Nicolau G Y
Endocrinologie. 1977 Jan-Mar;15(1):19-25.
Variation of the adrenal RNA as a reaction to standard physical effort--30 min. of swimming daily for 5 successive days-was studied on adult male white Wistar rats in relation to the season and the hour at which the physical effort was made. The relationship between the seasonal variation and the adrenal adaptation response to swimming was followed up in the interval between March 1972 and December 1974; the circadian variation was examined at 0600, 1200, 1800 and 0000. 1. The circannual differentiation in the response to effort is expressed in the increase of the adrenal RNA concentration, statistically non-significant in spring, maximum in summer and statistically significant in autumn; in winter, the RNA concentration, by its significant decrease as against the controls, expresses an inversion of the adrenal response to effort. 2. Within a 24-hour period the increase in the adrenal RNA concentration under effort is maximum at 1800 and generally higher at night. The fundamental chronobiologic structure of the species seems to interfere significantly the adrenal adaptation to physical effort.
研究了成年雄性白色Wistar大鼠肾上腺RNA对标准体力活动（连续5天每天游泳30分钟）的反应变化，并将其与季节以及进行体力活动的时间相关联。在1972年3月至1974年12月期间追踪了季节变化与肾上腺对游泳的适应性反应之间的关系；在0600、1200、1800和0000时间点研究了昼夜变化。1. 对体力活动反应的年度周期性差异表现为肾上腺RNA浓度升高，春季无统计学显著差异，夏季最高，秋季有统计学显著差异；冬季，RNA浓度与对照组相比显著降低，表明肾上腺对体力活动的反应发生了反转。2. 在24小时内，体力活动时肾上腺RNA浓度的升高在1800时最大，且夜间总体较高。该物种的基本生物钟结构似乎对肾上腺对体力活动的适应性有显著影响。
