Core temperature and hydration status during an Ironman triathlon
Core temperature and hydration status during an Ironman triathlon
复制标题
铁人三项赛期间的核心温度和水合状态
DOI：
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发表时间：
2006
影响因子：
18.4
通讯作者：
David Bishop
中科院分区：
文献类型：
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作者：
P. Laursen;Rob Suriano;M. Quod;Hamilton Lee;C. Abbiss;Kazunori Nosaka;David T. Martin;David Bishop
背景：大量基于实验室的研究证明，需要积极的补水策略(∼1-2升/小时)，以最大限度地减少核心温度的上升，并将体温过高对性能的有害影响降至最低。然而，关于水合程度、核心体温和运动成绩之间关系的现场数据很少。目的：测定铁人三项运动员在226公里铁人三项比赛中的核心温度(Tcore)，并与赛后水分状况指标进行比较。方法：对10名训练有素的铁人三项运动员在2004年西澳铁人三项比赛前和比赛后即刻(平均环境温度23.3°C(19-26°C)，相对湿度60(14)%(44-87%))、血浆钠([Na+])、钾([K+])、氯([Cl−])及尿比重进行测定。在活动期间，使用可摄入药丸遥测系统间歇性地测量Tcore，并在整个过程中测量心率。结果：铁人三项平均成绩(SD)为611(49)分钟，心率为143(9)次/分(最大心率的6%)，Tcore为38·1(0·3)°C，体重下降2·3 kg(−3.0(1·5)%；P<；0·05)，尿比重显著增加(1.011(0.005)~1.0170(0.008)g/ml；P<；血浆[Na+]、[K+]、[Cl−]无明显变化。体重的变化与运动后Tcore(r = −0.16)、血浆[Na+](r = 0.31)或尿比重(r = −0.37)无关。结论：与以往实验室研究水分不足对成绩影响的研究不同，训练有素的铁人三项运动员在温暖的条件下可以忍受高达3%的体重损失，而没有任何体温调节失败的证据。
Background: Numerous laboratory based studies have documented that aggressive hydration strategies (∼1–2 litres/h) are required to minimise a rise in core temperature and minimise the deleterious effects of hyperthermia on performance. However, field data on the relations between hydration level, core body temperature, and performance are rare. Objective: To measure core temperature (Tcore) in triathletes during a 226 km Ironman triathlon, and to compare Tcore with markers of hydration status after the event. Method: Before and immediately after the 2004 Ironman Western Australia event (mean (SD) ambient temperature 23.3 (1.9)°C (range 19–26°C) and 60 (14)% relative humidity (44–87%)) body mass, plasma concentrations of sodium ([Na+]), potassium ([K+]), and chloride ([Cl−]), and urine specific gravity were measured in 10 well trained triathletes. Tcore was measured intermittently during the event using an ingestible pill telemetry system, and heart rate was measured throughout. Results: Mean (SD) performance time in the Ironman triathlon was 611 (49) minutes; heart rate was 143 (9) beats/min (83 (6)% of maximum) and Tcore was 38.1 (0.3)°C. Body mass significantly declined during the race by 2.3 (1.2) kg (−3.0 (1.5)%; p<0.05), whereas urine specific gravity significantly increased (1.011 (0.005) to 1.0170 (0.008) g/ml; p<0.05) and plasma [Na+], [K+], and [Cl−] did not change. Changes in body mass were not related to finishing Tcore (r = −0.16), plasma [Na+] (r = 0.31), or urine specific gravity (r = −0.37). Conclusion: In contrast with previous laboratory based studies examining the influence of hypohydration on performance, a body mass loss of up to 3% was found to be tolerated by well trained triathletes during an Ironman competition in warm conditions without any evidence of thermoregulatory failure.
对正在进行高渗脱水的大学摔跤手进行水合测试。
影响因子：
4.1
作者：
Bartok,Cynthia;Schoeller,DaleA;Sullivan,JudeC;Clark,RRandall;Landry,GregoryL
通讯作者：
Landry,GregoryL