Lac G, Chamoux A
LPPM, Labo Bio B, Les Cézeaux, Université Clermont II, 63177 Aubière Cedex.
Ann Endocrinol (Paris). 2006 Mar;67(1):60-3. doi: 10.1016/s0003-4266(06)72542-2.
Cortisol and testosterone are two hormones whose levels may vary in response to sports or occupational events. We wondered if the circannual rhythm of these hormones could have an influence on such responses or whether changes can always be ascribed to a single cause.
For cortisol, we conducted a cross-sectional study among 102 adult men (mean age 42 years) using saliva samples taken one half hour after awakening. The values were combined over three-month periods corresponding to the four seasons. For testosterone, conclusions were drawn from data reported in the literature.
The mean annual cortisol level was 14.36+/-0.44 nmol/l. There was no significant difference between average and peak values nor between maximal and minimal values. For testosterone, there have been a limited number of studies and it is unclear whether there is a seasonal change. In any case, the amplitude of variations is weak (9.7% between peak and annual average), which is partly ascribable to individual and interindividual variability.
We conclude that there is no seasonal (or circannual) rhythm in cortisol levels to a degree which could interfere with effects resulting from other events. For testosterone, the circannual rhythm may account for 10% of the variation.
皮质醇和睾酮是两种其水平可能会因运动或职业活动而发生变化的激素。我们想知道这些激素的年节律是否会对这类反应产生影响，或者变化是否总能归因于单一原因。
对于皮质醇，我们对102名成年男性（平均年龄42岁）进行了一项横断面研究，使用醒来半小时后采集的唾液样本。这些值按对应四季的三个月时间段进行合并。对于睾酮，结论是从文献报道的数据中得出的。
年平均皮质醇水平为14.36±0.44纳摩尔/升。平均值与峰值之间以及最大值与最小值之间均无显著差异。对于睾酮，相关研究数量有限，尚不清楚是否存在季节性变化。无论如何，变化幅度较小（峰值与年平均值之间为9.7%），这部分可归因于个体间和个体内的变异性。
我们得出结论，皮质醇水平不存在会干扰其他事件所产生影响的季节性（或年节律）。对于睾酮，年节律可能占变化的10%。
