Article

Follow-Up Alterations of Catecholamine Hormones after an Intensive Physical Activity

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Abstract

Catecholamines play an important role in a number of bodily functions such as metabolism of carbohydrates and lipids. Any change in the quantity of the hormones has negative effect on the performance of athletes. Fourteen young athletes participated in this study. The participants took Bruce Test and ran on the treadmill with an average of 16.05 minutes and were totally exhausted. Four blood samples were taken. The first sample served as a pretest and the second sample was taken after Bruce test. The third and fourth samples were taken one day and two days after the Bruce test, respectively. The results of the sample tests were analyzed by using paired sample t-test and repeated measures. The results showed that extreme exhaustive aerobic exercises significantly increase Epinephrine (E) (P = 0.0001) and Norepinephrine (NE) (P = 0.01). The results also showed that the increase for norepinephrine continued two days after physical exercise. It seems that Catecholamines react differently to physical exercises and might be influenced by the psychological state of the athlete before the exercise and the duration and intensity of the exercise. The amount of increase in the epinephrine and norepinephrine seem to contribute to the better athletic performance because these two hormones perhaps have a positive effect on cardiovascular system and metabolism.

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... Further, under hypoxic conditions, an increase in the NOS activity leads to increased concentration of NO , which can react with O 2 À and form the strong toxic for cells species ONOO À (Reaction (2)) [63]. Increases in circulating catecholamine hormones (adrenaline, noradrenaline) levels with exhaustive exercise (even 20-fold) may involve ROS formation during catecholamines autoxidation, and their oxidation by ceruloplasmin or with the participation of the transition metal ions [211,212]. The findings published since 1980s maintain that physical exercise at high altitude should be considered as an important source of OS, due to the skeletal muscle contractive activity, relative hypoxia, hyperaemia, and their relatively large mass in comparison with other cells and tissues [194][195][196]. ...
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