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The examination of different tests for the evaluation of the efficiency of the eggbeater kicks.

Stirn I, Strmecki J, Strojnik V - J Hum Kinet (2014)

Bottom Line: Results showed that when performing alternate eggbeater kicks greater average forces were produced by the water polo players when compared to consecutive simultaneous eggbeater kicks.However, a short time maximal acceleration of the body in the vertical and horizontal plane was greater when the single simultaneous kick was performed.Therefore, the recommendation was to measure the average force of successive alternating eggbeater kicks, the height of the jump out of the water from the basic position and the water start and swim over a distance of 2 meters.

View Article: PubMed Central - PubMed

Affiliation: University of Ljubljana, Faculty of sport.

ABSTRACT
The eggbeater kick presents an important basic technical skill in water polo. The aim of this study was to examine some different tests in order to recommend the best ones for the evaluation of the eggbeater kick. Twenty eight young male water polo players performed one test (squat jump) on land and ten tests in water: tethered swimming with legs only, using alternating and simultaneous eggbeater kicks, jumps out of water from basic and vertical (arms vertically above the head) position, water start and swimming two meters and swimming horizontally with legs only five meters with a flying start. The differences between tests were checked by executing dependent t-tests, while Pearson's correlation coefficients were calculated to evaluate the correlation between different parameters. Results showed that when performing alternate eggbeater kicks greater average forces were produced by the water polo players when compared to consecutive simultaneous eggbeater kicks. However, a short time maximal acceleration of the body in the vertical and horizontal plane was greater when the single simultaneous kick was performed. It was determined that horizontal swimming using legs only and a squat jump were less useful for the evaluation of the eggbeater kick. Therefore, the recommendation was to measure the average force of successive alternating eggbeater kicks, the height of the jump out of the water from the basic position and the water start and swim over a distance of 2 meters.

No MeSH data available.


Related in: MedlinePlus

Force during tethered swimming: alternate (red) and simultaneous (blue) eggbeater kicks. Vertical lines mark the interval where the force was measured.
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f1-jhk-41-215: Force during tethered swimming: alternate (red) and simultaneous (blue) eggbeater kicks. Vertical lines mark the interval where the force was measured.

Mentions: Four of the tests consisted of tethered swimming with legs only. The player wore a waist belt and maintained the horizontal position in the water while holding the floating board in his arms in order to avoid arm movement (Picture 1). The inelastic cord was attached to the belt in one end and to the swimming pool edge at the other. In-between the pool edge and the cord the waterproof force sensor was connected to a custom made amplifier powered by batteries and it was mounted and connected to a notebook computer also operating on batteries. The player performed eggbeater kicks and strained the cord and the sensor. As a result of a strain the sensor voltage changed and was measured. The force sensor was calibrated using the weight of ten kilograms and this way the force was computed and expressed in Newton. The force of the pull on the cord was recorded and later analysed as shown in Figures 1 and 2.


The examination of different tests for the evaluation of the efficiency of the eggbeater kicks.

Stirn I, Strmecki J, Strojnik V - J Hum Kinet (2014)

Force during tethered swimming: alternate (red) and simultaneous (blue) eggbeater kicks. Vertical lines mark the interval where the force was measured.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4120455&req=5

f1-jhk-41-215: Force during tethered swimming: alternate (red) and simultaneous (blue) eggbeater kicks. Vertical lines mark the interval where the force was measured.
Mentions: Four of the tests consisted of tethered swimming with legs only. The player wore a waist belt and maintained the horizontal position in the water while holding the floating board in his arms in order to avoid arm movement (Picture 1). The inelastic cord was attached to the belt in one end and to the swimming pool edge at the other. In-between the pool edge and the cord the waterproof force sensor was connected to a custom made amplifier powered by batteries and it was mounted and connected to a notebook computer also operating on batteries. The player performed eggbeater kicks and strained the cord and the sensor. As a result of a strain the sensor voltage changed and was measured. The force sensor was calibrated using the weight of ten kilograms and this way the force was computed and expressed in Newton. The force of the pull on the cord was recorded and later analysed as shown in Figures 1 and 2.

Bottom Line: Results showed that when performing alternate eggbeater kicks greater average forces were produced by the water polo players when compared to consecutive simultaneous eggbeater kicks.However, a short time maximal acceleration of the body in the vertical and horizontal plane was greater when the single simultaneous kick was performed.Therefore, the recommendation was to measure the average force of successive alternating eggbeater kicks, the height of the jump out of the water from the basic position and the water start and swim over a distance of 2 meters.

View Article: PubMed Central - PubMed

Affiliation: University of Ljubljana, Faculty of sport.

ABSTRACT
The eggbeater kick presents an important basic technical skill in water polo. The aim of this study was to examine some different tests in order to recommend the best ones for the evaluation of the eggbeater kick. Twenty eight young male water polo players performed one test (squat jump) on land and ten tests in water: tethered swimming with legs only, using alternating and simultaneous eggbeater kicks, jumps out of water from basic and vertical (arms vertically above the head) position, water start and swimming two meters and swimming horizontally with legs only five meters with a flying start. The differences between tests were checked by executing dependent t-tests, while Pearson's correlation coefficients were calculated to evaluate the correlation between different parameters. Results showed that when performing alternate eggbeater kicks greater average forces were produced by the water polo players when compared to consecutive simultaneous eggbeater kicks. However, a short time maximal acceleration of the body in the vertical and horizontal plane was greater when the single simultaneous kick was performed. It was determined that horizontal swimming using legs only and a squat jump were less useful for the evaluation of the eggbeater kick. Therefore, the recommendation was to measure the average force of successive alternating eggbeater kicks, the height of the jump out of the water from the basic position and the water start and swim over a distance of 2 meters.

No MeSH data available.


Related in: MedlinePlus