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Advisability on the shift from standard front crawl swimming technique to the “kayaking” and “loping” variants

机译：从标准的前爬网游泳技术向“皮划艇”和“倾斜”变体转变的建议

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Purpose. The aim of this study was to analyze selected kinematics parameters of standard front crawl swimming technique and its variants, the “kayaking” and “loping”, in order to estimate the differences that can determine swimming effectiveness and efficiency Methods. Eighteen swimmers, divided equally into three groups, took part in the research. The first group was composed of individuals who favored the standard technique, the second group used the “kayaking” variant and the third one swam in the “loping” variant. All swimmers were instructed to swim the 50 m freestyle with their technique of choice at maximum velocity. Analysis of kinematic parameters (time, average swimming velocity), swimming cycle parameters (stroke length, stroke rate), and the swimming efficiency coefficient (stroke index) was calculated using SIMI’s 2D Reality Motion Systems software. Results. The Kruskal-Wallis test and Mann-Whitney U test found statistically significant differences in the studied parameters between the standard technique (S) and the “kayaking” (K) and “loping” (L) variants in the time to swim 25 m ( S = 15.472 s, K = 13.540 s, L = 14.108 s), and between (S) and (K) in the 15 m swim time ( St = 9.598 s, Kt = 8.593 s) and average swimming velocity ( Sv = 1.562 m/s, Kv = 1.757 m/s). Conclusions. Analysis of the differences in the kinematic parameters that define front crawl swimming technique finds justification in the need to modify the standard technique of the propulsive movement used in swimming towards those that employ the “kayaking” and “loping” variants as they are more effective in affecting swimming velocity.
机译：目的。这项研究的目的是分析标准的前爬网游泳技术及其变体“皮划艇”和“俯卧”的选定运动学参数，以便估计可以确定游泳有效性和效率方法的差异。 18名游泳者（平均分为三组）参加了研究。第一组由赞成标准技术的个人组成，第二组使用“皮划艇”变体，第三组使用“倾斜”变体游泳。指导所有游泳者自由泳50 m自由泳。运动量参数（时间，平均游泳速度），游泳周期参数（冲程长度，冲程频率）和游泳效率系数（冲程指数）的分析是使用SIMI的2D Reality Motion Systems软件计算的。结果。 Kruskal-Wallis检验和Mann-Whitney U检验发现标准技术（S）与“皮划艇”（K）和“倾斜”（L）变体在25 m的游泳时间之间的研究参数具有统计学上的显着差异（ S = 15.472 s，K = 13.540 s，L = 14.108 s），并且在15 m游泳时间（St = 9.598 s，Kt = 8.593 s）和平均游泳速度（Sv = 1.562）之间在（S）和（K）之间m / s，Kv = 1.757 m / s）。结论。对定义前爬泳游泳技术的运动学参数的差异进行分析发现，有理由需要将游泳中使用的推进运动的标准技术向采用“皮划艇”和“倾斜”变体的人进行修改，因为它们在游泳中更有效。影响游泳速度。

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