COMPARISON OF KINEMATIC AND DYNAMIC INDICATORS OF FRONT CRAWL TECHNIQUE IN SWIMMERS AGED 12-13 YEARS WHO PREFER UNILATERAL AND BILATERAL BREATHING OPTIONS

Purpose of the research was to compare a number of kinematic and dynamic indicators of front crawl swimming technique during a 30-second tethered test in swimmers aged 12-13 years who prefer bilateral and unilateral breathing options.

Methods and organization of research. 14 male swimmers were studied, whose average age and training experience were 13.2 ± 0.4 and 6.5 ± 0.8 years, respectively. Two groups of swimmers were compared depending on the preference for breathing options when swimming front crawl: "group 1" – unilateral breathing (n=9), "group 2" – bilateral breathing (n=5). Kinematic indicators were obtained using underwater photography, dynamic ones using a dynamometer.

Research results and discussion. Most indicators of swimming technique did not differ statistically significant in both groups (except for the time when the hands were above the water, p<0.05). With the onset of fatigue, the number of strokes decreased, and the average stroke time increased in both groups. Stroke length increased in "group 2", and in "group 1", on the contrary, decreased. The indicators of traction force and coefficient of strength endurance did not differ significantly (p>0,05).

Conclusion. During the 30-second tether test, the kinematic and dynamic parameters of front crawl swimming techniques in the groups with bilateral and unilateral breathing options did not differ statistically significant (except for the phase of carrying hands over water). The study did not reveal the advantages of swimming techniques using unilateral breathing over bilateral breathing in the studied age range.

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