Abstract
AbstractIn this study, the possible effects of exercise on hormonal secretions in some sport branches were investigated on the basis of urinary cyclic nucleotide (cAMP and cGMP) excretion, since it was thought that the total, ultimate effects of secreted hormones, under the effect of exercise stress, may be estimated by means of the changes in the second messenger, cAMP, and cGMP, concentrations in urine. A total of 60 subjects from different sport branches were included in the study, and pre- and post-training urinary cyclic nucleotide levels of them were determined by EIA method. The differences in cAMP and cGMP between pre-training and post-training periods were statistically significant (p < 0.05 for both), with the post-training levels being higher. The increased post-training cyclic nucleotide concentrations in urine showed that a complex hormonal response occurs as a result of both metabolic state and the exercise stress in sporters. It was concluded that the complicated hormonal status of the spor...
Highlights
There are some situations in which the body needs to call on its fuel stores and with which it may have to cope
Since there was no statistical difference in sub-sporting groups with respect to urinary cyclic nucleotide levels, all subjects were taken as one group, and the statistical analyses were made
The statistical analyses of the results obtained showed that the difference in cyclic nucleotides adenosine monophosphate (cAMP) and cGMP between pre-training and post-training periods were statistically significant at the level of p < 0.05 for two parameters (95% CI [(−9.03) − (−5.55)] and [(−3.6) − (−2.4)]), respectively)
Summary
There are some situations in which the body needs to call on its fuel stores and with which it may have to cope. Physical injury, severe infection, strenuous exercise, and starvation can be considered generally as stress. In the case of strenuous exercise, in which the requirement for energy is suddenly increased, more vigorous changes in metabolic regulation take place (Bergström & Hultman, 1972; Cahill et al, 1966; Coyle, 1995; Spurway, 1992). The role of the sympathetic nervous system and adrenal medulla may become dominant, resulting in gradual changes in plasma substrate and hormone concentrations. Other hormones respond to exercise and are involved in the regulation of fuel availability. The increases in adrenaline, glucagon, growth hormone, and cortisol concentrations are typical “stress” responses (Houmard, Cox, MacLean, & Barakat, 2000; Kraemer et al, 2001)
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