Deligiannis A, Karamouzis M, Kouidi E, Mougios V, Kallaras C
Laboratory of Sports Medicine, Aristotle University, Thessaloniki, Greece.
Br J Sports Med. 1993 Dec;27(4):247-50. doi: 10.1136/bjsm.27.4.247.
The acute effect of 30-min swimming at a moderate speed, at three water temperatures (20, 26 and 32 degrees C) on plasma thyroid stimulating hormone (TSH), free thyroxine (F.T4), triiodothyronine (T3) and cortisol concentrations was studied in 15 élite male swimmers. Blood was sampled before and immediately after the events. The heart rate, which was continuously monitored during exercise, had the highest response at 32 degrees C and the lowest at 20 degrees C. Blood lactate concentrations were found to be similar after the three tests. Plasma TSH and F.T4 were found to be significantly increased (by 90.4% and 45.7% respectively) after swimming at 20 degrees C, decreased at 32 degrees C (by 22.3% and 10.1% respectively) and unchanged at 26 degrees C. Exercise at these three water temperatures did not significantly affect T3. Finally, plasma cortisol was found to be increased after swimming at 32 degrees C (by 82.8%) and 26 degrees C (by 46.9%), but decreased at 20 degrees C (by 6.1%).
在15名优秀男性游泳运动员中，研究了在三种水温（20、26和32摄氏度）下以中等速度进行30分钟游泳对血浆促甲状腺激素（TSH）、游离甲状腺素（F.T4）、三碘甲状腺原氨酸（T3）和皮质醇浓度的急性影响。在运动前后采集血样。运动期间持续监测心率，其在32摄氏度时反应最高，在20摄氏度时最低。发现三项测试后血乳酸浓度相似。发现血浆TSH和F.T4在20摄氏度游泳后显著升高（分别升高90.4%和45.7%），在32摄氏度时降低（分别降低22.3%和10.1%），在26摄氏度时无变化。在这三种水温下运动对T3无显著影响。最后，发现血浆皮质醇在32摄氏度（升高82.8%）和26摄氏度（升高46.9%）游泳后升高，但在20摄氏度时降低（降低6.1%）。
