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Naval Special Warfare (NSW) Operators are expected to maintain a high degree of physical readiness requiring continual operational training. The physiological and psychological demands associated with operational training can result in physiological consequences evidenced by hormonal alterations justifying the need for periodized training to maintain or improve physical readiness. This study ex...

The newborn setting of leukocyte telomere length (LTL) likely has important implications for telomere dynamics over the lifespan. However, its determinants are poorly understood. Hormones play an important role during pregnancy and delivery. We hypothesized that exposure to hormones may impact the fetal telomere biology system. To test this hypothesis, cortisol, estradiol, dehydroepiandrosteron...

The physiologic functions of dehydroepiandrosterone sulfate (DS), a precursor of androgens and estrogen and the most abundant steroid in the circulation, are unknown. Nevertheless, numerous studies have shown that low concentrations of DS are correlated with a variety of metabolic and cardiovascular diseases in human beings, and administration of DS to experimental animals is associated with pr...

INTRODUCTION We examined the responsiveness of both cortisol and dehydroepiandrosterone sulfate (DHEAS) to the stress of survival training in military men and evaluated relationships to performance, peritraumatic dissociation, and the subsequent impact of stressful events. METHODS Baseline salivary cortisol samples were self-collected by 19 men at 0900 and 1930 in a free-living (FL) environme...

Intraperitoneal injection of adult male mice with the neuroactive steroid dehydroepiandrosterone sulfate (DHEAS) at 1 and 40 mg/kg caused dose-dependent increases in the concentration of both this compound and its corresponding free steroid DHEA in brain within 1 h of injection. Pretreatment of these animals for 24 h with the steroid sulfatase inhibitor COUMATE at a dose (10 mg/kg, p.o.) shown ...

It has long been recognized that the usual methods for cleavage of steroidal conjugates by strong acids may effect various transformations (1). In an earlier publication (1) one particular alteration, the conversion of a 3&hydroxy-17-ketosteroid to a non-digitonin-precipitable (“a”)-17-ketosteroid’ by standard HCl hydrolysis was studied. This conversion could be avoided by use of the hydrolytic...

Growth hormone (GH) and dehydroepiandrosterone sulfate (DHEAS) secretion decline with advancing age and are associated with the symptoms of aging. Yogic texts claimed that regular practice of yoga may restore and maintain general endocrinological properties in the human body. Objective of the Study. To observe the effect of yogic training for twelve weeks on basal level of GH and DHEAS in middl...

OBJECTIVE A key aspect of the increasingly popular allostatic load (AL) framework is that stressors experienced over the entire life course result in physiological dysregulation. Although core to AL theory, this idea has been little tested, and where it has been tested, the results have been mixed. METHOD The study analyzes the Costa Rican Study on Longevity and Healthy Aging (CRELES), a new,...