470 results match your criteria Swimmer's Shoulder


A Novel Method for the Determination of Exostosis Severity in the External Auditory Canal.

Clin Otolaryngol 2021 Jun 17. Epub 2021 Jun 17.

Sports Science Institute, Sydney, NSW, Australia, 2000.

Exostosis is a benign, irreversible growth of bone in the external auditory canal commonly seen in aquatic enthusiasts such as surfers and swimmers. Traditional assessment of the severity of exostosis is by visual estimate during otoscopic exam, with four grades; Grade 0 (no identifiable exostosis), Grade 1 (less than 33 percent obstruction), Grade 2 (≥34% to ≤ 66% obstruction) or Grade 3 (> 67% obstruction). Gold standard diagnostic assessment of exostosis severity is traditionally via computerized tomography; however, this technique exposes the patient to high dose radiation, is expensive and cannot typically be conducted during appointments. Read More

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Numerical simulations of a swimmer's head and cap wearing different types of goggles.

Sports Biomech 2021 Jun 3:1-13. Epub 2021 Jun 3.

Research Center in Sports Science, Health and Human Development, Covilhã, Portugal.

The aim of this study was to analyse the effect of swimming goggles on swimming hydrodynamics by numerical simulations. An elite swimmer volunteered for this research. The swimmer's head was scanned both without goggles, and while wearing 3 different types of goggles (Nikko, Ankor and Swedish). Read More

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Patient Positioning Guidelines for Gastrointestinal Endoscopic Procedures.

Gastroenterol Nurs 2021 May-Jun 01;44(3):185-191

Vera Meeusen, PhD, MA, RN, FACPAN, AFACHSM, is Clinical Nurse Consultant, Endoscopy Unit, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia.

Patient positioning during gastrointestinal endoscopic procedures has received minimal attention compared with surgical procedures performed in the surgical setting. However, prolonged endoscopic interventions on patients and the increasing requirement for general anesthesia have changed to need for patient positioning guidelines. The objective of this study was to test whether patient positioning guidelines for surgical procedures in surgical suites are suitable for gastrointestinal endoscopic procedures without negatively impacting safety and procedure duration. Read More

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A temporal analysis of the swimmers' coordination in the relay start.

Sports Biomech 2021 May 20:1-10. Epub 2021 May 20.

Social Sciences, Physical Activity, Sport and Leisure Department, Universidad Politécnica de Madrid, Madrid, Spain.

The main aims of the present research were 1) to characterise the inter-subject and intra-subject timing of the preparatory movements of competitive swimmers during relay starts and 2) to relate the preparatory movements with the relay start outcome. Nine international youth swimmers performed 10 relay freestyle starts (one-step technique) filmed at 120 Hz from a lateral viewpoint. Results obtained (0. Read More

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Regimes of motion of magnetocapillary swimmers.

Eur Phys J E Soft Matter 2021 Apr 24;44(4):59. Epub 2021 Apr 24.

Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Fürther Straße 248, 90429, Nuremberg, Germany.

The dynamics of a triangular magnetocapillary swimmer is studied using the lattice Boltzmann method. We extend on our previous work, which deals with the self-assembly and a specific type of the swimmer motion characterized by the swimmer's maximum velocity centred around the particle's inverse viscous time. Here, we identify additional regimes of motion. Read More

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Avian schistosome species in Danish freshwater lakes: relation to biotic and abiotic factors.

J Helminthol 2021 Apr 20;95:e22. Epub 2021 Apr 20.

Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 7, DK-1870Frederiksberg C, Denmark.

Due to the increased prevalence of human infections with bird schistosome larvae (cercarial dermatitis) associated with bathing in Danish lakes, a nationwide survey of infected intermediate host snails was conducted in 2018-2020. Pulmonate snails (10,225 specimens) were collected from 39 freshwater lakes (in the four major geographic regions in Denmark) and subjected to shedding. Released schistosome cercariae were isolated and identified by polymerase chain reaction and sequencing whereby Trichobilharzia regenti, Trichobilharzia franki, Trichobilharzia szidati and Trichobilharzia anseri were recorded. Read More

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Non-coding Regions of Mitochondrial DNA and the cox1 Gene Reveal Genetic Variability Among Local Belarusian Populations of the Causative Agent of Cercarial Dermatitis, Bird Schistosome Trichobilharzia szidati (Digenea: Schistosomatidae).

Acta Parasitol 2021 Apr 15. Epub 2021 Apr 15.

Laboratory of Genome Organization, Institute of Gene Biology of the Russian Academy of Sciences, Moscow, Russia.

Introduction: The cercariae of avian blood flukes Trichobilharzia szidati (Digenea, Schistosomatidae) are known to cause cercarial allergic dermatitis ("swimmer's itch") in humans. Global epidemics can have significant impacts on local tourism-related economies in recreational areas. Little is known about the genetic polymorphism of the parasite population, or about the variability of the non-coding regions of mitochondrial DNA (mtDNA) and the possibility of using this as a genetic marker. Read More

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Shaping the gradients driving phoretic micro-swimmers: influence of swimming speed, budget of carbonic acid and environment.

Eur Phys J E Soft Matter 2021 Mar 23;44(3):41. Epub 2021 Mar 23.

Institute of Condensed Matter Physics, Johannes Gutenberg Universität, Staudinger Weg 7, 55128, Mainz, Germany.

pH gradient-driven modular micro-swimmers are investigated as a model for a large variety of quasi-two-dimensional chemi-phoretic self-propelled entities. Using three-channel micro-photometry, we obtain a precise large field mapping of pH at a spatial resolution of a few microns and a pH resolution of [Formula: see text] units for swimmers of different velocities propelling on two differently charged substrates. We model our results in terms of solutions of the three-dimensional advection-diffusion equation for a 1:1 electrolyte, i. Read More

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Base flow decomposition for complex moving objects in linear hydrodynamics: Application to helix-shaped flagellated microswimmers.

Phys Rev E 2021 Feb;103(2-1):023109

Department of Physics, INFN, University of Rome, Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy.

The motion of microswimmers in complex flows is ruled by the interplay between swimmer propulsion and the dynamics induced by the fluid velocity field. Here we study the motion of a chiral microswimmer whose propulsion is provided by the spinning of a helical tail with respect to its body in a simple shear flow. Thanks to an efficient computational strategy that allowed us to simulate thousands of different trajectories, we show that the tail shape dramatically affects the swimmer's motion. Read More

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February 2021

A simple microswimmer model inspired by the general equation for nonequilibrium reversible-irreversible coupling.

J Chem Phys 2020 May;152(19):194902

Global Station for Soft Matter, GI-CoRE, Hokkaido University, Sapporo, Hokkaido 060-0808, Japan.

A simple mean-field microswimmer model is presented. The model is inspired by the nonequilibrium thermodynamics of multi-component fluids that undergo chemical reactions. These thermodynamics can be rigorously described in the context of the GENERIC (general equation for the nonequilibrium reversible-irreversible coupling) framework. Read More

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Dermatological and Molecular Evidence of Human Cercarial Dermatitis in North-Eastern Poland.

Vector Borne Zoonotic Dis 2021 Apr 9;21(4):269-274. Epub 2021 Feb 9.

Department of Medical Biology, School of Public Health, Collegium Medicum, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.

Swimmer's itch or human cercarial dermatitis (HCD) appears as a skin rash caused by an allergic reaction to larval (cercariae) flatworm parasites of the family In our study, two cases of HCD were analyzed; both of them were reported in people swimming in Lake Pluszne. In the summer of 2018, a sample of 397 snails was collected at swimming sites in that area. Five (1. Read More

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Evidence of a Putative Novel Species of Avian Schistosome Infecting Planorbella trivolvis.

J Parasitol 2021 01;107(1):89-97

357 South Academic Building, School of Public Health, University of Alberta, 116 St. and 85th Avenue, Alberta, Canada T6G 2R3.

Freshwater gastropods of the genera Lymnaea Lamarck, 1799, Physa Draparnaud, 1801, Gyraulus Charpentier, 1837, Radix Montfort, 1810, and Stagnicola Jeffreys, 1830 are considered suitable intermediate hosts for avian schistosomes. A large trematode biodiversity survey performed across 3 yr on 6 lakes in Alberta confirmed 3 already-reported snail hosts for 7 North American avian schistosomes; however, the cytochrome c oxidase subunit 1 (COI) nucleotide sequence from 1 cercarial sample (from a single specimen of Planorbella trivolvis) was distinct from all other COI schistosome sequences. As part of a simultaneous, comparable study of P. Read More

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January 2021

Pressure Injury Prevention in COVID-19 Patients With Acute Respiratory Distress Syndrome.

Front Med (Lausanne) 2020 22;7:558696. Epub 2021 Jan 22.

Monash Nursing and Midwifery, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, Australia.

Coronavirus disease 2019 (COVID-19), which is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), was identified in China in December 2019 and became a pandemic in a short period of time. While most infected people might have mild symptoms, older people and people with chronic illnesses may develop acute respiratory distress syndrome (ARDS). Patients with ARDS with worsening hypoxemia require prone positioning to improve the respiratory mechanics and oxygenation. Read More

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January 2021

The relationship between training load and pain, injury and illness in competitive swimming: A systematic review.

Phys Ther Sport 2021 Mar 9;48:154-168. Epub 2021 Jan 9.

Department of Physical Education and Sport Sciences, University of Limerick, Limerick, Ireland; Health Research Institute, University of Limerick, Limerick, Ireland.

Background: Research suggests that the frequency of training, combined with the repetitive motion involved in high volume swimming can predispose swimmers to symptoms of over-training. The prevention of pain, injury and illness is of paramount importance in competitive swimming in order to maximise a swimmer's ability to train and perform consistently. A significant factor in the prevention of pain, injury or illness is the appropriate load monitoring and management practices within a training programme. Read More

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A Kinematics Comparison of Different Swimming Relay Start Techniques.

J Sports Sci 2021 May 18;39(10):1105-1113. Epub 2020 Dec 18.

Facultad de Ciencias de la Actividad Física y del Deporte (INEF), Universidad Politécnica de Madrid, Madrid, Spain.

In swimming relay races, various start techniques are performed by swimmers, but it remains unclear which technique leads to a better start performance. Therefore, the purpose of the present study was to compare the kinematic characteristics of different relay start techniques with the new starting block Omega OSB11. Eleven international youth swimmers were filmed during 1) no step with parallel feet, 2) no step with separated feet and 3) one-step starts and their centre of mass kinematics calculated with 2D-DLT algorithms. Read More

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Descriptive Pathological Study of Avian Schistosomes Infection in Whooper Swans () in Japan.

Animals (Basel) 2020 Dec 10;10(12). Epub 2020 Dec 10.

Department of Zoonoses, Faculty of Veterinary Medicine, Sohag University, Sohag 82524, Egypt.

Cercarial dermatitis, or Swimmer's itch, is one of the emerging diseases caused by the cercariae of water-borne schistosomes, mainly spp. Since the zoonotic potential of is still unknown, studies on this schistosome would be helpful to add knowledge on its possible role in causing human infections. In the present study, 54 whooper swans () from rescue/rehabilitation centers in Honshu, Japan, were necropsied to identify the cause of death. Read More

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December 2020

Gliding performance is affected by cranial movement of abdominal organs.

Sci Rep 2020 12 8;10(1):21430. Epub 2020 Dec 8.

Department of Internal Medicine and Rehabilitation Science, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.

Swimming is an extremely popular sport around the world. The streamlined body position is a crucial and foundational position for swimmers. Since the density of lungs is low, the center of buoyancy is always on the cranial side and the center of gravity is always on the caudal side. Read More

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December 2020

Learning hydrodynamic signatures through proprioceptive sensing by bioinspired swimmers.

Bioinspir Biomim 2020 Dec 3. Epub 2020 Dec 3.

Mechanical Engineering, Clemson University, 200 EIB, Clemson University, Clemson, South Carolina, 29634, UNITED STATES.

Objects moving in water or stationary objects in streams create a vortex wake. Such vortex wakes encode information about the objects and the flow conditions. Underwater robots that often function with constrained sensing capabilities can benefit from extracting this information from vortex wakes. Read More

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December 2020

An assessment of chlorine stain and collegiate swimmers.

Can J Dent Hyg 2019 Oct 1;53(3):166-171. Epub 2019 Oct 1.

Associate professor and biostatistician, Department of Family and Community Medicine, University of New Mexico, Albuquerque, NM, USA.

Background: Swimming is known worldwide as one of the healthiest, low-impact forms of exercise that promotes a strong body, heart, and mind. However, several studies have suggested that swimming pool chlorination is responsible for dental erosion, calculus formation, and stain in competitive and recreational swimmers, a phenomenon known as swimmer's mouth. The purpose of this observational study was to assess chlorine stain on the dentition of competitive female swimmers and divers from a university team and to determine if dental preventive practices affected chlorine stains. Read More

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October 2019

Diving into a Simple Anguilliform Swimmer's Sensitivity.

Integr Comp Biol 2020 11;60(5):1236-1250

Department of Mathematics and Statistics, The College of New Jersey, 2000 Pennington Road, Ewing Township, NJ 08628, USA.

Computational models of aquatic locomotion range from modest individual simple swimmers in 2D to sophisticated 3D multi-swimmer models that attempt to parse collective behavioral dynamics. Each of these models contain a multitude of model input parameters to which its outputs are inherently dependent, that is, various performance metrics. In this work, the swimming performance's sensitivity to parameters is investigated for an idealized, simple anguilliform swimming model in 2D. Read More

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November 2020

Training Intensity and Shoulder Musculoskeletal Physical Quality Responses in Competitive Swimmers.

J Athl Train 2020 Nov 11. Epub 2020 Nov 11.

Centre for Health Sciences, School of Health and Society, University of Salford, Manchester, United Kingdom.

Context: Shoulder pain is the main cause of missed or modified training in competitive swimmers. Shoulder musculoskeletal maladaptations occur to some extent as a consequence of training loads during swimming that may increase the risk of shoulder injury. Further evidence is needed to understand the training intensities at which these maladaptations occur. Read More

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November 2020

First confirmed record of Trichobilharzia franki Müller & Kimmig, 1994, from Radix auricularia (Linnaeus, 1758) for Austria.

Parasitol Res 2020 Dec 5;119(12):4135-4141. Epub 2020 Nov 5.

3rd Zoological Department, Natural History Museum Vienna, Burgring 7, 1010, Vienna, Austria.

Avian schistosomes are of medical and veterinary importance as they are responsible for the annually occurring cercarial dermatitis outbreaks. For Austria, so far, only Trichobilharzia szidati Neuhaus 1952 was confirmed on species level as causative agent of cercarial dermatitis. Here we present the first record of Trichobilharzia franki Müller & Kimmig 1994 in Austria. Read More

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December 2020

Predicting dive start performance from kinematic variables at water entry in (sub-)elite swimmers.

PLoS One 2020 30;15(10):e0241345. Epub 2020 Oct 30.

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

The dive start is an important component of competitive swimming, especially at shorter race distances. Previous research has suggested that start performance depends on kinematic variables pertaining to the swimmer at water entry, notably the distance from the block, the horizontal velocity of the centre of mass and the angle between body and water surface. However, the combined and relative contributions of these variables to start performance remain to be determined. Read More

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December 2020

Temperature and light effects on Trichobilharzia szidati cercariae with implications for a risk analysis.

Acta Vet Scand 2020 Sep 15;62(1):54. Epub 2020 Sep 15.

Laboratory of Aquatic Pathobiology, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 7, 1870, Frederiksberg C, Denmark.

Background: Cercarial dermatitis (swimmer's itch) caused by bird schistosome cercariae, released from intermediate host snails, is a common disorder also at higher latitudes. Several cases were observed in the artificial Danish freshwater Ringen Lake frequently used by the public for recreational purposes. The lake may serve as a model system when establishing a risk analysis for this zoonotic disease. Read More

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September 2020

Swimming Through Parameter Subspaces of a Simple Anguilliform Swimmer.

Integr Comp Biol 2020 11;60(5):1221-1235

Department of Mathematics and Statistics, The College of New Jersey, 2000 Pennington Road, Ewing Township, NJ 08628, USA.

Computational scientists have investigated swimming performance across a multitude of different systems for decades. Most models depend on numerous model input parameters and performance is sensitive to those parameters. In this article, parameter subspaces are qualitatively identified in which there exists enhanced swimming performance for an idealized, simple swimming model that resembles a Caenorhabditis elegans, an organism that exhibits an anguilliform mode of locomotion. Read More

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November 2020

A primer on proning in the emergency department.

J Am Coll Emerg Physicians Open 2020 Jul 4. Epub 2020 Jul 4.

Department of Emergency Medicine Cook County Health Chicago Illinois USA.

Historically, the prone position was used almost exclusively in the ICU for patients suffering from refractory hypoxemia due to acute respiratory distress syndrome (ARDS). Amidst the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, however, this technique has been increasingly utilized in settings outside of the ICU, particularly in the emergency department. With emerging evidence that patients diagnosed with COVID-19 who are not intubated and mechanically ventilated may benefit from the prone position, this strategy should not be isolated to only those with critical illness. Read More

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Nitric oxide debilitates the neuropathogenic schistosome Trichobilharzia regenti in mice, partly by inhibiting its vital peptidases.

Parasit Vectors 2020 Aug 20;13(1):426. Epub 2020 Aug 20.

Department of Parasitology, Faculty of Science, Charles University, Prague, Czechia.

Background: Avian schistosomes, the causative agents of human cercarial dermatitis (or swimmer's itch), die in mammals but the mechanisms responsible for parasite elimination are unknown. Here we examined the role of reactive nitrogen species, nitric oxide (NO) and peroxynitrite, in the immune response of mice experimentally infected with Trichobilharzia regenti, a model species of avian schistosomes remarkable for its neuropathogenicity.

Methods: Inducible NO synthase (iNOS) was localized by immunohistochemistry in the skin and the spinal cord of mice infected by T. Read More

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Monitoring the swimmer's training load: A narrative review of monitoring strategies applied in research.

Scand J Med Sci Sports 2020 Nov 11;30(11):2037-2043. Epub 2020 Sep 11.

Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.

The high incidence of injury during swim training and the increasing demands of the sports make monitoring of the swimmer's training load a key concept requiring further investigation. Research has previously introduced numerous methods for the purposes of monitoring the swimmer's training load, but a narrative review discussing the strengths and limitations of each method is lacking. Consequently, this narrative review aims to summarize the monitoring strategies that have been applied in research on competitive swimmers. Read More

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November 2020

The chemotactic swimming behavior of bird schistosome miracidia in the presence of compatible and incompatible snail hosts.

PeerJ 2020 16;8:e9487. Epub 2020 Jul 16.

Department of Invertebrate Zoology and Parasitology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Torun, Torun, Poland.

No effective method has yet been developed to prevent the threat posed by the emerging disease-cercarial dermatitis (swimmer's itch), caused by infective cercariae of bird schistosomes (Digenea: Schistosomatidae). In our previous studies, the New Zealand mud snail- (Gray, 1853; Gastropoda, Tateidae)-was used as a barrier between the miracidia of and the target snails . Since the presence of non-indigenous snails reduced the parasite prevalence under laboratory conditions, we posed three new research questions: (1) Do bird schistosomes show totally perfect efficacy for chemotactic swimming behavior? (2) Do the larvae respond to substances emitted by incompatible snail species? (3) Do the excretory-secretory products of incompatible snail species interfere with the search for a compatible snail host? The experiments were carried out in choice-chambers for the miracidia of and . Read More

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Experimental-numerical method for calculating bending moments in swimming fish shows that fish larvae control undulatory swimming with simple actuation.

PLoS Biol 2020 07 22;18(7):e3000462. Epub 2020 Jul 22.

Experimental Zoology Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands.

Most fish swim with body undulations that result from fluid-structure interactions between the fish's internal tissues and the surrounding water. Gaining insight into these complex fluid-structure interactions is essential to understand how fish swim. To this end, we developed a dedicated experimental-numerical inverse dynamics approach to calculate the lateral bending moment distributions for a large-amplitude undulatory swimmer that moves freely in three-dimensional space. Read More

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