Effect of increasing energy cost on arm coordination in elite sprint swimmers

Komar, John; Leprêtre, Pierre-Marie; Alberty, Morgan; Vantorre, J.; Fernandes, Ricardo J.; Hellard, Philippe; Chollet, Didier; Seifert, Ludovic

doi:10.1016/j.humov.2011.07.011

Cited by 29 publications

(21 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding the second aim of the current study, the additional turning time observed in the snorkel condition vs. the conventional tumble was lower than the values previously presented in empirical studies (between 1.17 and 1.60 s [3,17,26]), which may indicate that the new AquaTrainer ® ergonomic design facilitates performing the open turn technique. It should be taken into account that in the current study, the open turn itself was approx.10 % slower than tumble turn, leading to the assumption that only the remaining approx.…”

Section: Discussion ▼contrasting

confidence: 60%

See 1 more Smart Citation

AquaTrainer® Snorkel does not Increase Hydrodynamic Drag but Influences Turning Time

et al. 2015

View full text Add to dashboard Cite

Our purpose was to verify if the use of the new AquaTrainer(®) respiratory snorkel lead to an increase of front crawl hydrodynamic drag and whether the constraint of using an adapted turning technique influences its corresponding turning time. 12 swimmers performed 2 (without and with snorkel) 12×25 front crawl repetitions from low to maximal velocity on the measuring active drag system. Complementarily, 3 swimming turns were compared: open turn with snorkel, tumble turn and open turn without snorkel. Drag values were similar without vs. with snorkel at 0.9, 1.1, 1.3, 1.5 and 1.7 m.s(-1) velocities: 15.84 ±5.32 vs. 16.18±4.81, 25.60±6.69 vs. 26.03±6.17, 38.37±8.04 vs. 38.88±7.56, 54.64±10.06 vs. 55.08±9.55, 74.77±14.09 vs. 74.92±13.14 N, (respectively, p≥0.05), and high agreement between conditions was observed (p<0.01). Front crawl swimming with snorkel using the open turn implied an increase in turning time of 14.2 and 5.1% than the tumble turn and open turn without the apparatus (p<0.01). AquaTrainer(®) snorkel does not lead to an increase in active drag during front crawl performed at a large range of velocities and, consequently, the metabolic energy necessary to overcome total drag will not be affected. However, turning with it requires an additional time that should be taken into account in scientific research and training conditions.

show abstract

Section: Discussion ▼contrasting

confidence: 60%

“…This will probably increase the duration of turning time during pool swimming and could affect the energetics of swimming. However, although empirical evidence has demonstrated that using a snorkel has an effect on turning times [3,17,26], no study has yet quantified this.…”

Section: Introduction ▼mentioning

confidence: 99%

AquaTrainer® Snorkel does not Increase Hydrodynamic Drag but Influences Turning Time

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Young swimmers’ training and competition should be monitored on a regular basis in order to design appropriate training sets and enhance performance (Marinho et al, 2011) as currently occurs in adult/elite counterparts (Komar et al, 2012). …”

Section: Introductionmentioning

confidence: 99%

The Influence of Anthropometric, Kinematic and Energetic Variables and Gender on Swimming Performance in Youth Athletes

Morais¹,

Garrido²,

Marques³

et al. 2013

Journal of Human Kinetics

View full text Add to dashboard Cite

The aim of this study was to assess the: (i) gender; (ii) performance and; (iii) gender versus performance interactions in young swimmers’ anthropometric, kinematic and energetic variables. One hundred and thirty six young swimmers (62 boys: 12.76 ± 0.72 years old at Tanner stages 1–2 by self-evaluation; and 64 girls: 11.89 ± 0.93 years old at Tanner stages 1–2 by self-evaluation) were evaluated. Performance, anthropometrics, kinematics and energetic variables were selected. There was a non-significant gender effect on performance, body mass, height, arm span, trunk transverse surface area, stroke length, speed fluctuation, swimming velocity, propulsive efficiency, stroke index and critical velocity. A significant gender effect was found for foot surface area, hand surface area and stroke frequency. A significant sports level effect was verified for all variables, except for stroke frequency, speed fluctuation and propulsive efficiency. Overall, swimmers in quartile 1 (the ones with highest sports level) had higher anthropometric dimensions, better stroke mechanics and energetics. These traits decrease consistently throughout following quartiles up to the fourth one (i.e. swimmers with the lowest sports level). There was a non-significant interaction between gender and sports level for all variables. Our main conclusions were as follows: (i) there are non-significant differences in performance, anthropometrics, kinematics and energetics between boys and girls; (ii) swimmers with best performance are taller, have higher surface areas and better stroke mechanics; (iii) there are non-significant interactions between sports level and gender for anthropometrics, kinematics and energetics.

show abstract

“…In swimming practice, video recordings are used in a variety of ways. They are used for race analysis (software: SwimWatch, SwimOptimum), qualitative technique analysis and quantitative 2D or 3D analysis of kinematic parameters (software: Qualisis, Simi [10][11][12][13][14][15][16][17][18]) of strokes, starts and turns [19]. The use of markers (on body landmarks) is a useful addition to video analysis to obtain quantitative information.…”

Section: Introductionmentioning

confidence: 99%

Automated LED tracking to measure instantaneous velocities in swimming

et al. 2018

View full text Add to dashboard Cite

In this paper a video-based method to automatically track instantaneous velocities of a swimmer is presented. Single cameras were used to follow a marker (LED) attached to the body. The method is inspired by particle tracking techniques, traditionally used in the field of fluid dynamics, to measure local velocities of a fluid flow. During the validation experiment, a white LED was attached to the hip of a swimmer together with a speedometer. A swimmer performed four different stroke types. The velocity profiles using LED tracking were captured and showed less noise than the speedometer measurements. Only at times when the marker disappeared above the water surface due to body role in front crawl and backstroke swimming did the LED tracking fail to capture the athlete's motion. The algorithm was tested in a 2D case with a single LED to illustrate the proof of principle, but should be suitable for implementation in a 3D analysis or multiple LED analysis.

show abstract

Effect of increasing energy cost on arm coordination in elite sprint swimmers

Cited by 29 publications

References 31 publications

AquaTrainer® Snorkel does not Increase Hydrodynamic Drag but Influences Turning Time

AquaTrainer® Snorkel does not Increase Hydrodynamic Drag but Influences Turning Time

The Influence of Anthropometric, Kinematic and Energetic Variables and Gender on Swimming Performance in Youth Athletes

Automated LED tracking to measure instantaneous velocities in swimming

Contact Info

Product

Resources

About