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Repetitive strain injury

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https://www.readbyqxmd.com/read/27909377/association-between-body-composition-and-sport-injury-in-canadian-adolescents
#1
Allison M Ezzat, Amy Schneeberg, Mieke Koehoorn, Carolyn A Emery
Purpose: To examine the association between overweight or obesity and sport injury in a population-based sample of Canadian adolescents. Methods: Cross-sectional analyses were performed using the Canadian Community Health Survey (2009-2010), a nationally representative sample (n=12,407) of adolescents aged 12-19 years. Body composition was quantified using BMI, grouping participants into healthy weight, overweight, or obese. The outcome of interest was acute or repetitive strain injury sustained during sport in the previous year...
2016: Physiotherapy Canada. Physiothérapie Canada
https://www.readbyqxmd.com/read/27870698/risk-factors-for-injury-among-japanese-collegiate-players-of-american-football-based-on-performance-test-results
#2
Junta Iguchi, Yuya Watanabe, Misaka Kimura, Yoshihiko Fujisawa, Tatsuya Hojo, Yasuhiro Yuasa, Shinsuke Higashi, Kenji Kuzuhara
Iguchi, J, Watanabe, Y, Kimura, M, Fujisawa, Y, Hojo, T, Yuasa, Y, Higashi, S, and Kuzuhara, K. Risk factors for injury among Japanese collegiate players of American football based on performance test results. J Strength Cond Res 30(12): 3405-3411, 2016-The purpose of this study was to identify how risk factors for injury during American football are related to players' physical strength as determined using typical performance tests. One hundred 53 Japanese collegiate players of American football were recruited for this study...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27814563/age-related-differences-in-the-timing-aspect-of-lumbopelvic-rhythm-during-trunk-motion-in-the-sagittal-plane
#3
Milad Vazirian, Iman Shojaei, Babak Bazrgari
Forward bending and backward return of the human trunk in the sagittal plane are associated with a specific lumbopelvic rhythm, which consists of magnitude and timing aspects. In this study, the age-related differences in the timing aspect of lumbopelvic rhythm were investigated using the continuous relative phase method. Specifically, the mean absolute relative phase (MARP) between the thoracic and pelvic motions as well as variation in MARP under repetitive motions, denoted by deviation phase (DP), were characterized in sixty participants between 20 and 70years old...
November 1, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27732325/stress-fractures-concepts-and-therapeutics
#4
Carolina A Moreira, John P Bilezikian
CONTEXT: Stress fractures are repetitive use injuries in which recurrent strains lead to material fatigue and microarchitectural discontinuities. Stress fractures account for up to 20% of athletic injuries, more commonly sustained by women and in those who engage in track-and-field events. The pathogenesis of stress fractures is multifactorial. Although most stress fracture are reported among women who may experience menstrual disturbances, low body mass index, low energy intake and sometimes low bone mass, these individuals do not regularly seek endocrinological attention...
October 12, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27698067/cardiac-consequences-of-autonomic-dysreflexia-in-spinal-cord-injury
#5
Christopher R West, Jordan W Squair, Laura McCracken, Katharine D Currie, Rishi Somvanshi, Violet Yuen, Aaron A Phillips, Ujendra Kumar, John H McNeill, Andrei V Krassioukov
Autonomic dysreflexia (AD), which describes episodic hypertension, is highly prevalent in people with spinal cord injury (SCI). In non-SCI, primary hypertension depresses cardiac contractile reserve via β-adrenergic mechanisms. In this study, we investigated whether AD contributes to the impairment in cardiac contractile function that accompanies SCI. We induced SCI in rodents and stratified them into sham, SCI, or SCI plus repetitive induction of AD. At 6-week post-SCI, we assessed cardiac function using in vivo (speckle-tracking echocardiography), ex vivo (working heart), and molecular approaches (Western blot)...
November 2016: Hypertension
https://www.readbyqxmd.com/read/27681217/occupational-injuries-and-diseases-among-commercial-fishers-in-finland-1996-2015
#6
Kim O Kaustell, Tiina E A Mattila, Risto H Rautiainen
BACKGROUND: Commercial fishing is recognised as one of the most hazardous professions worldwide. In Finland, commercial fishing has some special characteristics, including fishing on ice during frozen waters, and pluriactivity of the fisher family to gain additional income. The goal of this study was to describe injury characteristics among commercial fishers in Finland during the years 1996-2015. With this information, we wish to promote creation of effective safety campaigns and interventions...
2016: International Maritime Health
https://www.readbyqxmd.com/read/27633493/the-revised-strain-index-an-improved-upper-extremity-exposure-assessment-model
#7
Arun Garg, J Steven Moore, Jay M Kapellusch
The Revised Strain Index (RSI) is a distal upper extremity (DUE) physical exposure assessment model based on: intensity of exertion, frequency of exertion, duration per exertion, hand/wrist posture and duration of task per day. The RSI improves upon the 1995 Strain Index (SI) by using continuous rather than categorical multipliers, and replacing duty cycle with duration per exertion. In a simulation of 13,944 tasks, the RSI and 1995 SI showed good agreement in risk predictions for 1995 SI scores ≤3 (safe) and >13...
October 14, 2016: Ergonomics
https://www.readbyqxmd.com/read/27632836/ankle-position-during-the-nordic-curl-does-not-affect-muscle-activity-of-the-biceps-femoris-and-medial-gastrocnemius
#8
Paul Comfort, Amy Regan, Lee Herrington, Chris Thomas, John McMahon, Paul Jones
CONTEXT: Regular performance (~2 x week) of Nordic curls has been shown to increase hamstring strength and reduce the risk of hamstring strain injury, although no consensus on ankle position has been provided. OBJECTIVE: The aim of this study was to compare the effects of performing Nordic curls, with the ankle in a dorsiflexed (DF) or plantar flexed (PF) position, on muscle activity of the biceps femoris (BF) and medial gastrocnemius (MG). PARTICIPANTS: Fifteen (age 22...
August 24, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27554021/probing-multi-scale-mechanical-damage-in-connective-tissues-using-x-ray-diffraction
#9
Fabio Bianchi, Felix Hofmann, Andrew J Smith, Mark S Thompson
: The accumulation of microstructural collagen damage following repetitive loading is linked to painful and debilitating tendon injuries. As a hierarchical, semi-crystalline material, collagen mechanics can be studied using X-ray diffraction. The aim of the study was to describe multi-structural changes in tendon collagen following controlled plastic damage (5% permanent strain). We used small angle X-ray scattering (SAXS) to interrogate the spacing of collagen molecules within a fibril, and wide angle X-ray scattering (WAXS) to measure molecular strains under macroscopic loading...
November 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27542101/proximal-forearm-extensor-muscle-strain-is-reduced-when-driving-nails-using-a-shock-controlled-hammer
#10
Kimberly A Buchanan, Maria Maza, Carlos E Pérez-Vázquez, Thomas Y Yen, Richard Kijowski, Fang Liu, Robert G Radwin
BACKGROUND: Repetitive hammer use has been associated with strain and musculoskeletal injuries. This study investigated if using a shock-control hammer reduces forearm muscle strain by observing adverse physiological responses (i.e. inflammation and localized edema) after use. METHODS: Three matched framing hammers were studied, including a wood-handle, steel-handle, and shock-control hammer. Fifty volunteers were randomly assigned to use one of these hammers at a fatiguing pace of one strike every second, to seat 20 nails in a wood beam...
October 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27458580/occupational-health-and-safety-of-finnish-dairy-farmers-using-automatic-milking-systems
#11
Janne P Karttunen, Risto H Rautiainen, Christina Lunner-Kolstrup
INTRODUCTION: Conventional pipeline and parlor milking expose dairy farmers and workers to adverse health outcomes. In recent years, automatic milking systems (AMS) have gained much popularity in Finland, but the changes in working conditions when changing to AMS are not well known. The aim of this study was to investigate the occupational health and safety risks in using AMS, compared to conventional milking systems (CMS). METHODS: An anonymous online survey was sent to each Finnish dairy farm with an AMS in 2014...
2016: Frontiers in Public Health
https://www.readbyqxmd.com/read/27302153/groin-injuries-athletic-pubalgia-and-return-to-play
#12
Osama Elattar, Ho-Rim Choi, Vickie D Dills, Brian Busconi
CONTEXT: Groin pain is a common entity in athletes involved in sports that require acute cutting, pivoting, or kicking such as soccer and ice hockey. Athletic pubalgia is increasingly recognized as a common cause of chronic groin and adductor pain in athletes. It is considered an overuse injury predisposing to disruption of the rectus tendon insertion to the pubis and weakness of the posterior inguinal wall without a clinically detectable hernia. These patients often require surgical therapy after failure of nonoperative measures...
July 2016: Sports Health
https://www.readbyqxmd.com/read/27150772/combination-of-therapeutic-ultrasound-with-antibiotics-interfere-with-the-growth-of-bacterial-culture-that-colonizes-skin-ulcers-an-in-vitro-study
#13
Elaine Caldeira de Oliveira Guirro, Dejanira de Franceschi de Angelis, Natanael Teixeira Alves de Sousa, Rinaldo Roberto de Jesus Guirro
Staphylococcus aureus and Escherichia coli are among the major bacterial species that colonize skin ulcers. Therapeutic ultrasound (TUS) produces biophysical effects that are relevant to wound healing; however, its application over a contaminated injury is not evidence-based. The objective of this research was to analyze the effect of TUS on in vitro-isolated S. aureus and E. coli, including the combination of ultrasound and antibiotics, in order to assess their antibiotic action on bacterial susceptibility...
September 2016: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/27134151/shoulder-pain-and-time-dependent-structure-in-wheelchair-propulsion-variability
#14
Chandrasekaran Jayaraman, Yaejin Moon, Jacob J Sosnoff
Manual wheelchair propulsion places considerable repetitive mechanical strain on the upper limbs leading to shoulder injury and pain. While recent research indicates that the amount of variability in wheelchair propulsion and shoulder pain may be related. There has been minimal inquiry into the fluctuation over time (i.e. time-dependent structure) in wheelchair propulsion variability. Consequently the purpose of this investigation was to examine if the time-dependent structure in the wheelchair propulsion parameters are related to shoulder pain...
July 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27059965/the-ergonomics-of-laparoscopic-surgery-a-quantitative-study-of-the-time-and-motion-of-laparoscopic-surgeons-in-live-surgical-environments
#15
Lucy Ping Aitchison, Cathy Kexin Cui, Amy Arnold, Erin Nesbitt-Hawes, Jason Abbott
BACKGROUND: Laparoscopic surgery presents multiple ergonomic difficulties for the surgeon, requiring awkward body postures and prolonged static muscle loading that increases risk of musculoskeletal strain and injury. This prospective study quantitatively measures the biomechanical movements of surgeons during laparoscopic procedures to determine at-risk movements from prolonged static muscle loading and repetitive motions that may lead to injury. METHODS: A total of 150 video recordings of 18 surgeons, standing at the patient's left, were captured from three fixed camera positions during live gynecological laparoscopic surgery...
April 8, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/26940576/incidence-rates-of-occupational-diseases-in-the-dutch-construction-sector-2010-2014
#16
Henk F van der Molen, Sanne C de Vries, S Jill Stocks, Jan Warning, Monique H W Frings-Dresen
OBJECTIVE: To estimate incidence and trends in incidence of occupational diseases (ODs) in the Dutch construction sector. METHODS: In a dynamic prospective cohort over a 5-year period (2010-2014), ODs assessed by occupational physicians (OPs) participating in a voluntary construction workers health surveillance (WHS) were reported to the Netherlands Centre for Occupational Diseases (NCOD). ODs were defined as a disease with a specific clinical diagnosis (International Classification of Diseases) that was predominantly caused by work-related factors as assessed by an OP...
May 2016: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/26925310/comparisons-of-eccentric-knee-flexor-strength-and-asymmetries-across-elite-sub-elite-and-school-level-cricket-players
#17
Wade J Chalker, Anthony J Shield, David A Opar, Justin W L Keogh
Background. There has been a continual increase in injury rates in cricket, with hamstring strain injuries (HSIs) being the most prominent. Eccentric knee flexor weakness and bilateral asymmetries are major modifiable risk factors for future HSIs. However, there is a lack of data relating to eccentric hamstring strength in cricket at any skill level. The objective of this study was to compare eccentric knee flexor strength and bilateral asymmetries in elite, sub-elite and school level cricket players; and to determine if playing position and limb role influenced these eccentric knee flexor strength indices...
2016: PeerJ
https://www.readbyqxmd.com/read/26909661/influence-of-repetitive-mechanical-loading-on-mmp2-activity-in-tendon-fibroblasts
#18
Elise Huisman, Alex Lu, Sarwat Jamil, Rouhollah Mousavizadeh, Robert McCormack, Clive Roberts, Alex Scott
Matrix metalloproteinase2 has been implicated in tendon pathology caused by repetitive movements. However, its activity in the early stages of the tendon's response to overuse, and its presence in the circulation as a possible indicator of tendon degradation, remain unknown. Human tendon cells were repetitively stretched for 5 days, and the rabbit Achilles tendon complex underwent repetitive motion 3× per week for 2 weeks. Quantitative polymer chain reaction analysis was performed to detect matrix metalloproteinase2/14 and tissue inhibitor of matrix metalloproteinase2 messenger ribonucleic acid of cells and rabbit tissue, and matrix metalloproteinase2 protein levels were determined with an enzyme linked immunoassay...
November 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/26856801/understanding-decision-making-towards-housework-among-women-with-upper-limb-repetitive-strain-injury
#19
Therma W C Cheung, Lindy Clemson, Kate O'Loughlin, Russell Shuttleworth
BACKGROUND: Among women with upper limb repetitive strain injury (RSI), occupational therapy interventions include education to facilitate ergonomic practices in housework. From a client-centred perspective, an understanding of women's decision-making about housework is needed to design effective occupational therapy programmes. This study addresses a gap in research in this area by exploring women's views about changing housework habits. AIM: The aim was to construct a conceptual representation to explain decision-making in housework by drawing on experiences of a sample of Singapore Chinese women with upper limb RSI from one hand therapy clinic...
February 2016: Australian Occupational Therapy Journal
https://www.readbyqxmd.com/read/26797043/ankle-position-during-the-nordic-curl-does-not-affect-muscle-activity-of-the-biceps-femoris-and-medial-gastrocnemius
#20
Paul Comfort, Amy Regan, Lee Herrington, Chris Thomas, John McMahon, Paul Jones
CONTEXT: Regular performance (~2 x week) of Nordic curls has been shown to increase hamstring strength and reduce the risk of hamstring strain injury, although no consensus on ankle position has been provided. OBJECTIVE: The aim of this study was to compare the effects of performing Nordic curls, with the ankle in a dorsiflexed (DF) or plantar flexed (PF) position, on muscle activity of the biceps femoris (BF) and medial gastrocnemius (MG). PARTICIPANTS: Fifteen (age 22...
January 18, 2016: Journal of Sport Rehabilitation
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