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Journal articles on the topic 'Swimmers'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 June 2025

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1

Ramugade, Manoj, Kishor Sapkale, Sapna Sonkurla, and Abrar Sayed. "Evaluation of prevalence of dental erosion in swimmers in the metropolitan city of India: A cross-sectional study." International Journal of Orofacial Research 7, no. 1 (July 1, 2023): 13–19. http://dx.doi.org/10.56501/intjorofacres.v7i1.776.

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Introduction: Development and research in medical sciences have increased the life expectancy of the masses resulting in the retention of more teeth in the oral cavity. This leads to the occurrence of various wasting diseases of teeth like attrition, abrasion, and erosion. Aim and Objectives: This study evaluates the prevalence of Dental Erosion (DE) and its severity among swimmers of chlorinated pool water in a metropolitan city in India. Material and Methods: In this study, 508 young and adult regular swimmers (including competitive swimmers) from various swimming pools were selected and exa

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Tanaka, Takahiro, Satoru Hashizume, Toshiyuki Kurihara, and Tadao Isaka. "The Large and Strong Vortex Around the Trunk and Behind the Swimmer is Associated with Great Performance in Underwater Undulatory Swimming." Journal of Human Kinetics 84, no. 1 (October 25, 2022): 64–73. http://dx.doi.org/10.2478/hukin-2022-0087.

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Abstract Swimmers can produce horizontal body velocity by generating and shedding vortices around their body during underwater undulatory swimming (UUS). It has been hypothesized that the horizontal shedding velocity, area and circulation of the vortex around the swimmer’s body are associated with UUS performance. The purpose of this study was to investigate whether the shedding velocity, area and circulation of vortices around swimmers’ bodies are correlated with the horizontal body velocity during UUS. Computational fluid dynamics (CFD) was conducted to obtain the vortex structure during UUS

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3

Kenny, John, SarahJane Cullen, and Giles D. Warrington. "The “Ice-Mile”: Case Study of 2 Swimmers’ Selected Physiological Responses and Performance." International Journal of Sports Physiology and Performance 12, no. 5 (May 2017): 711–14. http://dx.doi.org/10.1123/ijspp.2016-0323.

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Purpose:“Ice-mile” swimming presents significant physiological challenges and potential safety issues, but few data are available. This study examined deep body temperature (BT), respiratory rate (RR), and swim performance in 2 swimmers completing an ice-mile swim of 1 mile (1600 m) in water less than 5°C.Methods:Two male cold-water-habituated swimmers completed a 1-mile lake swim in 3.9°C water. For comparative purposes, they completed an indoor 1-mile swim in 28.1°C water. The Equivital physiological monitoring system was used to record BT and RR before, during, and after each swim. Total ti

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Wu, Paul Pao-Yen, Toktam Babaei, Michael O’Shea, Kerrie Mengersen, Christopher Drovandi, Katie E. McGibbon, David B. Pyne, Lachlan J. G. Mitchell, and Mark A. Osborne. "Predicting performance in 4 x 200-m freestyle swimming relay events." PLOS ONE 16, no. 7 (July 15, 2021): e0254538. http://dx.doi.org/10.1371/journal.pone.0254538.

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Aim The aim was to predict and understand variations in swimmer performance between individual and relay events, and develop a predictive model for the 4x200-m swimming freestyle relay event to help inform team selection and strategy. Data and methods Race data for 716 relay finals (4 x 200-m freestyle) from 14 international competitions between 2010–2018 were analysed. Individual 200-m freestyle season best time for the same year was located for each swimmer. Linear regression and machine learning was applied to 4 x 200-m swimming freestyle relay events. Results Compared to the individual eve

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Virozub, Evgenia, Oren Wiezel, Alon Wolf, and Yizhar Or. "Planar Multi-Link Swimmers: Experiments and Theoretical Investigation using “Perfect Fluid” Model." Robotica 37, no. 08 (February 18, 2019): 1289–301. http://dx.doi.org/10.1017/s0263574718001510.

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SummaryRobotic swimmers are currently a subject of extensive research and development for several underwater applications. Clever design and planning must rely on simple theoretical models that account for the swimmer’s hydrodynamics in order to optimize its structure and control inputs. In this work, we study a planar snake-like multi-link swimmer by using the “perfect fluid” model that accounts for inertial hydrodynamic forces while neglecting viscous drag effects. The swimmer’s dynamic equations of motion are formulated and reduced into a first-order system due to symmetries and conservatio

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Hamidi Rad, Mahdi, Vincent Gremeaux, Fabien Massé, Farzin Dadashi, and Kamiar Aminian. "SmartSwim, a Novel IMU-Based Coaching Assistance." Sensors 22, no. 9 (April 27, 2022): 3356. http://dx.doi.org/10.3390/s22093356.

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Swimming coaches provide regular timed and technical feedback to swimmers and guide them efficiently in training sessions. Due to the complexity of swimmers’ performance, which is not visible in qualitative observation, quantitative and objective performance evaluation can better assist the coach in this regard. Inertial measurement units (IMUs) are used in swimming for objective performance evaluation. In this study, we propose a new performance evaluation feedback (SmartSwim) using IMU and investigate its effects on the swimmer’s weekly progress. Measurements were conducted each week with 15

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7

Hinrichs, Richard N., and Scott P. McLean. "A Mathematical Model of Competitive Swimming in Pools with Currents." International Journal of Sport Biomechanics 7, no. 2 (May 1991): 163–74. http://dx.doi.org/10.1123/ijsb.7.2.163.

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Swimmers may be placed at a disadvantage when water in a pool is actively circulated during competition. This circulation may produce currents in specific lanes which add to a swimmer’s speed in one direction and subtract from it in the other direction. This article presents a mathematical model of swimming in a lane with a current. It predicts that even small currents can add significantly to a swimmer’s race time. The effects of the current will not equal out over an even number of lengths swum because the swimmer always loses more time swimming against the current than he or she gains from

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Chambrion, Thomas, Laetitia Giraldi, and Alexandre Munnier. "Optimal strokes for driftless swimmers: A general geometric approach." ESAIM: Control, Optimisation and Calculus of Variations 25 (2019): 6. http://dx.doi.org/10.1051/cocv/2017012.

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Swimming consists by definition in propelling through a fluid by means of bodily movements. Thus, from a mathematical point of view, swimming turns into a control problem for which the controls are the deformations of the swimmer. The aim of this paper is to present a unified geometric approach for the optimization of the body deformations of so-called driftless swimmers. The class of driftless swimmers includes, among other, swimmers in a 3D Stokes flow (case of micro-swimmers in viscous fluids) or swimmers in a 2D or 3D potential flow. A general framework is introduced, allowing the complete

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9

van Rees, Wim M., Mattia Gazzola, and Petros Koumoutsakos. "Optimal morphokinematics for undulatory swimmers at intermediate Reynolds numbers." Journal of Fluid Mechanics 775 (June 19, 2015): 178–88. http://dx.doi.org/10.1017/jfm.2015.283.

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Undulatory locomotion is an archetypal mode of propulsion for natural swimmers across scales. Undulatory swimmers convert transverse body oscillations into forward velocity by a complex interplay between their flexural movements, morphological features and the fluid environment. Natural evolution has produced a wide range of morphokinematic examples of undulatory swimmers that often serve as inspiration for engineering devices. It is, however, unknown to what extent natural swimmers are optimized for hydrodynamic performance. In this work, we reverse-engineer the morphology and gait for fast a

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Maity, Ruma, and P. S. Burada. "Chemotaxis of two chiral squirmers." Physics of Fluids 35, no. 4 (April 2023): 043611. http://dx.doi.org/10.1063/5.0139016.

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External gradients can strongly influence the collective behavior of microswimmers. In this paper, under an external linear chemical gradient, we study the behavior of two hydrodynamically interacting self-propelled chiral swimmers in the low-Reynolds number regime. We use the generalized squirmer model called the chiral squirmer, a spherically shaped body with an asymmetric surface slip velocity, to represent the swimmer. We find that the external gradient favors the attraction between the swimmers and, in some situations, leads to a bounded state in which the swimmers move in a highly synchr

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Milić, Ognjen, Srđan Ostojić, and Veljko Vukićević. "Kinematic analysis of elite Portuguese swimmer with loco motor disability between Charcot-Marie-Tooth disease and arm amputees – Review study." Innovative Technologies in Sport and Physical Activity 3, no. 2 (December 1, 2024): 3–6. https://doi.org/10.56886/itspa.241201.

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The aim of this study was to compare biophysical characteristics of Paralympic swimmers. This case study includes two swimmers with loco motor disability classes S9, according to functional classification by international Paralympic committee – IPC. These swimmers completed a 7 x 200m crawl stroke protocol with increasing speed 0.05 05m s-1 in each level and 30s interval. Interval speeds were based on 400m race speed. VO2 consumption was measured each 200 meter directly and continuously with a telemetric portable gas analyzer (K4 b2, Cosmed, Rome, Italy) connected to a respiratory snorkel (Aqu

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Dingley, Andrew A., David B. Pyne, and Brendan Burkett. "Phases of the Swim-start in Paralympic Swimmers Are Influenced by Severity and Type of Disability." Journal of Applied Biomechanics 30, no. 5 (October 2014): 643–48. http://dx.doi.org/10.1123/jab.2013-0321.

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Disabilities in Paralympic swimming could impact a swimmer’s ability to execute an effective swim-start. We examined how swim-start performance differed between severity and type of physical disability. Swim-starts were measured in 55 elite Paralympic swimmers from eight different Paralympic classes; S14, S13, S10-S6, S3 grouped as no- (classes S13 & S14), low- (S9 & S10), mid- (S7 & S8) or high- (≤ S6) severity of physical disability and also by type of physical disability (upper, lower, and palsy) to provide meaningful comparisons. The swimmer’s competitive level was determined b

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Thakrar, Dr Zalak, Krupal J. Buddhadev, Harsh D. Bhatt, Nakul H. Bhadrecha, and Mathan D. Bhogayata. "Swimmer Safety Alert System for Encounters with Unidentified Marine Aquatic Animals." International Journal of Innovative Research in Computer Science and Technology 12, no. 4 (July 2024): 47–51. http://dx.doi.org/10.55524/ijircst.2024.12.4.8.

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The perilous encounters between swimmers and marine animals pose a significant risk to both human safety and the well-being of aquatic creatures. Every year, a distressing number of swimmers succumb to attacks by marine animals, often with neither party at fault. In response to this ongoing threat, the Swimmer Alert System emerges as a groundbreaking technology aimed at safeguarding both humans and marine life, ensuring their mutual protection without harm to either party. By utilizing advanced sensors and real-time monitoring, this system detects the presence of potentially dangerous marine a

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14

Ye, Chengwei, Jia Liu, Xinyu Wu, Ben Wang, Li Zhang, Yuanyi Zheng, and Tiantian Xu. "Hydrophobicity Influence on Swimming Performance of Magnetically Driven Miniature Helical Swimmers." Micromachines 10, no. 3 (March 6, 2019): 175. http://dx.doi.org/10.3390/mi10030175.

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Helical microswimmers have been involved in a wide variety of applications, ranging from in vivo tasks such as targeted drug delivery to in vitro tasks such as transporting micro objects. Over the past decades, a number of studies have been established on the swimming performance of helical microswimmers and geometrical factors influencing their swimming performance. However, limited studies have focused on the influence of the hydrophobicity of swimmers’ surface on their swimming performance. In this paper, we first demonstrated through theoretical analysis that the hydrophobicity of swimmer’

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Krishnamurthy, Deepak, and Ganesh Subramanian. "Collective motion in a suspension of micro-swimmers that run-and-tumble and rotary diffuse." Journal of Fluid Mechanics 781 (September 28, 2015): 422–66. http://dx.doi.org/10.1017/jfm.2015.473.

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Recent experiments have shown that suspensions of swimming micro-organisms are characterized by complex dynamics involving enhanced swimming speeds, large-scale correlated motions and enhanced diffusivities of embedded tracer particles. Understanding this dynamics is of fundamental interest and also has relevance to biological systems. The observed collective dynamics has been interpreted as the onset of a hydrodynamic instability, of the quiescent isotropic state of pushers, swimmers with extensile force dipoles, above a critical threshold proportional to the swimmer concentration. In this wo

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Allen, Sian V., Tom J. Vandenbogaerde, David B. Pyne, and Will G. Hopkins. "Predicting a Nation’s Olympic-Qualifying Swimmers." International Journal of Sports Physiology and Performance 10, no. 4 (May 2015): 431–35. http://dx.doi.org/10.1123/ijspp.2014-0314.

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Talent identification and development typically involve allocation of resources toward athletes selected on the basis of early-career performance.Purpose:To compare 4 methods for early-career selection of Australia’s 2012 Olympic-qualifying swimmers.Methods:Performance times from 5738 Australian swimmers in individual Olympic events at 101 competitions from 2000 to 2012 were analyzed as percentages of world-record times using 4 methods that retrospectively simulated early selection of swimmers into a talent-development squad. For all methods, squad-selection thresholds were set to include 90%

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Berdakin, Ivan, V. I. Marconi, and Adolfo J. Banchio. "Boosting micromachine studies with Stokesian dynamics." Physics of Fluids 34, no. 3 (March 2022): 037102. http://dx.doi.org/10.1063/5.0083528.

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Artificial microswimmers, nano- and microrobots, are essential in many applications from engineering to biology and medicine. We present a Stokesian dynamics study of the dynamical properties and efficiency of one of the simplest artificial swimmers, the three linked spheres swimmer (TLS), extensively shown to be an excellent and model example of a deformable micromachine. Results for two different swimming strokes are compared with an approximate solution based on point force interactions. While this approximation accurately reproduces the solutions for swimmers with long arms and strokes of

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18

Yuan, Zhi-Ming, Mingxin Li, Chun-Yan Ji, Liang Li, Laibing Jia, and Atilla Incecik. "Steady hydrodynamic interaction between human swimmers." Journal of The Royal Society Interface 16, no. 150 (January 2019): 20180768. http://dx.doi.org/10.1098/rsif.2018.0768.

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This study focuses on the hydrodynamic interaction between two or three human swimmers in competitive swimming. Although the swimming performance of a single swimmer has been widely examined, studies on the interaction between multiple competitive swimmers are very rare. Experiments showed evidence that the drag of a swimmer could be modified by the existence of the other adjacent competitors (Chatard & Wilson. 2003 Med. Sci. Sports Exerc . 35 , 1176–1181. ( doi:10.1249/01.MSS.0000074564.06106.1F )). The following questions arise: (1) what mechanism determines the interaction; (2) which po

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Amna Saleh Team, Yasar Saibah Ali. "The effect of special strength exercises based on parallel training (Circuit Training) in developing some physiological variables and achieving 100 breaststroke swimming for young people." Mustansiriyah Journal of Sports Science 6, no. 2 (April 7, 2024): 189–204. http://dx.doi.org/10.62540/mjss.2024.2.6.13.

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Special strength training exercises used by swimmers in order to build physical capabilities and improve physiological adaptation, because the success of the training process is measured by the extent of progress achieved by the swimmer and parallel training (Circuit Training) is a very effective and versatile method that targets multiple aspects of With specific breaks that can focus on strength You perform these exercises sequentially, moving from exercise to exercise with limited breaks, .importance of research in an attempt Employing the mechanism of giving exercises and training methods t

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Simões, Paulo, José Vasconcelos-Raposo, António Silva, and Helder Fernandes. "Effects of a Process-Oriented Goal Setting Model on Swimmer's Performance." Journal of Human Kinetics 32, no. 1 (May 1, 2012): 65–76. http://dx.doi.org/10.2478/v10078-012-0024-6.

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Effects of a Process-Oriented Goal Setting Model on Swimmer's Performance The aim of this work was to study the impact of the implementation of a mental training program on swimmers' chronometric performance, with national and international Portuguese swimmers, based on the goal setting model proposed by Vasconcelos-Raposo (2001). This longitudinal study comprised a sample of nine swimmers (four male and five female) aged between fourteen and twenty, with five to eleven years of competitive experience. All swimmers were submitted to an evaluation system during two years. The first season invol

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Suppes, Laura, Kacey Ernst, Leif Abrell, and Kelly Reynolds. "Validation of Questionnaire Methods to Quantify Recreational Water Ingestion." International Journal of Environmental Research and Public Health 15, no. 11 (November 1, 2018): 2435. http://dx.doi.org/10.3390/ijerph15112435.

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Swimming pool water ingestion volumes are necessary for assessing infection risk from swimming. Pool water ingestion volumes can be estimated by questionnaire or measuring a chemical tracer in swimmer urine. Questionnaires are often preferred to the chemical tracer method because surveys are less time consuming, but no research exists validating questionnaires accurately quantify pool water ingestion volumes. The objective of this study was to explore if questionnaires are a reliable tool for collecting pool water ingestion volumes. A questionnaire was issued at four pool sites in Tucson, Ariz

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Farutin, A., H. Wu, W. F. Hu, S. Rafaï, P. Peyla, M. C. Lai, and C. Misbah. "Analytical study for swimmers in a channel." Journal of Fluid Mechanics 881 (October 24, 2019): 365–83. http://dx.doi.org/10.1017/jfm.2019.751.

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There is an overabundance of microswimmers in nature, including bacteria, algae, mammalian cells and so on. They use flagellum, cilia or global shape changes (amoeboid motion) to move forward. In the presence of confining channels, these swimmers exhibit often non-trivial behaviours, such as accumulation at the wall, navigation and so on, and their swimming speed may be strongly influenced by the geometric confinement. Several numerical studies have reported that the presence of walls either enhances or reduces the swimming speed depending on the nature of the swimmer, and also on the confinem

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Zhu, L., E. Lauga, and L. Brandt. "Low-Reynolds-number swimming in a capillary tube." Journal of Fluid Mechanics 726 (May 31, 2013): 285–311. http://dx.doi.org/10.1017/jfm.2013.225.

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AbstractWe use the boundary element method to study the low-Reynolds-number locomotion of a spherical model microorganism in a circular tube. The swimmer propels itself by tangential or normal surface motion in a tube whose radius is of the order of the swimmer size. Hydrodynamic interactions with the tube walls significantly affect the average swimming speed and power consumption of the model microorganism. In the case of swimming parallel to the tube axis, the locomotion speed is always reduced (respectively, increased) for swimmers with tangential (respectively, normal) deformation. In all

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Quash, Tiffany Monique, and Angela K. Beale-Tawfeeq. "A Different View of Collegiate Swimming. Under the Umbrella of Title IX: Voices of Black Womxn Collegiate Swimmers at HBCUs." Journal of Black Sexuality and Relationships 10, no. 1-2 (June 2023): 149–68. http://dx.doi.org/10.1353/bsr.2023.a910433.

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Abstract: Research completed by Norwood (2010), Quash (2018), and Waller and Nor-wood (2009) examined the experiences of Black Womxn swimmers. These authors identified swimming participation’s constraints and its impact on Black Womxn in collegiate and/or recreational settings. Minimal research encompasses a summation of the generational and institutional experiences of Black Womxn Collegiate Swimmers from Historically Black Colleges and Universities (HBCUs) which no longer exist. Despite the success and experiences of Black Collegiate Swimmers and Olympians Lia Neal and Simone Manuel (both fr

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Губар, Іван, Вікторія Богуславська та Денис Балахтін. "ЕФЕКТИВНІСТЬ ПРОГРАМИ ТЕОРЕТИЧНОЇ ПІДГОТОВЛЕНОСТІ ПЛАВЦІВ НА ЕТАПІ ПОЧАТКОВОЇ ПІДГОТОВКИ". Physical culture sports and health of the nation, № 18(37) (28 січня 2025): 85–93. https://doi.org/10.31652/2071-5285-2024-18(37)-85-93.

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The theoretical training of a swimmer is an integral part of improving his sports form and is the basis for other aspects of training. Despite the importance of theoretical training, in the scientific and methodological literature on swimming there are contradictions between the obvious request for its implementation and the proper justification of its structure and content, the unevenness of the subject matter (and sometimes its absence) of informational material at all stages of preparation, as well as the inconsistency of the distribution of topics direction and tasks of stages of multi-yea

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Tor, Elaine, David L. Pease, and Kevin A. Ball. "How Does Drag Affect the Underwater Phase of a Swimming Start?" Journal of Applied Biomechanics 31, no. 1 (February 2015): 8–12. http://dx.doi.org/10.1123/jab.2014-0081.

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During the underwater phase of the swimming start drag forces are constantly acting to slow the swimmer down. The current study aimed to quantify total drag force as well as the specific contribution of wave drag during the underwater phase of the swimming start. Swimmers were towed at three different depths (surface, 0.5 m, 1.0 m) and four speeds (1.6, 1.9, 2.0, 2.5 m·s–1), totaling 12 conditions. Wave drag and total drag were measured for each trial. Mixed modeling and plots were then used to determine the relationships between each towing condition and the amount of drag acting on the swimm

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Khalid, Ghezwan, and Ghasan Adeeb. "A Comparative Study According to Angiotensin Genetic Diversity As Indicator for 30m Freestyle Swimming in Youth aged (15 – 16) Year Old." Journal of Physical Education 33, no. 2 (June 28, 2021): 31–38. http://dx.doi.org/10.37359/jope.v33(2)2021.1139.

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The orientation process done by coaches and academicians in swimmers’ selection was based on apparent indicators and somebody and physical indicators. Yet the development in genetic studies and applying it to each swimmer will be more accurate. The researchers aimed at studying the athlete’s genes, performance genes based on genetic studies so as to compare among the three versions of the gene and matching it to the corresponding physical abilities. This study sheds the light on swimmers’ orientation and selection through comparing genes a matter that can help specify what is suitable for 30m

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Dutia, Iain, Declan Curran, Adam Donohoe, Emma Beckman, and Sean Michael Tweedy. "Time cost associated with sports participation for athletes with high support needs: a time-motion analysis of tasks required for para swimming." BMJ Open Sport & Exercise Medicine 8, no. 4 (October 2022): e001418. http://dx.doi.org/10.1136/bmjsem-2022-001418.

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ObjectivesPeople with cerebral palsy and high support needs (CP&HSN) are profoundly inactive but also under-represented in studies evaluating physical activity interventions. Reasons for their exclusion have not been evaluated. We hypothesised that CP&HSN would be associated with high time costs of preparatory activities (eg, getting dressed/undressed), possibly contributing to low participation and under-representation. Accordingly, this pilot study aimed to: (1) evaluate whether the time required for preparatory activities was extremely different (≥3 SD) between swimmers with and wit

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Sandage, Mary J., Lauren A. Dunn, Ryleigh Edwards, and Sara Ann Pope. "Implications of Compression Race Suit on Forced Vital Capacity: Assessment Considerations for Paradoxical Vocal Fold Motion in Competitive Female Swimmers." American Journal of Speech-Language Pathology 29, no. 2 (May 8, 2020): 732–40. http://dx.doi.org/10.1044/2019_ajslp-19-00185.

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Purpose The purpose of this investigation was to quantify the extent to which forced vital capacity (FVC) in competitive swimmers may differ from nonswimmers and determine if compression race suits reduced FVC when compared to practice swimsuits. Identification of the differences in FVC between swimmers and nonswimmers as well as pulmonary function differences secondary to swimsuit construction may inform assessment of the competitive swimmer with paradoxical vocal fold motion (PVFM). Method Using a prospective, mixed within- and between-groups, repeated measures design with 10 female competit

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Sfyri, Eleni, Vasiliki Kefala, Effie Papageorgiou, Athena Mavridou, Apostolos Beloukas, and Efstathios Rallis. "Viral Cutaneous Infections in Swimmers: A Preliminary Study." Water 13, no. 23 (December 2, 2021): 3401. http://dx.doi.org/10.3390/w13233401.

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Molluscum contagiosum (MC) and warts are common viral infections of the skin. Data regarding the prevalence of MC and verruca in swimmers are very poor and lacking in the literature. The purpose of this study was to determine the incidence of Molluscum Contagiosum (MC) and warts cases among young competitive swimmers participating in Greek swimming clubs. Of 244 swimmers enrolled in this study, 12.3% reported MC and 43% warts, during their swimming career, diagnosed and treated by dermatologists. There was no difference between sexes for MC but diagnoses of warts were higher in females. Axilla

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Nakashima, Motomu, and Jacob Tebbe. "Analysis of Swimming Motion for a Swimmer with Unilateral Transradial Deficiency to Develop Better Training Paddles." Proceedings 49, no. 1 (June 15, 2020): 9. http://dx.doi.org/10.3390/proceedings2020049009.

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Devices for swimmers with arm amputation/deficiency have not been developed a lot and therefore many improvements can be realized. Although swimmers often use paddles during training, paddles on the market are basically for swimmers without amputation/deficiency. The objective of this study was to analyze the swimming motion of a swimmer with unilateral transradial deficiency and to obtain the findings for development of better training paddles. The crawl stroke was filmed for a swimmer with unilateral transradial deficiency. The body geometry as well as the joint motion based on the filmed im

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Muhsin, Ahmed Thamer. "Analytical Comparative Study of Some Kinematic Variables Affecting the Distances of 200 m. Freestyle Race." Journal of Physical Education 32, no. 3 (September 28, 2020): 107–13. http://dx.doi.org/10.37359/jope.v32(3)2020.1026.

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The study aimed at identifying some kinematic variables affecting the distances of 200m freestyle race among the swimmers of the Specialized School for Swimming. Three (3) swimmers have been intentionally chosen to be the subjects of the study. The kinematic variables of each player have been extracted by the motor analysis (kinovea) program and their data values then compared. In light of the results, the researcher found out clear big differences in the values of these variables among the swimmers themselves and between each distance of the race distances for each swimmer which led to a big

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Han, Endao, Lailai Zhu, Joshua W. Shaevitz, and Howard A. Stone. "Low-Reynolds-number, biflagellated Quincke swimmers with multiple forms of motion." Proceedings of the National Academy of Sciences 118, no. 29 (July 15, 2021): e2022000118. http://dx.doi.org/10.1073/pnas.2022000118.

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In the limit of zero Reynolds number (Re), swimmers propel themselves exploiting a series of nonreciprocal body motions. For an artificial swimmer, a proper selection of the power source is required to drive its motion, in cooperation with its geometric and mechanical properties. Although various external fields (magnetic, acoustic, optical, etc.) have been introduced, electric fields are rarely utilized to actuate such swimmers experimentally in unbounded space. Here we use uniform and static electric fields to demonstrate locomotion of a biflagellated sphere at low Re via Quincke rotation. T

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Toppaladoddi, S., and N. J. Balmforth. "Slender axisymmetric Stokesian swimmers." Journal of Fluid Mechanics 746 (April 1, 2014): 273–99. http://dx.doi.org/10.1017/jfm.2014.120.

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AbstractSlender-body theory is used to study axisymmetric swimmers propelled by motions of their surfaces. To leading order, the locomotion speed is given by an integral involving the fluid velocity at the surface of the slender body. Locomotion speeds are calculated for fixed-shape swimmers with prescribed fluid surface velocities and for impermeable swimmers driven by propagating surface waves. Next, the internal mechanics is considered, modelling the swimmer as a viscous fluid bounded by an elastic shell. Prescribed forces are exerted on the shell to drive both the internal and external flu

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Chen, Zhi Feng, Hai Sheng Fang, and Jun Tian. "The Effects of Swimmers Posture and Swimsuit on the Hydrodynamic Performance during Underwater Swimming." Applied Mechanics and Materials 327 (June 2013): 256–62. http://dx.doi.org/10.4028/www.scientific.net/amm.327.256.

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Computational calculation is conducted to evaluate the effects of the swimmers posture and swimsuit on the hydrodynamic performance using the Fluent code. Both steady and unsteady models are applied on a 2D geometry. It is found that the swimmers posture and swimsuit play an important role on the hydrodynamic performance. The unsteady modeling reveals the vortex formation, development and separation behind the feet, and predicts the variation of the forces on the swimmer by time. The results provide a basis theoretically for the swimmer to understand the effects of posture and swimsuit on the

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Hackett, Lisa J., and Jo Coghlan. "Swimsuits as uniforms: Bodily transformation, control and transgression." Clothing Cultures 10, no. 1 (September 1, 2023): 21–37. http://dx.doi.org/10.1386/cc_00066_1.

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This article considers how national swimsuits are more than team garments worn at international events such as the Olympics. In their development and construction as well as the public contexts within which they are worn, swimsuits have a long history of transforming and controlling swimmers’ bodies and when the swimsuit fails to control or transform, the swimmer rather than the swimsuit is blamed for any transgressions. This article follows the development of the competitive swimsuit from the Victorian era, which required swimmers to fully cover their body, through to the mid-twentieth centur

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Withers, Archie, and Sergio Maldonado. "On the swimming strategies to escape a rip current: a mathematical approach." Natural Hazards 108, no. 2 (April 22, 2021): 1449–67. http://dx.doi.org/10.1007/s11069-021-04740-7.

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AbstractRip currents represent significant hazards to swimmers all around the world. The danger arises when a misinformed swimmer uses an inadequate strategy to escape the rip, such as fighting the current directly. This can lead to fatigue, panic, and in some cases drowning. There exists a range of strategies put forward by experts (both lifeguards and scientists) to escape rip currents. However, these recommendations are based on a limited number of scientific studies and there is still much discrepancy surrounding the best strategy to escape a rip. Thus, here we present a simple, physics-ba

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Thompson, Kevin, Stephen Garland, and Fiona Lothian. "Assessment of an International Breaststroke Swimmer Using the 7 × 200-m Step Test." International Journal of Sports Physiology and Performance 1, no. 2 (June 2006): 172–75. http://dx.doi.org/10.1123/ijspp.1.2.172.

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Thompson and Cooper1 observed that improvements in the swimming speed at 2-mM and 6-mM lactate concentration coincided with improvements in competitive breaststroke performances, whereas Pyne et al2 concluded that changes in swimming speed at lactate threshold were not directly associated with competition performances in a mixed-stroke group of 12 elite swimmers. This case study presents data from eleven (7 × 200 m) step tests over a 3-year period for a world-class 200-m male breaststroke swimmer. Personal-best race times were reduced by 9.5 seconds over this period. For this individual, step-

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Weber, Pascal, Georgios Arampatzis, Guido Novati, Siddhartha Verma, Costas Papadimitriou, and Petros Koumoutsakos. "Optimal Flow Sensing for Schooling Swimmers." Biomimetics 5, no. 1 (March 9, 2020): 10. http://dx.doi.org/10.3390/biomimetics5010010.

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Fish schooling implies an awareness of the swimmers for their companions. In flow mediated environments, in addition to visual cues, pressure and shear sensors on the fish body are critical for providing quantitative information that assists the quantification of proximity to other fish. Here we examine the distribution of sensors on the surface of an artificial swimmer so that it can optimally identify a leading group of swimmers. We employ Bayesian experimental design coupled with numerical simulations of the two-dimensional Navier Stokes equations for multiple self-propelled swimmers. The f

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Amaro, Nuno, Daniel A. Marinho, Nuno Batalha, Mário C. Marques, and Pedro Morouço. "Reliability of Tethered Swimming Evaluation in Age Group Swimmers." Journal of Human Kinetics 41, no. 1 (July 8, 2014): 155–62. http://dx.doi.org/10.2478/hukin-2014-0043.

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AbstractThe aim of the present study was to examine the reliability of tethered swimming in the evaluation of age group swimmers. The sample was composed of 8 male national level swimmers with at least 4 years of experience in competitive swimming. Each swimmer performed two 30 second maximal intensity tethered swimming tests, on separate days. Individual force-time curves were registered to assess maximum force, mean force and the mean impulse of force. Both consistency and reliability were very strong, with Cronbach's Alpha values ranging from 0.970 to 0.995. All the applied metrics presente

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Lemyre, Pierre-Nicolas, Darren C. Treasure, and Glyn C. Roberts. "Influence of Variability in Motivation and Affect on Elite Athlete Burnout Susceptibility." Journal of Sport and Exercise Psychology 28, no. 1 (March 2006): 32–48. http://dx.doi.org/10.1123/jsep.28.1.32.

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Forty-four elite swimmers (F = 19, M = 25) participated in the present study designed to examine shifts along the self-determined motivation continuum, as well as swings in negative and positive affect, to predict susceptibility to athlete burnout. Each week the participants were asked to record positive and negative affect states. Swimmers’ affect swing was calculated using mean intraindividual standard deviation scores as an indicator of intraindividual variance. Every third week the athletes’ level of self-determined motivation to participate in swimming was compiled on a self-determination

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Slaughter, Mary H., Constance B. Christ, Rachel J. Stillman, and Richard A. Boileau. "The Fat-Free Body and Subcomponents of the Fat-Free Body to Height Relationship between Swimmer and Nonswimmer Children." Pediatric Exercise Science 3, no. 4 (November 1991): 342–55. http://dx.doi.org/10.1123/pes.3.4.342.

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This study was designed to determine whether there were differences in the relationships between fat-free body (FFB) to height and the subcomponents of the FFB—bone mineral content, bone width, bone mineral index, and total body water (TBW)—to height relationships among male and female age-group swimmers and nonswimmers. The 178 subjects (ages 8-16 yrs) were grouped by gender and activity level. Least-squares regression analysis was used to test the above relationships. Although there were no statistically significant differences in the FFB to height or the subcomponents of the FFB to height r

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Foo, Wee Lun, Mark A. Faghy, Andy Sparks, Josh W. Newbury, and Lewis A. Gough. "The Effects of a Nutrition Education Intervention on Sports Nutrition Knowledge during a Competitive Season in Highly Trained Adolescent Swimmers." Nutrients 13, no. 8 (August 6, 2021): 2713. http://dx.doi.org/10.3390/nu13082713.

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The aim of this study was to evaluate the effects of a seven-week nutrition education intervention on the sports nutrition knowledge (SNK) of highly trained UK adolescent swimmers. Fifteen national and international adolescent swimmers (males = 5; females = 10, 15.5 ± 1.1 years, 170.2 ± 7.5 cm, 60.3 ± 5.7 kg) participated in the study during seven consecutive weeks of the competitive swimming season. The participants received 30 min of nutrition education once per week in a classroom-based setting after they had completed their regular swim training. An undergraduate sports nutrition student d

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Tătulea-Codrean, Maria, and Eric Lauga. "Artificial chemotaxis of phoretic swimmers: instantaneous and long-time behaviour." Journal of Fluid Mechanics 856 (October 12, 2018): 921–57. http://dx.doi.org/10.1017/jfm.2018.718.

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Phoretic swimmers are a class of artificial active particles that has received significant attention in recent years. By making use of self-generated gradients (e.g. in temperature, electric potential or some chemical product) phoretic swimmers are capable of self-propulsion without the complications of mobile body parts or a controlled external field. Focusing on diffusiophoresis, we quantify in this paper the mechanisms through which phoretic particles may achieve chemotaxis, both at the individual and the non-interacting population level. We first derive a fully analytical law for the insta

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Mitchell, Lachlan J. G., Ben Rattray, Paul Wu, Philo U. Saunders, and David B. Pyne. "Responsiveness and Seasonal Variation of a 12 × 25-m Swimming Test." International Journal of Sports Physiology and Performance 14, no. 7 (August 1, 2019): 966–71. http://dx.doi.org/10.1123/ijspp.2018-0745.

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Purpose: Critical speed (CS) and supra-CS distance capacity (D′) are useful metrics for monitoring changes in swimmers’ physiological and performance capacities. However, the utility of these metrics across a season has not been systematically evaluated in high-level swimmers. Methods: A total of 27 swimmers (mean [SD]: 18 females, age = 19.1 [2.9] y, and 9 males, age = 19.5 [1.9] y) completed the 12 × 25-m swimming test multiple times (4 [3] tests/swimmer) across a 2-y period. Season-best times in all distances for the test stroke were sourced from publicly available databases. Swimmers’ dist

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Zarrouf, L. R. "0991 The Effect Of Extending Total Sleep Time And Weighted Blankets On Teenage Swimmers Performance." Sleep 43, Supplement_1 (April 2020): A376—A377. http://dx.doi.org/10.1093/sleep/zsaa056.987.

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Abstract Introduction Effectiveness of sleep extension on performance and cognition in adult athletes has been studied extensively. Effectiveness of weighted blankets on sleep extension in children has been studied with mixed results. The effect of sleep quantity on teen competitive swimmers has not been evaluated extensively. This study investigated the effects of sleep extension and weighted blankets on performance, as well as daytime sleepiness in competitive teen swimmers. The principal investigator is a high school student and a teen-swimmer herself. Methods Study Design: Using an open la

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Jeznach, Cole, and Sarah D. Olson. "Dynamics of Swimmers in Fluids with Resistance." Fluids 5, no. 1 (January 19, 2020): 14. http://dx.doi.org/10.3390/fluids5010014.

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Micro-swimmers such as spermatozoa are able to efficiently navigate through viscous fluids that contain a sparse network of fibers or other macromolecules. We utilize the Brinkman equation to capture the fluid dynamics of sparse and stationary obstacles that are represented via a single resistance parameter. The method of regularized Brinkmanlets is utilized to solve for the fluid flow and motion of the swimmer in 2-dimensions when assuming the flagellum (tail) propagates a curvature wave. Extending previous studies, we investigate the dynamics of swimming when varying the resistance parameter

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Ferraz, Ricardo, Luis Branquinho, Renata Loupo, Henrique Neiva, and Daniel Marinho. "The relationship between anthropometric characteristics and sports performance in national-level young swimmers." European Journal of Human Movement 45 (2020): 12–25. http://dx.doi.org/10.21134/eurjhm.2020.45.2.

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The main aim of this study was to verify associations between the anthropometric characteristics of young swimmers of different genders and different competitive levels with sports performance in 50m and 400m freestyle races at different levels (U-13 - Swimmers A and U-12 - Swimmers B). In addition, it was also intended to investigate the magnitude of the correlations between some specific variables (i.e., height, weight and wingspan) and the swimming performance. All participants were analyzed, regarding their anthropometric characteristics and their performance in the 50m and 400m freestyle

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Harariet, Fadila, Darmiah Darmiah, and Imam Santoso. "Hubungan Jumlah Perenang dengan Sisa Klor di Kolam Renang Antasari Banjarbaru Tahun 2016." JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan 14, no. 1 (January 2, 2017): 375. http://dx.doi.org/10.31964/jkl.v14i1.51.

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Abstract: The relationship of total swimmers with residual chlorine in the swimming pool. The swimming pool as a means of public that usually visited by the people can potentially become vehicles for spreading germs through water contaminated media pool so that sanitation should always be considered. This study aims to determine the number of swimmers in the Swimming Pool Antasari Banjarbaru, determine residual chlorine in Swimming Pool. This type of research was analytic research with cross sectional approach. The population is all water swimming pool which used by swimmers and all swimmers i

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Pelayo, Patrick, Michel Sidney, Tarik Kherif, Didier Chollet, and Claire Tourny. "Stroking Characteristics in Freestyle Swimming and Relationships with Anthropometric Characteristics." Journal of Applied Biomechanics 12, no. 2 (May 1996): 197–206. http://dx.doi.org/10.1123/jab.12.2.197.

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The purpose of this study was to determine the relationships between velocity, stroke length, and stroke rate in freestyle competitive events in order to compare male and female swimmers' results and assess their relationships with anthropometric characteristics. Three hundred three male and 325 female swimmers of national and international levels were tested during competition. Solutions adopted in each freestyle event had specific characteristics affecting the stroke rate/stroke length ratio according to distance of the race. Differences in velocity between men and women primarily resulted f

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