Effect of pool length on blood lactate, heart rate, and velocity in swimming
Effect of pool length on blood lactate, heart rate, and velocity in swimming
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DOI：
10.1055/s-2006-924505
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发表时间：
2007-05-01
影响因子：
2.5
通讯作者：
Mero, A. A.
中科院分区：
文献类型：
--
作者：
Keskinen, O. P.;Keskinen, K. L.;Mero, A. A.
水中运动测试已被用于跟踪游泳运动员在常规训练期间的条件反射进展。本研究探讨了游泳池长度的影响，在一组5 × 200米自由泳游泳的11名男性游泳运动员的速度从次最大到最大。在25米池和50米池中检测平均游泳速度、血乳酸和心率。在短距离全力游泳过程中，通过水下视频系统（转身前后的速度差）单独测量转身效益作为转身技能的标志。在游泳过程中的最大力量测量系留游泳和腿部伸肌群的爆发力进行了评估，由一个反运动跳跃。在游泳速度与血乳酸曲线的每个点上，发现50米游泳池的血乳酸值显著高于25米游泳池（p = 0.033 - 0.000）。测试后最高乳酸水平为7.36 +/- 1.47 mmol。l（-1）; 8.24 ± 1.55mmol. l（-1）（p = 0.033）。在25米游泳池中，最大游泳速度显著更大（4.5%）（1.38 +/- 0.11 m）。s（-1）vs. 1.32 +/- 0.12 m。s（-1）; p = 0.000）。在所有次最大速度点，短疗程中的心率值显著（p = 0.020 - 0.000）低于长疗程，平均差异为7.3 +/- 0.7 bpm。在短距离和长距离游泳后，心率相等（172 +/- 14 vs. 172 +/- 14 bpm）。在短时间最大游泳中的转向效益为0.12 +/- 0.05 m。s（-1）（8.1 +/-3.2%），与短池和长池游泳之间的最大游泳速度差异呈正相关（r = 0.59; p = 0.029），系留游泳期间的最大力（r = 0.75; p = 0.004）和反向运动跳跃中的垂直跳跃高度（r = 0.55; p = 0.039）。结果表明，在短距离游泳池中，游泳速度越大，游泳池长度对血乳酸浓度和心率的影响越大。
Exercise testing in water has been used to follow the progression of conditioning during regular training in swimmers. The present study examined the effects of pool length in eleven male swimmers on a set of 5 x 200-m freestyle swims with increasing speed from submaximal to maximal. Mean velocity of swimming, blood lactate and heart rate were examined in both 25-m and 50-m pools. Turning benefit as a marker for turning skill was measured separately by a underwater video system (speed difference between pre- and post-turning) during short all-out swims. Maximum force during swimming was measured in tethered swimming and explosive strength of leg extensor muscles was evaluated by a counter movement jump. The significantly higher (p = 0.033 - 0.000) blood lactate values for the 50-m pool as compared to the 25-m pool were found at each point of swimming velocity versus blood lactate curve. The highest post-test lactate level was 7.36 +/- 1.47 mmol . l(-1) in the short course and 8.24 +/- 1.55 mmol . l(-1) (p = 0.033) in the long course. The maximum swimming velocity was significantly greater (4.5 %) in the 25-m pool swimming (1.38 +/- 0.11 m . s(-1) vs. 1.32 +/- 0.12 m . s(-1); p = 0.000). The heart rate values were significantly (p = 0.020 - 0.000) lower in the short course than in the long course at all points of submaximal velocity with a mean difference of 7.3 +/- 0.7 bpm. Heart rate was equal (172 +/- 14 vs. 172 +/- 14 bpm) after the maximum swims in both short and long course. The turning benefit in the short maximum swim was 0.12 +/- 0.05 m . s(-1) (8.1 +/- 3.2%), correlating positively with the difference in maximal swimming velocity between the short and long-pool swims (r = 0.59; p = 0.029), with the maximum force during tethered swimming (r = 0.75; p = 0.004) and with the vertical jumping height in the counter movement jump (r = 0.55; p = 0.039). We conclude that the pool length has a strong effect on blood lactate concentration and heart rate with greater swimming velocity in the short course pool.