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Journal articles on the topic 'Dolphin swimmer'

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1

Houel, Nicolas, Marc Elipot, Frédéric André, and Philippe Hellard. "Influence of Angles of Attack, Frequency and Kick Amplitude on Swimmer’s Horizontal Velocity During Underwater Phase of a Grab Start." Journal of Applied Biomechanics 29, no. 1 (2013): 49–54. http://dx.doi.org/10.1123/jab.29.1.49.

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The underwater phase of starts represents an important part of the performance in sprint swimming’s events. Kinematics variables that swimmers have to take into account to improve their underwater phase of starts are unknown. The aim of this study was to determine the kinematics variables that improve performance during the underwater phase of grab starts. A three-dimensional analysis of the underwater phase of ten swimmers of national level was conducted. Stepwise multiple linear regressions identified the main kinematics variables that influence the horizontal velocity of the swimmer each 0.
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2

Courbis, Sarah. "Effect of Spinner Dolphin Presence on Level of Swimmer and Vessel Activity in Hawai'ian Bays." Tourism in Marine Environments 4, no. 1 (2007): 1–14. http://dx.doi.org/10.3727/154427307784835697.

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3

Delfour, Fabienne. "Hawaiian spinner dolphins and the growing dolphin watching activity in Oahu." Journal of the Marine Biological Association of the United Kingdom 87, no. 1 (2007): 109–12. http://dx.doi.org/10.1017/s0025315407054148.

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Hawaiian spinner dolphins (Stenella longirostris) feed offshore at night on mesopelagic prey and move to protected shallow waters in early morning to rest. We hypothesized that this behaviour would make them particularly sensitive to anthropogenic factors in these rest areas and would affect their overall behaviour and their population frequency. To test our hypothesis we collected data in a known rest area along the north-west coast of the island of Oahu during August of 2001, 2002 and 2003. Using land- and water-based surveys, we evaluated dolphin group size, counted boats, kayaks and swimme
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4

Fumagalli, Maddalena, Amina Cesario, Marina Costa, John Harraway, Giuseppe Notarbartolo di Sciara, and Elisabeth Slooten. "Behavioural responses of spinner dolphins to human interactions." Royal Society Open Science 5, no. 4 (2018): 172044. http://dx.doi.org/10.1098/rsos.172044.

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There is increasing evidence that whale and dolphin watching activities have detrimental effects on targeted cetacean populations. In Egypt, spinner dolphins regularly occur in the resting areas of Samadai, Satayah and Qubbat'Isa reefs. In-water human interactions with dolphins are regulated with a time-area closure system at Samadai, unregulated at Satayah and non-existent at Qubbat'Isa. This provided an ideal experimental setting to advance our understanding of the effects of tourism on a species highly sensitive to disturbances. Our study confirmed that the intensity and duration of interac
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5

Scheer, Michael. "Review of self-initiated behaviors of free-ranging cetaceans directed towards human swimmers and waders during open water encounters." Interaction Studies 11, no. 3 (2010): 442–66. http://dx.doi.org/10.1075/is.11.3.07sch.

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Open water encounters of swimming and wading humans with wild cetaceans have increased worldwide. Behaviors being self-initiated by cetaceans during encounters and addressed towards humans still have received little study and their structure and function mostly remain unclear. This study reviews the scientific literature describing such behaviors. Unhabituated, habituated, lone and sociable and food-provisioned cetaceans from 10 odontocete and one mysticeti species were reported to show altogether 53 different behaviors which were affi liative (33 behaviors), aggressive/threatening (18) and se
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6

Brensing, Karsten, Katrin Linke, Melanie Busch, Ina Matthes, and Sylvia Eke van der Woude. "Impact of different groups of swimmers on dolphins in swim-with-the-dolphin programs in two settings." Anthrozoös 18, no. 4 (2005): 409–29. http://dx.doi.org/10.2752/089279305785593956.

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7

Collard, L., A. Oboeuf, and S. Ahmaidi. "Motor Skills Transfer from Gymnastics to Swimming." Perceptual and Motor Skills 105, no. 1 (2007): 15–26. http://dx.doi.org/10.2466/pms.105.1.15-26.

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99 adult specialists in combat sports ( n = 21), team sports ( n = 37), gymnastics ( n = 22), and swimming ( n = 19) ( M age = 20 yr., SD = 2; 64 young men, 35 young women) performed three 25-m swimming tasks whilst “blindfolded” by opaque goggles: front crawl in a straight line, dolphin-kicking on the back, and dolphin-kicking on the front. Even though the gymnasts (like the swimmers) were at ease in all 3 situations, the motor skills of the “motor interaction” specialists (team sports, combat sports) put the latter at a disadvantage. The similarities between the gymnasts' and swimmers' behav
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8

Constantine, Rochelle. "INCREASED AVOIDANCE OF SWIMMERS BY WILD BOTTLENOSE DOLPHINS (TURSIOPS TRUNCATUS) DUE TO LONG-TERM EXPOSURE TO SWIM-WITH-DOLPHIN TOURISM." Marine Mammal Science 17, no. 4 (2001): 689–702. http://dx.doi.org/10.1111/j.1748-7692.2001.tb01293.x.

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9

Wainwright, Dylan K., Frank E. Fish, Sam Ingersoll, et al. "How smooth is a dolphin? The ridged skin of odontocetes." Biology Letters 15, no. 7 (2019): 20190103. http://dx.doi.org/10.1098/rsbl.2019.0103.

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Dolphin skin has long been an inspiration for research on drag reduction mechanisms due to the presence of skin ridges that could reduce fluid resistance. We gathered in vivo three-dimensional surface data on the skin from five species of odontocetes to quantitatively examine skin texture, including the presence and size of ridges. We used these data to calculate k + values, which relate surface geometry to changes in boundary layer flow. Our results showed that while ridge size differs among species, odontocete skin was surprisingly smooth compared to the skin of other swimmers (average rough
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10

Kitamura, Gakuto, Hiroshige Tateuchi, and Noriaki Ichihashi. "Greater Lumbar Extension During Dolphin Kick and Psoas Major Tightness in Swimmers With Low Back Pain." Journal of Sport Rehabilitation 29, no. 6 (2020): 716–22. http://dx.doi.org/10.1123/jsr.2018-0262.

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Context:In competitive swimming, many swimmers experience low back pain (LBP). Lumbar hyperextension may cause LBP, and tight hip-flexor muscle may cause lumbar extension during swimming.Objective:The purpose of this study was to clarify the features of the elastic moduli of the muscles and the lumbar extension when swimmers with LBP perform a dolphin kick (DK).Design:Cross-sectional study.Setting:Single center.Other Participants:Eleven male college swimmers were enrolled as the LBP group (who have LBP when swimming and during a lumbar extension), and 21 male college swimmers were recruited as
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11

Wada, T., N. Yamamoto, H. Jigami, Y. Shimoyama, M. Wada, and T. Matsumoto. "Biomechanical analysis of the gliding and dolphin kick movement in competitive swimmers." Journal of Science and Medicine in Sport 16 (December 2013): e73. http://dx.doi.org/10.1016/j.jsams.2013.10.174.

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12

Willems, Tine M., Justien A. M. Cornelis, Lien E. P. De Deurwaerder, Filip Roelandt, and Sophie De Mits. "The effect of ankle muscle strength and flexibility on dolphin kick performance in competitive swimmers." Human Movement Science 36 (August 2014): 167–76. http://dx.doi.org/10.1016/j.humov.2014.05.004.

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13

Bejder, Lars, Stephen M. Dawson, and John A. Harraway. "RESPONSES BY HECTOR'S DOLPHINS TO BOATS AND SWIMMERS IN PORPOISE BAY, NEW ZEALAND." Marine Mammal Science 15, no. 3 (1999): 738–50. http://dx.doi.org/10.1111/j.1748-7692.1999.tb00840.x.

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14

Wada, Tadashi, Noriyuki Yamamoto, Yoshimitsu Shimoyama, et al. "The Relationship Between Dolphin Kick Movement And Underwater EMG Of Lower Leg Muscles In Competitive Swimmers." Medicine & Science in Sports & Exercise 48 (May 2016): 441. http://dx.doi.org/10.1249/01.mss.0000486327.85430.18.

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15

Mohamed, Walid. "The impact of using TRX training on some of the physical and digital variables of dolphin swimmers." Assiut Journal of Sport Science and Arts 317, no. 3 (2017): 41–55. http://dx.doi.org/10.21608/ajssa.2017.70422.

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16

Mohamed Mohamed, Walid. "The impact of using TRX training on some of the physical and digital variables of dolphin swimmers." Assiut Journal of Sport Science and Arts 2017, no. 3 (2017): 41–55. http://dx.doi.org/10.21608/ajssa.2017.138701.

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17

Shimojo, Hirofumi, Yasuo Sengoku, Shozo Tsubakimoto, and Hideki Takagi. "Kinematics and kinesthesia of competitive swimmers during dolphin kick swimming in an indoor pool and a water flume." Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences) 59, no. 1 (2014): 237–49. http://dx.doi.org/10.5432/jjpehss.13103.

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18

Titiz, Mesut İzzet. "Respiratory physiology during swimming: Better exhale and inhaleYüzmede solunum fizyolojisi: Etkili nefes verme ve alma." Journal of Human Sciences 15, no. 3 (2018): 1739. http://dx.doi.org/10.14687/jhs.v15i3.5263.

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Water is not a physiologically friendly environment for humans. Due to limited movement and unnatural adjustment to breathing patterns, we feel stressed, nervous, anxious, and physically tenser. These psychological conditions are detrimental to the performance for beginner swimmers. As with most sports, the physiologically optimal state during non-sprinting performance in swimming is aerobic respiration. As performance intensity increases, effectively increased rate of respiration must follow. The diaphragm is the primary respiratory muscle. The diaphragm and auxiliary respiratory muscles work
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19

Kobayashi, Keisuke, Hirofumi Shimojo, Hideki Takagi, Shozo Tsubakimoto, and Yasuo Sengoku. "Pattern of muscular activity in the trunk, thigh and lower leg during the underwater dolphin kick in elite female competitive swimmers." Taiikugaku kenkyu (Japan Journal of Physical Education, Health and Sport Sciences) 61, no. 1 (2016): 185–95. http://dx.doi.org/10.5432/jjpehss.15111.

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20

Bazúa Durán, Carmen, and Nina V. Luna Valiente. "Effect of vessels and swimmers on the behavior of spinner dolphins (Stenella longirostris) off the Big Island of Hawai'i." Journal of the Acoustical Society of America 123, no. 5 (2008): 2984. http://dx.doi.org/10.1121/1.2932508.

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21

Courbis, Sarah, and Gregory Timmel. "Effects of vessels and swimmers on behavior of Hawaiian spinner dolphins (Stenella longirostris) in Kealake‘akua, Honaunau, and Kauhako bays, Hawai‘i." Marine Mammal Science 25, no. 2 (2009): 430–40. http://dx.doi.org/10.1111/j.1748-7692.2008.00254.x.

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22

Danil, Kerri, Daniela Maldini, and Ken Marten. "Patterns of Use of Maku'a Beach, O'ahu, Hawai'i, by Spinner Dolphins (Stenella longirostris) and Potential Effects of Swimmers on Their Behavior." Aquatic Mammals 31, no. 4 (2005): 403–12. http://dx.doi.org/10.1578/am.31.4.2005.403.

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23

Krasilnikov, V., O. Vedernikova, S. Komelkov, A. Shevtsov, and N. Kleshchenkova. "STUDIES OF FEATURES OF ARM STROKE EXTERNAL DYNAMIC CHARACTERISTICS IN DOLPHIN-STYLE SWIMMERS WITH A SUBSEQUENT CORRECTION OF THE POSITION OF BODY SEGMENTS IN THE RANGE OF MODEL PARAMETERS." Human. Sport. Medicine 18, no. 4 (2018): 80–87. http://dx.doi.org/10.14529/hsm180412.

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24

Reid, DD, and M. Krogh. "Assessment of catches from Protective Shark meshing off NSW beaches between 1950 and 1990." Marine and Freshwater Research 43, no. 1 (1992): 283. http://dx.doi.org/10.1071/mf9920283.

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Mesh netting of beaches along the more populous sections of the NSW coast for the protection of swimmers and surfers against shark attack has been carried out since 1937 in Sydney and since 1949 in Newcastle and Wollongong. Data for the catches of sharks by taxonomic groups are presented for the period from 1950 to 1990. Although there were large year-to-year fluctuations, neither catch nor catch per unit effort showed any discernible trend for the period up to 1972. In 1973, the catches of all taxonomic groups increased substantially following changes to the specifications of nets and their d
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25

Dibble, Dianna Samuelson, Kaitlin R. Van Alstyne, and Sam Ridgway. "Dolphins Signal Success by Producing a Victory Squeal." International Journal of Comparative Psychology 29 (2016). http://dx.doi.org/10.46867/ijcp.2016.29.00.14.

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We have long observed dolphins producing recognizable sounds—bursts of pulses with sweeping peak frequencies—at prey capture. We call this the victory squeal. When dolphins hunt fish, there are three sequential sounds: sonar clicks, terminal buzz, and the victory squeal. When dolphins find a fish with sonar clicks, but reject the fish during the terminal buzz phase, they omit or truncate the victory squeal. We also observe dolphins producing the victory squeal after a trainer’s bridge, which serves as secondary reinforcement that bridges the time gap between the dolphin’s performance and deliv
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26

Vasileios Konstantakos, Thomas Nikodelis. "Pelvis-Upper Trunk Coordination at Butterfly Stroke and Underwater Dolphin Kick: Application on an Elite Female Butterfly Swimmer." Journal of Athletic Enhancement 02, no. 05 (2013). http://dx.doi.org/10.4172/2324-9080.1000125.

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27

von Loebbecke, Alfred, Rajat Mittal, Frank Fish, and Russell Mark. "Propulsive Efficiency of the Underwater Dolphin Kick in Humans." Journal of Biomechanical Engineering 131, no. 5 (2009). http://dx.doi.org/10.1115/1.3116150.

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Three-dimensional fully unsteady computational fluid dynamic simulations of five Olympic-level swimmers performing the underwater dolphin kick are used to estimate the swimmer’s propulsive efficiencies. These estimates are compared with those of a cetacean performing the dolphin kick. The geometries of the swimmers and the cetacean are based on laser and CT scans, respectively, and the stroke kinematics is based on underwater video footage. The simulations indicate that the propulsive efficiency for human swimmers varies over a relatively wide range from about 11% to 29%. The efficiency of the
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28

Shen, Yupeng, Yanqing Fu, Yu Ge, and Yuhong Wen. "The effect of ankle flexibility on the relationship between knee isokinetic strength and the speed of underwater dolphin kicks in male competitive swimmers." Isokinetics and Exercise Science, June 11, 2021, 1–8. http://dx.doi.org/10.3233/ies-200255.

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BACKGROUND: Lower-extremity muscle strength and ankle flexibility play key roles in underwater swimming movements. OBJECTIVES: To investigate the relationship between knee isokinetic strength and the speed of underwater dolphin kicks (UDK-S) in competitive male swimmers and identify whether ankle flexibility affects the association between knee isokinetic strength and UDK-S. METHODS: Fifty-two highly trained male swimmers participated in this study. The speed at which the participants travelled 15 m performing UDKs was calculated as UDK-S. Knee flexor and extensor concentric isokinetic strengt
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29

Wądrzyk, Łukasz, Leszek Nosiadek, and Robert Staszkiewicz. "Underwater dolphin kicks of young swimmers – evaluation of effectiveness based on kinematic analysis." Human Movement 18, no. 4 (2017). http://dx.doi.org/10.1515/humo-2017-0030.

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30

Smits, Alexander J. "Undulatory and oscillatory swimming." Journal of Fluid Mechanics 874 (July 4, 2019). http://dx.doi.org/10.1017/jfm.2019.284.

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Theory and modelling remain central to improving our understanding of undulatory and oscillatory swimming. Simple models based on added mass can help to give great insight into the mechanics of undulatory swimming, as demonstrated by animals such as eels, stingrays and knifefish. To understand the swimming of oscillatory swimmers such as tuna and dolphins, models need to consider both added mass forces and circulatory forces. For all types of swimming, experiments and theory agree that the most important velocity scale is the characteristic lateral velocity of the tail motion rather than the s
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