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SELECTION IN SWIMMING TRAINING – THEORETICAL STUDY

100%
Eider P.
Central European Journal of Sport Sciences and Medicine
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2014
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vol. 5
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issue 1
65-75
EN
The aim of this research study is to summarize the notion of preference and selection, which are considered to be the key element of sports training, whatever the discipline. This review provides a theoretical study on the subject. The introduction section deals with the abovementioned terminology, whereas the main paragraph predominantly discusses the process of preference and selection in swimming. Pre-school period (6-7 years of age) is the most significant for swimming selection. Such selection should be led by adequately qualified trainers with long-standing experience in professional training of young swimmers. Young swimming candidates should be characterized by higher-level motor skills, which in turn affect the time/efficiency of acquiring new swimming techniques and sport level. In selection process, it is advised/important to utilize tests which predominantly determine the level of specific motor skills such as: speed, strength, agility, motor coordination, suppleness, and so-called 'water feeling'. The above mentioned motor skills play an important role in sport training and sport performance. During selection process, sports team trainers should pay special attention to child's body posture and its length parameters, specifically body's height, length of upper and lower extremities, length of hands and feet, width parameters of the shoulders and chest. First Grade school swimming classes enrollment is also a crucial factor in identifying sport talents. The selection process should be transparent, have clear health, somatic, as well as motoric requirements, which then affect the pace and effectiveness of acquiring swimming skills and sport level.
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How Informative are the Vertical Buoyancy and the Prone Gliding Tests to Assess Young Swimmers' Hydrostatic and Hydrodynamic Profiles?

100%
Barbosa T., Costa M., Morais J., Moreira M., Silva A., Marinho D.
Journal of Human Kinetics
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2012
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vol. 32
21-32
EN
The aim of this research was to develop a path-flow analysis model to highlight the relationships between buoyancy and prone gliding tests and some selected anthropometrical and biomechanical variables. Thirty-eight young male swimmers (12.97 ± 1.05 years old) with several competitive levels were evaluated. It were assessed the body mass, height, fat mass, body surface area, vertical buoyancy, prone gliding after wall push-off, stroke length, stroke frequency and velocity after a maximal 25 [m] swim. The confirmatory model included the body mass, height, fat mass, prone gliding test, stroke length, stroke frequency and velocity. All theoretical paths were verified except for the vertical buoyancy test that did not present any relationship with anthropometrical and biomechanical variables nor with the prone gliding test. The good-of-fit from the confirmatory path-flow model, assessed with the standardized root mean square residuals (SRMR), is considered as being close to the cut-off value, but even so not suitable of the theory (SRMR = 0.11). As a conclusion, vertical buoyancy and prone gliding tests are not the best techniques to assess the swimmer's hydrostatic and hydrodynamic profile, respectively.
3
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Psychophysical motivational effects of music on competitive swimming

100%
Szczepan S., Kulmatycki L.
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EN
Background: The aim of the study was to assess changes in motivation levels in the subjects who were provided with motivational music (independent variable). The additional aim was to establish differences between two study groups in terms of swimming effectiveness. Material/Methods: The employed research method relied on a laboratory experiment. The study included 8 subjects involved in swimming training. They were divided into two groups - control (C) and experimental (E) ones. The study consisted of three trials during which the subjects swam a distance of 50m front crawl with maximum velocity. In the first trial neither of the groups had an independent variable. In trials two and three group C swam the distance listening to white noise. Group E received motivational music of choice (independent variable). Before and after the trials the subjects’ motivation was assessed by means of the MOTO scale. Results: The motivation level assessed by means of the MOTO scale revealed no statistically significant differences in the groups. The Mann-Whitney U Test showed no statistically significant differences between the study groups in terms of their times over 50 m. Conclusions: Motivational music which the swimmers received when swimming had no impact on an increased level of the swimmers’ motivation and swimming effectiveness.
4
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Wave Characteristics in Breaststroke Technique with and Without Snorkel Use

75%
Conceição A., Silva A. J., Boaventura J., Marinho D. A., Louro H.
Journal of Human Kinetics
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2013
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vol. 39
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issue 1
185-194
EN
The purpose of this paper was to examine the characteristics of waves generated when swimming with and without the use of Aquatrainer® snorkels. Eight male swimmers performed two maximal bouts of 25 m breaststroke, first without the use of a snorkel (normal condition) and then using a snorkel (snorkel condition). The body landmarks, centre of the mass velocity, stroke rate, stroke length, stroke index, and Strouhal number (St) were quantified. Fourier analysis was conducted to determine the frequency, amplitude, and phase characteristics of the vertical undulations. We also determined the undulation period, the first and second harmonic wave percentage, and the contribution of these components to the power of each of the wave signals. The first wave harmonics had a frequency of 0.76 Hz (normal condition) and 0.78 Hz (snorkel condition), and the second wave harmonics had a frequency of 1.52 Hz (normal condition) and 1.56 Hz (snorkel condition). Under the normal conditions, the wave amplitude was higher on the vertex (0.72 m) and cervical (0.32 m) than that produced under snorkel conditions (0.71 m and 0.28 m, respectively). The lowest values were found in the hip (0.03 m in normal conditions, and 0.02 m in snorkel conditions) and in the trunk (0.06 m in normal conditions, and 0.04 m in snorkel conditions). It can be concluded that snorkel use seems to lead to slight changes in the biomechanical pattern in swimming velocity, as well as several stroke mechanical variables.
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