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首页> 外文期刊>Journal of sports sciences. >The effect of critical speed and exercise intensity on stroke phase duration and bilateral asymmetry in 200-m front crawl swimming.
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The effect of critical speed and exercise intensity on stroke phase duration and bilateral asymmetry in 200-m front crawl swimming.

机译:极限速度和运动强度对200 m前爬网游泳中风阶段持续时间和双侧不对称性的影响。

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摘要

The main aim of this study was to determine the absolute temporal relationship between the power and recovery phases of the stroke cycle in front crawl swimming in response to progressive changes in exercise intensity that occurred before and after critical speed. A second objective was to determine whether intensity-related changes in the power/recovery phase relationship affects the bilateral symmetry of the stroke. Stroke parameters were recorded for each 25-m length during a progressive 200-m interval training set, in which eight (2 males, 6 females) national-level swimmers swam at intensities below, above, and at critical speed. The results demonstrated that substantial increases in stroke rate (P < 0.01) occurred at critical speed, and that these increases were related to a greater decrease in the duration of the power phase than the recovery phase (P < 0.01). The results also show that the degree of bilateral asymmetry was greater for the power phase than the recovery phase, and was inversely related to intensity in both phases of the stroke cycle. The findings of this study suggest that critical speed-related increases in stroke rate are an indirect consequence of increased force production in the power phase of the stroke, and that bilateral asymmetry is both intensity- and stroke-phase dependent.
机译:这项研究的主要目的是确定前爬网游泳的力量和恢复阶段之间的绝对时间关系,以响应临界速度之前和之后运动强度的逐步变化。第二个目的是确定功率/恢复相位关系中与强度有关的变化是否影响中风的双侧对称性。在200米的渐进式训练中,每25米长记录一次中风参数,其中八名(2名男性,6名女性)国家级游泳者以低于,高于和临界速度的强度游泳。结果表明,在临界速度下,冲程频率显着增加(P <0.01),并且这些增加与动力阶段持续时间比恢复阶段更大(P <0.01)有关。结果还表明,功率阶段的双侧不对称程度大于恢复阶段,并且与卒中周期两个阶段的强度成反比。这项研究的发现表明,与速度相关的临界速度增加是卒中功率阶段力产生增加的间接结果,并且双侧不对称性与强度和卒中阶段有关。

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