Moderate levels of hypohydration impairs bowling accuracy but not bowling velocity in skilled cricket players
Moderate levels of hypohydration impairs bowling accuracy but not bowling velocity in skilled cricket players
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DOI：
10.1016/s1440-2440(01)80028-1
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发表时间：
2001-06-01
影响因子：
4
通讯作者：
Hawley, JA
中科院分区：
文献类型：
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作者：
Devlin, LH;Fraser, SF;Hawley, JA
在7名中速保龄球运动员中研究了运动引起的水分不足对板球保龄球运动技能表现的影响，他们随机进行了两次实验。试验包括保龄球测试（36次分娩;临产前）处于热中性状态（16 +/- 2摄氏度）的环境中，然后在加热的环境中进行类似于1小时的间歇运动（28 +/- 2 ℃）和进一步的热中性保龄球试验（36次分娩; POSTBOWL），在一项试验中限制液体摄入（HYPO），而在另一项试验中，受试者被迫饮水以维持水合正常（EUH）。在所有的保龄球测试中，受试者在板球场上有一个固定的目标，并确定每次投球的路线、长度和速度。通过相似的体重（BM; 89.5 +/- 13.7 vs. 88.9 +/- 13.4 kg）和血红蛋白浓度（EUH和HYPO分别为15.0 +/- 0.8 vs. 14.8 +/- 0.8 g.100 ml（-1））证实了试验前水合状态。HYPO组的BM损失大于EUH组（2.48 +/- 0.58 vs. 0.46 +/- 0.45 kg）。因此，HYPO后所得的水合不足高于EUH（2.78 +/- 0.49 vs. BM的0.47 +/- 0.41%）。然而HYPO对保龄球速度没有影响（102 +/- 4 vs. 105 +/- 8 km.h（-1）），单变量分析显示HYPO后保龄球线（2.9 +/- 0.5 vs. 3.4 +/- 0.6，P < 0.01）和分娩长度（2.9 ± 0.5 vs. 3.4 ± 0.6，P < 0.01）的独立差异。我们得出结论，中度（-2.8%的BM）运动引起的水分不足对最大保龄球速度的影响很小，但对训练有素的受试者的熟练运动表现有不利影响。
The effects of exercise-induced hypohydration on the motor skill performance of cricket bowling was examined in seven medium-fast bowlers, who performed a random order of two experimental trials. Trials consisted of a bowling test (36 deliveries; PREBOWL) in a thermoneutral (16 +/- 2 degreesC) environment followed by similar to1 hr of intermittent exercise in a heated environment (28 +/- 2 degreesC) and a further thermoneutral bowling test (36 deliveries; POSTBOWL), During one trial fluid intake was restricted (HYPO) whereas in the other, subjects were forced to drink in an effort to maintain euhydration (EUH). During all bowling tests subjects were provided with a fixed target on a cricket pitch and the line, length, and velocity of each delivery was determined. Pre-trial hydration status was confirmed by similar body mass (BM; 89.5 +/- 13.7 vs. 88.9 +/- 13.4 kg) and haemoglobin concentration (15.0 +/- 0.8 vs. 14.8 +/- 0.8 g.100 ml(-1) for EUH and HYPO, respectively). BM loss was greater in HYPO than EUH (2.48 +/- 0.58 vs. 0.46 +/- 0.45 kg). Accordingly, the resultant hypohydration was higher after HYPO than EUH (2.78 +/- 0.49 vs. 0.47 +/- 0.41% of BM). Whereas HYPO had no effect on bowling velocity (102 +/- 4 vs. 105 +/- 8 km.h(-1)), univariate analyses revealed independent differences for both bowling line (2.9 +/- 0.5 vs 3.4 +/- 0.6, P < 0.01) and length (2.9 0.5 vs 3.4 0.6, P < 0.01) of delivery after HYPO. We conclude that moderate (-2.8% of BM) exercise-induced hypohydration has minimal effect on maximal bowling velocity, but there is a detrimental effect on skilled motor performance in well-trained subjects.