Pakarinen A, Alén M, Häkkinen K, Komi P
Department of Clinical Chemistry, University of Oulu, Finland.
Eur J Appl Physiol Occup Physiol. 1988;57(4):394-8. doi: 10.1007/BF00417982.
The effects of progressive strength training for 24 weeks on maximal strength and pituitary-thyroid function were studied in 21 males during the training and during the following detraining period of 12 weeks. Maximal strength increased greatly (p less than 0.001) in the first 20 weeks, followed by a plateau phase in the last 4 weeks of training. Maximal strength decreased greatly (p less than 0.001) during the detraining period. The concentrations of serum total (T4) and free thyroxine (fT4) decreased (p less than 0.05 and less than 0.01, respectively) during the training period and they rose to pretraining levels during the detraining period. During the most intense training phase (the last 4 weeks) there was a positive correlation between the changes in serum fT4 concentrations and the changes in maximal force (r = 0.56; p less than 0.01). No statistically significant changes occurred in the levels of serum triiodothyronine, thyrotropin or thyroxine binding globulin. The results show that prolonged intensified strength training can slightly decrease the concentrations of serum total and free T4. These small changes cannot have any clinical significance, and even their physiological significance may be only marginal.
对21名男性进行了为期24周的渐进性力量训练，研究其在训练期间以及随后12周的停训期对最大力量和垂体 - 甲状腺功能的影响。在前20周，最大力量大幅增加（p < 0.001），随后在训练的最后4周进入平台期。在停训期，最大力量大幅下降（p < 0.001）。血清总甲状腺素（T4）和游离甲状腺素（fT4）浓度在训练期间下降（分别为p < 0.05和p < 0.01），在停训期回升至训练前水平。在最激烈的训练阶段（最后4周），血清fT4浓度变化与最大力量变化之间存在正相关（r = 0.56；p < 0.01）。血清三碘甲状腺原氨酸、促甲状腺激素或甲状腺素结合球蛋白水平未发生统计学上的显著变化。结果表明，长期强化力量训练可使血清总T4和游离T4浓度略有降低。这些微小变化不具有任何临床意义，甚至其生理意义可能也很微小。
