Butterfly swimming technique variations during an exhaustive swim exercise

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14510%2F17%3A00100489" target="_blank" >RIV/00216224:14510/17:00100489 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Butterfly swimming technique variations during an exhaustive swim exercise

Popis výsledku v původním jazyce

Purpose: Fatigue significantly influences not only physiological parameters during swimming, but also the technique of swimming stroke. Fatigue, therefore, affects also swimmers performance. This study aims to find out to what extent fatigue influences the technical execution of the butterfly stroke with and without breathing. Method:This work is structured as a case study. The participant was one of the best Czech and European swimmers, a 50 m butterfly Czech record holder. The swimmer performed a standardized lactate test - 8 x 50 metres butterfly swim.In selected moments his heart frequency was measured using a sport tester Polar and a blood sample was taken for lactate level test using Lactate scout+ device. A speedometer “Swim-Speedo-Meter” fixed on the belt and a video record was used for the stroke technique analysis. Temporal, spatial and speed characteristics were evaluated from the acquired curve of the swimmers speed. Results: Maximum heart frequency (172 bpm) as well as blood lactate level (14.2 mmol·l-1 ) was reached after fifth 50m track. There was a huge increase in stroke frequency with increasing fatigue. This fact resulted in the decrease in stroke duration from initial 1.37 s to 1.09 s in stroke with breathing and from 1.29 s to 1.06 s in a stroke without breathing. Significant changes during the transition phase from “insweep” to “upsweep” were observed, with a huge decrease in speed. Furthermore, accumulated fatigue caused that the speed developed during “insweep” phase was smaller in the second part of lactate test compared to the previous parts. These major differences in technique negatively influence stroke effectiveness.Conclusion: The core importance lies in between relations of measured variables that show changes of butterfly stroke technique as swimmer fatigue increased. We recommend to focus on strength and dynamic preparation during training, mainly leg movement during the second kick. We also recommend regular speedometer measurements which can help control changes in technique causedby factors such as fatigue, injury, different period of training annual cycle, etc.

Název v anglickém jazyce

Butterfly swimming technique variations during an exhaustive swim exercise

Popis výsledku anglicky

Purpose: Fatigue significantly influences not only physiological parameters during swimming, but also the technique of swimming stroke. Fatigue, therefore, affects also swimmers performance. This study aims to find out to what extent fatigue influences the technical execution of the butterfly stroke with and without breathing. Method:This work is structured as a case study. The participant was one of the best Czech and European swimmers, a 50 m butterfly Czech record holder. The swimmer performed a standardized lactate test - 8 x 50 metres butterfly swim.In selected moments his heart frequency was measured using a sport tester Polar and a blood sample was taken for lactate level test using Lactate scout+ device. A speedometer “Swim-Speedo-Meter” fixed on the belt and a video record was used for the stroke technique analysis. Temporal, spatial and speed characteristics were evaluated from the acquired curve of the swimmers speed. Results: Maximum heart frequency (172 bpm) as well as blood lactate level (14.2 mmol·l-1 ) was reached after fifth 50m track. There was a huge increase in stroke frequency with increasing fatigue. This fact resulted in the decrease in stroke duration from initial 1.37 s to 1.09 s in stroke with breathing and from 1.29 s to 1.06 s in a stroke without breathing. Significant changes during the transition phase from “insweep” to “upsweep” were observed, with a huge decrease in speed. Furthermore, accumulated fatigue caused that the speed developed during “insweep” phase was smaller in the second part of lactate test compared to the previous parts. These major differences in technique negatively influence stroke effectiveness.Conclusion: The core importance lies in between relations of measured variables that show changes of butterfly stroke technique as swimmer fatigue increased. We recommend to focus on strength and dynamic preparation during training, mainly leg movement during the second kick. We also recommend regular speedometer measurements which can help control changes in technique causedby factors such as fatigue, injury, different period of training annual cycle, etc.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

30306 - Sport and fitness sciences

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů