan 22:1-7. Epub 2019 Jan 22.

c Department of Sport and Rehabilitation Sciences , University of Liège , Liège , Belgium.

Study Design: This consisted of a translation and validation study.

Background: Acute hamstring injury is a frequent muscle strain in sports that require high explosive strength, impulsion or running phases. Therefore, the Functional Assessment Scale for Hamstring Injury questionnaire was developed to assess pain, physical activity level and ability to perform various exercises in patients with hamstring injuries. Read More

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http://dx.doi.org/10.1080/09638288.2018.1544669DOI Listing
January 2019
1 Read

Photobiomodulation therapy as a tool to prevent hamstring strain injuries by reducing soccer-induced fatigue on hamstring muscles.

Lasers Med Sci 2019 Jan 3. Epub 2019 Jan 3.

Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.

Muscle fatigue is a potential risk factor for hamstring strain injuries in soccer players. The aim of this study was to verify the effect of photobiomodulation therapy (PBMT) on the hamstrings' muscle fatigue of soccer players during a simulated match. Twelve male amateur soccer players (~ 25 years) participated in this randomized, crossover, double-blinded, placebo-controlled trial. Read More

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http://dx.doi.org/10.1007/s10103-018-02709-wDOI Listing
January 2019
10 Reads

Acute Effect of Active and Passive Static Stretching on Elastic Modulus of the Hamstrings.

Sports Med Int Open 2018 Nov 15;2(6):E163-E170. Epub 2018 Nov 15.

Graduate School of Health Sciences, Sapporo Medical University, Sapporo, Japan.

The purpose of this study was to investigate differences in the acute effects of passive knee extension (PKE) and active knee extension (AKE) stretching on the shear elastic modulus of the hamstrings. In 20 healthy men, maximum knee extension (maximum range of motion [ROM]) and shear elastic modulus of the hamstrings (biceps femoris long head, semitendinosus, semimembranosus) were measured before (Pre) and after (Post) AKE and PKE stretching. The maximum ROM during stretching was measured. Read More

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http://dx.doi.org/10.1055/a-0733-6957DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6277241PMC
November 2018
1 Read

The Risk Factors of Hamstring Strain Injury Induced by High-Speed Running.

J Sports Sci Med 2018 Dec 20;17(4):650-655. Epub 2018 Nov 20.

Graduate School of Health and Sport Sciences, Chukyo University, Aichi, Japan.

Hamstring strain injury is a multifactorial and complex problem involving interactions among various factors. Information about risk factors for this injury is inconsistent among studies because the strong effects of confounding factors and injury situations are often ignored. We investigated the relationship between hamstring strain induced by high-speed running and intrinsic risk factors, including hip muscle morphology and function, by excluding the influences of confounding factors. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6243618PMC
December 2018
8 Reads

Validity of an on-Field Readaptation Program Following a Hamstring Injury in Professional Soccer.

J Sport Rehabil 2018 Nov 14:1-20. Epub 2018 Nov 14.

b Camilo José Cela University. Faculty of Physical Activity and Sports Sciences Calle Castillo de Alarcón, Madrid, Spain.

Context:: Despite the presence of various injury prevention programs, the rate of hamstring injuries and re-injuries is increasing, warranting the need for a soccer-specific rehabilitation program.

Objective:: To develop and validate a new, functional on-field program for the rehabilitation and readaptation after a hamstring strain injury through a panel of experts; and determine its usefulness through the application of this program in professional soccer players.

Design:: A thirteen-item program was developed which was validated by a panel of experts and later applied to professional soccer players. Read More

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https://journals.humankinetics.com/doi/10.1123/jsr.2018-0203
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http://dx.doi.org/10.1123/jsr.2018-0203DOI Listing
November 2018
25 Reads

Progressive Workload Periodization Maximizes Effects of Nordic Hamstring Exercise on Muscle Injury Risk Factors.

J Strength Cond Res 2018 Oct 22. Epub 2018 Oct 22.

Federal University of Health Sciences of Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.

Severo-Silveira, L, Dornelles, MP, Lima-e-Silva, FX, Marchiori, CL, Medeiros, TM, Pappas, E, and Baroni, BM. Progressive workload periodization maximizes effects of Nordic hamstring exercise on muscle injury risk factors. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to investigate the effect of 2 different Nordic hamstring exercise (NHE) training programs (constant workload vs. Read More

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http://dx.doi.org/10.1519/JSC.0000000000002849DOI Listing
October 2018
6 Reads

Rehabilitation and return to sport after hamstring strain injury.

J Sport Health Sci 2017 Sep 10;6(3):262-270. Epub 2017 Apr 10.

Sports Rehabilitation, University of Wisconsin Hospital and Clinics, Madison, WI 53718, USA.

Hamstring strain injuries are common among sports that involve sprinting, kicking, and high-speed skilled movements or extensive muscle lengthening-type maneuvers with hip flexion and knee extension. These injuries present the challenge of significant recovery time and a lengthy period of increased susceptibility for recurrent injury. Nearly one third of hamstring strains recur within the first year following return to sport with subsequent injuries often being more severe than the original. Read More

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http://dx.doi.org/10.1016/j.jshs.2017.04.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189266PMC
September 2017
2 Reads

Research in prevention and rehabilitation of hamstring muscle strain injury.

Authors:
Bing Yu Li Li

J Sport Health Sci 2017 Sep 16;6(3):253-254. Epub 2017 Jun 16.

School of Health and Kinesiology, Georgia Southern University, Statesboro, GA 30460, USA.

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http://dx.doi.org/10.1016/j.jshs.2017.06.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189236PMC
September 2017
2 Reads

The effect of hamstring flexibility on peak hamstring muscle strain in sprinting.

J Sport Health Sci 2017 Sep 28;6(3):283-289. Epub 2017 Mar 28.

Center for Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

Background: The effect of hamstring flexibility on the peak hamstring muscle strains in sprinting, until now, remained unknown, which limited our understanding of risk factors of hamstring muscle strain injury (hamstring injury). As a continuation of our previous study, this study was aimed to examine the relationship between hamstring flexibility and peak hamstring muscle strains in sprinting.

Methods: Ten male and 10 female college students participated in this study. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S20952546173004
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http://dx.doi.org/10.1016/j.jshs.2017.03.012DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189015PMC
September 2017
6 Reads

Risk factors for hamstring injuries in Australian male professional cricket players.

J Sport Health Sci 2017 Sep 12;6(3):271-274. Epub 2017 May 12.

Cricket Australia, Melbourne, VIC 3002, Australia.

Background: Injuries to the hamstring are relatively common in professional cricketers (as they are in many team sports) and have increased in incidence in the "T20 era" (introduction of 20-over matches) of cricket since 2006.

Methods: This study analyzed incidence of hamstring injury in the various elite male match types over a 20-year period (1995-1996 to 2014-2015 seasons). Risk factors for hamstring strain were assessed using a multivariate logistic regression analysis technique. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S20952546173006
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http://dx.doi.org/10.1016/j.jshs.2017.05.004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6189243PMC
September 2017
13 Reads

Relationships among hamstring muscle optimal length and hamstring flexibility and strength.

J Sport Health Sci 2017 Sep 21;6(3):275-282. Epub 2016 Apr 21.

Center for Human Movement Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

Background: Hamstring muscle strain injury (hamstring injury) due to excessive muscle strain is one of the most common injuries in sports. The relationships among hamstring muscle optimal lengths and hamstring flexibility and strength were unknown, which limited our understanding of risk factors for hamstring injury. This study was aimed at examining the relationships among hamstring muscle optimal length and flexibility and strength. Read More

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http://dx.doi.org/10.1016/j.jshs.2016.04.009DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6188988PMC
September 2017
4 Reads

"Excessive muscle strain as the direct cause of injury" should not be generalized to hamstring muscle strain injury in sprinting.

Authors:
Mianfang Ruan

J Sport Health Sci 2018 Jan 19;7(1):123-124. Epub 2017 May 19.

Faculty of Physical Education, Ningbo University, Ningbo 315211, China.

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http://dx.doi.org/10.1016/j.jshs.2017.05.006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180555PMC
January 2018
2 Reads

Antagonist muscle architecture and aponeurosis/tendon strain of biceps femoris long head during maximal isometric efforts.

Eur J Appl Physiol 2019 Jan 3;119(1):73-83. Epub 2018 Oct 3.

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

Introduction: Examination of the mechanical behavior of the hamstrings when acting as antagonists provides information about loading of this muscle group and its role for joint stability during forceful quadriceps contractions. The aim of this study was to quantify biceps femoris long head fascicle length (FL), angle of pennation (PA) and distal tendon/aponeurosis strain during maximum voluntary contraction efforts of the knee extensors using real-time ultrasound.

Methods: Fourteen participants performed passive joint movements and maximum voluntary knee extension and flexion efforts of the knee flexors at 0°, 45° and 90° of knee flexion. Read More

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http://link.springer.com/10.1007/s00421-018-4000-2
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http://dx.doi.org/10.1007/s00421-018-4000-2DOI Listing
January 2019
2 Reads

ACUTE EFFECT OF LOW-INTENSITY ECCENTRIC EXERCISE ON ANGLE OF PEAK TORQUE IN SUBJECTS WITH DECREASED HAMSTRING FLEXIBILITY.

Int J Sports Phys Ther 2018 Aug;13(5):890-895

Faculty of Health and Sports Science, University of Tsukuba, Tsukuba, Japan.

Background: Decreased hamstring flexibility and the angle of peak torque (APT) occurring at a shorter muscle length are considered risk factors for hamstring strain injury. Subjects with decreased hamstring flexibility have an APT that occurs at a shorter muscle length; hence, the susceptibility to hamstring strain injury could be associated with the APT occurring at a shorter muscle length. Low-intensity eccentric exercise (ECC-Ex) may reduce hamstring strain injury risk in the subjects with decreased hamstring flexibility by allowing the APT to occur a longer muscle length. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6159499PMC
August 2018
2 Reads

Injury Prevention Programs Based on Flywheel vs. Body Weight Resistance in Recreational Athletes.

J Strength Cond Res 2018 Sep 28. Epub 2018 Sep 28.

Department of Life and Sports Science, University of Greenwich, London, United Kingdom.

Monajati, A, Larumbe-Zabala, E, Sampson, MG, and Naclerio, F. Injury prevention programs based on flywheel vs. body weight resistance in recreational athletes. Read More

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http://Insights.ovid.com/crossref?an=00124278-900000000-9512
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http://dx.doi.org/10.1519/JSC.0000000000002878DOI Listing
September 2018
17 Reads

Hamstring injury prevention: A role for genetic information?

Med Hypotheses 2018 Oct 1;119:58-62. Epub 2018 Aug 1.

Institute of Coaching and Performance, School of Sport and Wellbeing, University of Central Lancashire, Preston, UK.

Hamstring Strain Injuries (HSI) are common within many sports, imposing a significant burden in terms of both financial cost, recovery time, and loss of performance. Recently, research has focused on better understanding the factors that increase an individual's risk of suffering a HSI, with both lower strength (particularly eccentric strength) and shorter hamstring muscle fascicles found to play a significant role. Such findings have led to an increased popularization of eccentric hamstring exercises, such as the Nordic Hamstring Exercise, the correct utilization of which has been shown to reduce HSI rates. Read More

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http://dx.doi.org/10.1016/j.mehy.2018.07.011DOI Listing
October 2018
13 Reads

Intra- and Inter-Muscular Variations in Hamstring Architecture and Mechanics and Their Implications for Injury: A Narrative Review.

Sports Med 2018 Oct;48(10):2271-2283

Laboratory of Neuromechanics, Department of Physical Education and Sport Sciences at Serres, Aristotle University of Thessaloniki, Serres, 62110, Greece.

Understanding the architecture, anatomy, and biomechanics of the hamstrings may assist in explaining the mechanisms that affect and improve their function. The aim of this review is to specifically examine intra- and inter-muscular variations in architecture and mechanical properties of the hamstrings. Of the hamstrings, the long head of the biceps femoris shows the shortest and more pennated fibers. Read More

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http://dx.doi.org/10.1007/s40279-018-0975-4DOI Listing
October 2018
3 Reads

The effects of cryotherapy versus cryostretching on clinical and functional outcomes in athletes with acute hamstring strain.

J Bodyw Mov Ther 2018 Jul 31;22(3):805-809. Epub 2017 Aug 31.

Department of Human Movement Sciences, Faculty of Behavioral and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.

Purpose: Hamstring strain is a common sport injury that results in pain and functional limitation. Despite its high frequency in active populations, there is no agreement regarding the best method used for early intervention of hamstring strain. The aim of the present study was to compare the effects of cryotherapy and cryostretching on clinical and functional outcomes in athletes with acute hamstring strain. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13608592173021
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http://dx.doi.org/10.1016/j.jbmt.2017.08.007DOI Listing
July 2018
12 Reads

Time to get our four priorities right: an 8-year prospective investigation of 1326 player-seasons to identify the frequency, nature, and burden of time-loss injuries in elite Gaelic football.

PeerJ 2018 20;6:e4895. Epub 2018 Jul 20.

School of Public Health, Physiotherapy, and Sports Science, University College Dublin, Dublin, Ireland.

Managing injury risk requires an understanding of how and when athletes sustain certain injuries. Such information guides organisations in establishing evidence-based priorities and expectations for managing injury risk. In order to minimise the impact of sports injuries, attention should be directed towards injuries that occur frequently, induce substantial time-loss, and elevate future risk. Read More

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http://dx.doi.org/10.7717/peerj.4895DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6055676PMC

Effects of instrument-assisted soft tissue mobilization technique on strength, knee joint passive stiffness, and pain threshold in hamstring shortness.

J Back Musculoskelet Rehabil 2018 ;31(6):1169-1176

Institute of Sports Movement Artificial-Intelligence Technology, Department of Physical Therapy, Yonsei University, Wonju, Korea.

Background: Hamstring shortness is the most common musculoskeletal condition in sports athletes, which often contributes to hamstring strain injury. To effectively mitigate the hamstring shortness, contemporary HR, SCS, and IASTM soft tissue techniques have been used. The best practical evidence about the therapeutic effects and the biomechanical mechanisms underpinning these manual techniques remain unknown. Read More

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http://www.medra.org/servlet/aliasResolver?alias=iospress&am
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http://dx.doi.org/10.3233/BMR-170854DOI Listing
January 2019
57 Reads

Is Poor Hamstring Flexibility a Risk Factor for Hamstring Injury in Gaelic Games?

J Sport Rehabil 2019 Feb 14:1-5. Epub 2019 Feb 14.

Context: Hamstring injuries are a leading cause of injury in Gaelic games. Hamstring flexibility as a risk factor for hamstring injury has not yet been examined prospectively in Gaelic games.

Objective: To examine whether hamstring flexibility, using the modified active knee extension (AKE) test, and previous injury are risk factors for hamstring injury in Gaelic players and to generate population-specific AKE cutoff points. Read More

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http://dx.doi.org/10.1123/jsr.2017-0304DOI Listing
February 2019
4 Reads

[HAMSTRING STRAIN INJURIES IN SPORTSMEN].

Authors:
Atzmon Tsur

Harefuah 2018 Jun;157(6):388-391

Rehabilitation Department Galilee Medical Center, Nahariya Faculty of Medicine, Bar-Ilan University, Safed.

Introduction: Acute hamstring strain injuries are common in sports that involve sprinting, kicking, jumping or high-speed skilled movements. Despite increased knowledge of hamstring muscle injuries, the incidence has not diminished. It is generally believed that they happen during the terminal swing phase of the gait cycle. Read More

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June 2018
26 Reads

Stretch Could Reduce Hamstring Injury Risk During Sprinting by Right Shifting the Length-Torque Curve.

J Strength Cond Res 2018 Aug;32(8):2190-2198

School of Kinesiology, Shanghai University of Sport, Shanghai, China.

Ruan, M, Li, L, Chen, C, and Wu, X. Stretch could reduce hamstring injury risk during sprinting by right shifting the length-torque curve. J Strength Cond Res 32(8): 2190-2198, 2018-It was hypothesized that static stretch would shift the length-torque curve to the right, which may reduce the risk of muscle strain injuries. Read More

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http://dx.doi.org/10.1519/JSC.0000000000002645DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6092089PMC
August 2018
4 Reads

Is it possible to voluntarily increase hamstring muscle activation during landing from a snow jump in alpine skiing? - a pilot study.

J Sports Sci 2018 Jun 18:1-8. Epub 2018 Jun 18.

a Department of Sport Science , University of Innsbruck , Innsbruck , Austria, Europe.

Activation of the hamstrings has been discussed as a measure for reducing strain on the ACL during jump landings in alpine skiing. The current study tested the hypothesis that hamstring and quadriceps activation can be voluntarily increased by the athlete. Specifically, two different instructions - to increase hamstring activation or to increase upper-leg co-contraction - were compared to normal landings. Read More

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http://dx.doi.org/10.1080/02640414.2018.1488423DOI Listing
June 2018
2 Reads

Effect of acute augmented feedback on between limb asymmetries and eccentric knee flexor strength during the Nordic hamstring exercise.

PeerJ 2018 7;6:e4972. Epub 2018 Jun 7.

Faculty of Health Sciences and Medicine, Bond University, Gold Coast, QLD, Australia.

Background: Hamstring strain injuries (HSI) are one of the most prevalent and serious injuries affecting athletes, particularly those in team ball sports or track and field. Recent evidence demonstrates that eccentric knee flexor weakness and between limb asymmetries are possible risk factors for HSIs. While eccentric hamstring resistance training, e. Read More

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http://dx.doi.org/10.7717/peerj.4972DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5994331PMC
June 2018
2 Reads

A Review on Biomechanics of Anterior Cruciate Ligament and Materials for Reconstruction.

Appl Bionics Biomech 2018 13;2018:4657824. Epub 2018 May 13.

Centre for Biomedical Engineering, Indian Institute of Technology Delhi, New Delhi, India.

The anterior cruciate ligament is one of the six ligaments in the human knee joint that provides stability during articulations. It is relatively prone to acute and chronic injuries as compared to other ligaments. Repair and self-healing of an injured anterior cruciate ligament are time-consuming processes. Read More

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http://dx.doi.org/10.1155/2018/4657824DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5971278PMC
May 2018
7 Reads

Soccer Injury Movement Screen (SIMS) Composite Score Is Not Associated With Injury Among Semiprofessional Soccer Players.

J Orthop Sports Phys Ther 2018 Aug 8;48(8):630-636. Epub 2018 May 8.

Background The association between movement quality and injury is equivocal. No soccer-specific movement assessment has been prospectively investigated in relation to injury risk. Objectives To investigate the association between a soccer-specific movement-quality assessment and injury risk among semiprofessional soccer players. Read More

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https://www.jospt.org/doi/10.2519/jospt.2018.8037
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http://dx.doi.org/10.2519/jospt.2018.8037DOI Listing
August 2018
13 Reads

Common Running Injuries: Evaluation and Management.

Am Fam Physician 2018 Apr;97(8):510-516

Naval Hospital Jacksonville, Jacksonville, FL, USA.

Running is a common form of exercise but predisposes athletes to several running-related injuries. Most running injuries are due to overuse and respond to conservative treatment. Tendinopathies in the patellar, Achilles, and hamstring tendons are common, and are primarily treated with eccentric exercise. Read More

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April 2018
5 Reads

Infographic. The effect of high-speed running on hamstring strain injury risk.

Br J Sports Med 2018 Apr 12. Epub 2018 Apr 12.

Faculty of Life Sciences and Education, University of South Wales, Pontypridd, UK.

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http://dx.doi.org/10.1136/bjsports-2018-099358DOI Listing
April 2018
5 Reads

Knee flexion not hip extension strength is persistently reduced following hamstring strain injury in Australian Football athletes: Implications for Periodic Health Examinations.

J Sci Med Sport 2018 Oct 3;21(10):999-1003. Epub 2018 Apr 3.

Department of Physical Therapies, Australian Institute of Sport (AIS), Australia; Australian Collaboration for Research into Injury in Sport and its Prevention (ACRISP), Federation University Australia, Australia.

Objectives: Determine whether clinically feasible tests of isometric lower limb strength and range of motion (ROM) in Australian Football (AF) athletes are useful in Periodic Health Examinations to identify persistent deficits following hamstring strain injury (HSI).

Design: Case-control.

Methods: Thirty-seven male, semi-professional AF athletes (mean±SD; age, 20. Read More

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http://dx.doi.org/10.1016/j.jsams.2018.03.014DOI Listing
October 2018
4 Reads

Summative Report on Time Out of Play for Major and Minor League Baseball: An Analysis of 49,955 Injuries From 2011 Through 2016.

Am J Sports Med 2018 Jun 9;46(7):1727-1732. Epub 2018 Apr 9.

Sports Medicine and Shoulder Service, Hospital for Special Surgery, New York, New York, USA.

Background: Recent epidemiologic reports have demonstrated rising injury rates in Major League Baseball (MLB) and Minor League Baseball (MiLB). Although several studies have recently been published on specific injuries, the majority of injuries have not yet been formally studied.

Purpose: The purpose of this study is to (1) generate a summative analysis of all injuries that occur in MLB and MiLB, (2) identify the 50 most common injuries, and (3) generate focused reports and fact sheets on the characteristics of each of those diagnoses. Read More

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http://dx.doi.org/10.1177/0363546518765158DOI Listing
June 2018
5 Reads

Adductor magnus: An EMG investigation into proximal and distal portions and direction specific action.

Clin Anat 2018 May 23;31(4):535-543. Epub 2018 Mar 23.

School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Queensland, Australia.

Cadaveric studies indicate that adductor magnus is structurally partitioned into at least two regions. The aim of this study was to investigate the direction-specific actions of proximal and distal portions of adductor magnus, and in doing so determine if these segments have distinct functional roles. Fine-wire EMG electrodes were inserted into two portions of adductor magnus of 12 healthy young adults. Read More

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http://dx.doi.org/10.1002/ca.23068DOI Listing
May 2018
2 Reads

Does the graft-tunnel friction influence knee joint kinematics and biomechanics after anterior cruciate ligament reconstruction? A finite element study.

Authors:
Chao Wan Zhixiu Hao

Comput Methods Biomech Biomed Engin 2018 Feb 9;21(3):278-286. Epub 2018 Mar 9.

b Department of Mechanical Engineering , Tsinghua University , Beijing , China.

Graft tissues within bone tunnels remain mobile for a long time after anterior cruciate ligament (ACL) reconstruction. However, whether the graft-tunnel friction affects the finite element (FE) simulation of the ACL reconstruction is still unclear. Four friction coefficients (from 0 to 0. Read More

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http://dx.doi.org/10.1080/10255842.2018.1447103DOI Listing
February 2018
17 Reads

Knee flexion strength is significantly reduced following competition in semi-professional Australian Rules football athletes: Implications for injury prevention programs.

Phys Ther Sport 2018 May 2;31:9-14. Epub 2018 Feb 2.

Department of Physical Therapies, Australian Institute of Sport (AIS), Canberra, Australia; Australian Collaboration for Research into Injury in Sport and Its Prevention (ACRISP), Federation University Australia, Ballarat, Australia.

Objectives: To evaluate strength and flexibility measures pre- and post- Australian Football (AF) competition to determine their potential utility as secondary prevention measures.

Design: Cohort study.

Setting: Semi-professional AF club. Read More

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http://dx.doi.org/10.1016/j.ptsp.2018.01.001DOI Listing
May 2018
6 Reads

New MRI muscle classification systems and associations with return to sport after acute hamstring injuries: a prospective study.

Eur Radiol 2018 Aug 19;28(8):3532-3541. Epub 2018 Feb 19.

Aspetar Orthopaedic and Sports Medicine Hospital, PO Box 29222, Doha, Qatar.

Objectives: To determine agreement between modified Peetrons, Chan acute muscle strain injury classification and British Athletics Muscle Injury Classification (BAMIC) and to investigate their associations and ability to predict time to return to sport (RTS).

Methods: Male athletes (n=176) with acute hamstring injury and MRI (1.5T) ≤5 days were followed until RTS. Read More

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http://dx.doi.org/10.1007/s00330-017-5125-0DOI Listing
August 2018
5 Reads

Ultrasound Elastographic Measurement of Sciatic Nerve Displacement and Shear Strain During Active and Passive Knee Extension.

J Ultrasound Med 2018 Aug 12;37(8):2091-2103. Epub 2018 Feb 12.

Department of Rehabilitation Science, University of Vermont College of Nursing and Health Science, Burlington, Vermont, USA.

There is current need for objective measures of sciatic nerve mobility in patients with sciatic-type pain. The objective of the study was to assess the feasibility and reliability of ultrasound elastography to quantify sciatic nerve displacement and shear strain at the sciatic nerve-hamstring muscle interface during active and passive knee extension-flexion exercises performed while sitting in healthy people. Ultrasound elastography showed excellent intrarater within-session reliability for assessing sciatic nerve displacement and sciatic nerve-hamstring muscle interface shear strain during active knee extension-flexion exercises. Read More

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http://doi.wiley.com/10.1002/jum.14560
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http://dx.doi.org/10.1002/jum.14560DOI Listing
August 2018
13 Reads

Acute effects of different dynamic exercises on hamstring strain risk factors.

PLoS One 2018 1;13(2):e0191801. Epub 2018 Feb 1.

School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Zhongzheng District, Taipei City, Taiwan.

The purpose of the study was to examine the acute effects of different dynamic exercise interventions on hamstring muscle performance. Thirty-six young men with poor hamstring flexibility were randomly assigned to three intervention groups: jogging combined with dynamic open kinetic chain stretching (DS), jogging combined with dynamic closed kinetic chain stretching (lunge with eccentric hamstring windmills, LEC), and jogging only (CON) groups. Hamstring flexibility, muscle stiffness (area under the curve, AUC), joint position sense (JPS), maximal eccentric strength (ECC), and angle of peak torque (APT) were recorded before and immediately after the exercise interventions. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0191801PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5794078PMC
March 2018
8 Reads

Hamstring injuries are increasing in men's professional football: every cloud has a silver lining?

Authors:
Cristiano Eirale

Br J Sports Med 2018 Dec 23;52(23):1489. Epub 2018 Jan 23.

Sport Medicine Department, Aspetar Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.

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http://dx.doi.org/10.1136/bjsports-2017-098778DOI Listing
December 2018
3 Reads

Sex differences in muscle morphology of the knee flexors and knee extensors.

PLoS One 2018 23;13(1):e0190903. Epub 2018 Jan 23.

Arthritis Research UK Centre for Sport, Exercise and Osteoarthritis, Loughborough University, Leicestershire, United Kingdom.

Introduction: Females experience higher risk of anterior cruciate ligament (ACL) injuries; males experience higher risk of hamstring strain injuries. Differences in injury may be partially due to sex differences in knee flexor (KF) to knee extensor (KE) muscle size ratio and the proportional size of constituent muscles.

Purpose: To compare the absolute and proportional size, and mass distribution, of individual KE and KF muscles, as well as overall size and balance (size ratio) of these muscle groups between the sexes. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0190903PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5779647PMC
February 2018
6 Reads

Patellar Tendon Repair With Ipsilateral Semitendinosus Autograft Augmentation.

Arthrosc Tech 2017 Dec 13;6(6):e2177-e2181. Epub 2017 Nov 13.

Department of Orthopedic Surgery and Sports Medicine Center, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, U.S.A.

Patellar tendon ruptures are rare but potentially devastating injuries. Acute repair after patellar tendon rupture affords the best opportunity for tension-free restoration of the extensor mechanism. Biological augmentation of primary repair is believed to decrease strain across the repair site and reduce the risk of rerupture. Read More

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http://dx.doi.org/10.1016/j.eats.2017.08.013DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5765631PMC
December 2017
5 Reads

The Association of Vitamin D Status in Lower Extremity Muscle Strains and Core Muscle Injuries at the National Football League Combine.

Arthroscopy 2018 Apr 21;34(4):1280-1285. Epub 2017 Dec 21.

Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, U.S.A.

Purpose: To evaluate the association between serum vitamin D level and the prevalence of lower extremity muscle strains and core muscle injuries in elite level athletes at the National Football League (NFL) combine.

Methods: During the 2015 NFL combine, all athletes with available serum vitamin D levels were included for study. Baseline data were collected, including age, race, body mass index, position, injury history specific to lower extremity muscle strain or core muscle injury, and Functional Movement Screen scores. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S07498063173128
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http://dx.doi.org/10.1016/j.arthro.2017.10.005DOI Listing
April 2018
16 Reads

Predictive Modeling of Hamstring Strain Injuries in Elite Australian Footballers.

Med Sci Sports Exerc 2018 05;50(5):906-914

School of Exercise Science, Australian Catholic University, Melbourne, AUSTRALIA.

Purpose: Three of the most commonly identified hamstring strain injury (HSI) risk factors are age, previous HSI, and low levels of eccentric hamstring strength. However, no study has investigated the ability of these risk factors to predict the incidence of HSI in elite Australian footballers. Accordingly, the purpose of this prospective cohort study was to investigate the predictive ability of HSI risk factors using machine learning techniques. Read More

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http://dx.doi.org/10.1249/MSS.0000000000001527DOI Listing
May 2018
7 Reads

Eccentric hamstring strength deficit and poor hamstring-to-quadriceps ratio are risk factors for hamstring strain injury in football: A prospective study of 146 professional players.

J Sci Med Sport 2018 Aug 5;21(8):789-793. Epub 2017 Dec 5.

Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.

Objectives: The purpose of this study was to investigate whether preseason isokinetic strength measures were predictive of future HSI among professional football players.

Design: Prospective cohort study, Level of evidence 2.

Methods: A total of 169 professional players participated in a preseason isokinetic strength screening, followed by a 10-month competitive season. Read More

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http://dx.doi.org/10.1016/j.jsams.2017.11.017DOI Listing
August 2018
25 Reads

Biceps femoris fascicle length during passive stretching.

J Electromyogr Kinesiol 2018 Feb 5;38:119-125. Epub 2017 Dec 5.

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

The purpose of this study was to quantify the relative changes in fascicle (FL) and muscle-tendon unit (LMTU) length of the long head of the biceps femoris (BFlh) at different combinations of hip and knee joint positions. Fourteen participants performed passive knee extension trials from 0°, 45° and 90° of hip flexion. FL, LMTU, pennation angle (PA) and effective FL (FL multiplied by the cosine of the PA) of the BFlh were quantified using ultrasonography (US). Read More

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http://dx.doi.org/10.1016/j.jelekin.2017.11.015DOI Listing
February 2018
14 Reads

Discussion about different cut-off values of conventional hamstring-to-quadriceps ratio used in hamstring injury prediction among professional male football players.

PLoS One 2017 7;12(12):e0188974. Epub 2017 Dec 7.

Spine Disorders and Paediatric Orthopaedics Department, Poznan University of Medical Science, Poznań, Poland.

Objective: To measure the sensitivity and specificity of differences cut-off values for isokinetic Hcon/Qcon ratio in order to improve the capacity to evaluate (retrospectively) the injury of hamstring muscles in professional soccer screened with knee isokinetic tests.

Design: Retrospective study.

Methods: Medical and biomechanical data of professional football players playing for the same team for at least one season between 2010 and 2016 were analysed. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0188974PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5720729PMC
December 2017
11 Reads

Sprint and jump performance in elite male soccer players following a 10-week Nordic Hamstring exercise Protocol: a randomised pilot study.

BMC Res Notes 2017 Dec 4;10(1):669. Epub 2017 Dec 4.

Sports Orthopedic Research Center-Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital, Kettegaard Alle 30, Hvidovre, Denmark.

Objective: The preseason Nordic Hamstring Protocol (NHP) reduces hamstring strain injuries in football players. Despite persisting injury rates, elite clubs are reluctant to apply the NHP often over concerns of negative impacts on performance. This pilot study investigated if sprint or jump-performance outcomes tended to increase or decrease following implementation of the NHP in elite male soccer-players. Read More

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http://dx.doi.org/10.1186/s13104-017-2986-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5716363PMC
December 2017
7 Reads

Isokinetic strength assessment offers limited predictive validity for detecting risk of future hamstring strain in sport: a systematic review and meta-analysis.

Br J Sports Med 2018 Mar 29;52(5):329-336. Epub 2017 Nov 29.

La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne, Victoria, Australia.

Objective: To examine the value of isokinetic strength assessment for predicting risk of hamstring strain injury, and to direct future research into hamstring strain injuries.

Design: Systematic review.

Data Sources: Database searches for Medline, CINAHL, Embase, AMED, AUSPORT, SPORTDiscus, PEDro and Cochrane Library from inception to April 2017. Read More

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http://bjsm.bmj.com/lookup/doi/10.1136/bjsports-2017-098101
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http://dx.doi.org/10.1136/bjsports-2017-098101DOI Listing
March 2018
26 Reads