Relationships between coordination, active drag and propelling efficiency in crawl

Seifert, Ludovic; Schnitzler, Christophe; Bideault, Gautier; Alberty, Morgan; Chollet, Didier; Toussaint, H.M.

doi:10.1016/j.humov.2014.10.009

Cited by 25 publications

(20 citation statements)

References 20 publications

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“…Pe values obtained in our study were similar to other authors (Seifert et al, 2015;Hubb M Toussaint et al, 1988;H. M. Toussaint et al, 1989;Zamparo et al, 2005).…”

Section: Discussionsupporting

confidence: 93%

Acute effect of wearing wetsuit on 400m performance in a swimming pool and in a swimming flume

Párraga¹

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The purpose of the present study was to determine the physiological and technical differences between the use of wetsuit compared with the swimsuit in two specific environments the 25m swimming pool and a swimming flume. A total of 33 triathletes and open water swimmers (age 26.46±11.72 years) participated in the study. The trials were made with and without full body wetsuit randomly and counter balanced for each experimental condition. Two 400m trials were randomly performed in a 25m pool, one wearing wetsuit and another wearing training swimsuit. Two mores trials performed in the swimming flume with the same duration than the swimming pool trial at the same mean water velocity. The analysis carried out was the repeated measurement ANOVA to determine the differences between four experimental conditions. The results revealed the four experimental conditions had a main effect on velocity (F 3,96 = 114.02 P<0.

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“…Pe values obtained in our study were similar to other authors (Seifert et al, 2015;Hubb M Toussaint et al, 1988;H. M. Toussaint et al, 1989;Zamparo et al, 2005).…”

Section: Discussionsupporting

confidence: 93%

Acute effect of wearing wetsuit on 400m performance in a swimming pool and in a swimming flume

Párraga¹

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“…[2][3][4][5] Coordination between propulsive actions of the left and right arms is highly correlated to stroke rate, swimming speed, speed fluctuations, and power output. 5,6 Three coordination modes are usually observed in front crawl swimming and quantified by an index of coordination (IdC 7 ). The catch-up mode corresponds to a lag time between the propulsive phases of the two arms.…”

Section: Introductionmentioning

confidence: 99%

Influence of stroke rate on coordination and sprint performance in elite male and female swimmers

Escobar

Hellard

Seifert

2020

Scandinavian Med Sci Sports

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This study investigated the effects of gender and the manipulation of the preferred stroke rate on swimming performance and arm coordination in elite front crawl swimmers. Nineteen swimmers performed a dual task, that is, imposed stroke rate and maximal speed. They swam nine 25-m trials at maximal speed twice: one trial at the preferential stroke rate, one trial at maximal stroke rate and seven trials at stroke rates between 41 and 59 cycles/min imposed by an Aquapacer. Stroke rate, arm stroke phases, and arm coordination were computed from an inertial measurement unit on each forearm and one on the sacrum. Time on the 25-m was recorded to assess swimming speed. Results indicated that the error between the imposed and performed stroke rates was lowest at the preferred stroke rate for women. An increase in stroke rate led to an increase in swimming speed and the index of coordination, but these changes could be influenced by the preferred stroke rate. Individual analysis revealed that some swimmers exhibited higher flexibility (larger range of stroke rate) around their preferred stroke rate. This stroke rate flexibility appeared more functional in swimmers who reached higher speeds when swimming at the maximal stroke rate than at the preferred stroke rate.

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“…As swimming is performed in liquid environment, changes in swimming speed imply changes in the restrictions imposed by the body, since the swimming speed determines the intensity and the respective physiological adaptations 22 , by the environment, the hydrodynamic drag is proportional to the square of the displacement speed 23 , and by the task, because swimming short or long distances at high or low swimming speeds implies adjustments to the restrictions imposed by both the body and the environment. The results presented by Seifert et al 24 suggest through a mathematical modeling, that IdC plays an important role in solving the problem of generating more propulsion to swim faster. This modeling indicates that the constraints imposed by the environment are those with the greatest influence on motor organization in swimming, i.e., swimmers modify the stroke coordination from a capture model to an overlapping model, to overcome the hydrodynamic drag when swimming at higher speeds.…”

Section: Discussionmentioning

confidence: 99%

“…The main limitation of this study was not assessing the variation of the intracyclic speed and propulsive efficiency 24 , which are parameters that greatly contribute to the understanding of the swimming performance. However, the identification of T prop in maximum effort of 200 m front crawl, whose behavior seems to reflect the efforts of swimmers to maintaining high and constant speed, seems to be pioneer in studies in this area.…”

Section: Discussionmentioning

confidence: 99%

Desempenho em 200 m nado crawl: índice de coordenação, tempo propulsivo e cinemática de nado

Franken

Ludwig

Cardoso

et al. 2016

Rev. Bras. Cineantropom. Desempenho Hum.

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-The aim of this study was to compare coordination index, propulsive time, duration of stroke phases and kinematic parameters over 200 m front crawl. Variables were compared among four sections of 50 m (T1 to T4) in fifteen competitive swimmers (age: 21.1 ± 7.1 years; height: 180.1 ± 6.1 cm; height: 187.3 ± 8, 1 cm; body mass: 72.1 ± 10.1 kg; better performance in the race: 77.5 ± 4.7% of the world record). Data were obtained with two video cameras (60 Hz -coupled to a cart on rails on the side of the pool) for simultaneous images of the swimmer's sagittal plan: below the water line and above the water line. Mean stroke rate stroke length, assumed as the mean distance traveled per cycle, and mean swimming speed were obtained with manual timing. Over the 200 m, the coordination index remained unchanged (p >0.05), but there was an increase in the frequency of cycles (p <0.05) and reduction of distance traveled per cycle (p <0.05). Between T1 and T2, there was an increase in the propulsive time (p <0.05) and between T1 and T4, there was an increase in the length of the pull phase (p <0.05). The swimming speed decreased only between T1 and T2 (p <0.05). Over 200 m front crawl, well-trained swimmers increment propulsive time and pull phase duration and frequency of stroke cycles, and such changes may be due to the speed maintenance attempt over the 200 m.Key words: Efficiency; Kinematics; Swimming. (idade: 21,1 ± 7,1 anos; estatura: 180,1 ± 6,1 cm; envergadura: 187,3 ± 8,1 cm; massa corporal: 72,1 ± 10,1 kg; melhor desempenho na prova: 77,5 ± 4,7% do recorde mundial Resumo -O objetivo deste estudo foi comparar índice de coordenação, tempo propulsivo, duração das fases da braçada e parâmetros cinemáticos ao longo de 200 m nado crawl. Variáveis foram comparadas entre os quatro trechos de 50 m (T1 a T4) em quinze nadadores competitivos

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Relationships between coordination, active drag and propelling efficiency in crawl

Cited by 25 publications

References 20 publications

Acute effect of wearing wetsuit on 400m performance in a swimming pool and in a swimming flume

Acute effect of wearing wetsuit on 400m performance in a swimming pool and in a swimming flume

Influence of stroke rate on coordination and sprint performance in elite male and female swimmers

Desempenho em 200 m nado crawl: índice de coordenação, tempo propulsivo e cinemática de nado

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