3 Clinical Trials for Various Conditions
This study proposes to examine multiple aspects of the hypothalamic-pituitary-adrenal axis in younger endurance trained and sedentary men, and in older sedentary men.
Studies have shown that people with certain disorders have an increased risk of developing a condition called Metabolic Syndrome (MS). In this study, the investigators want to learn more about MS among people staying in the hospital for treatment of Major Depressive Disorder (MDD) and also Major Depressive Disorder with Psychotic Features (MDpsy). The investigators also want to learn more about a stress hormone called cortisol that is made in the body. Those who take part in this study will answer some questionnaires, be given some psychiatric interviews, and have some blood taken along with a urine sample. The investigators believe that patients in the hospital with MDpsy will have higher baseline rates of MS factors, cortisol levels, dexamethasone non-suppression, and insulin resistance, compared with MDD alone.
The purpose of this study is to study the effects of sleep restriction on the production of two hormones, cortisol and testosterone. The investigators aim to show that changing these hormones leads to insulin resistance, which is an important cause of type 2 diabetes mellitus. The investigators may also study the effect of sleep restriction on your food intake and cravings, mood, inflammation, metabolism (including bone), and other hormones. Inflammation is your body's response to stress and injury. Bone metabolism is a process of how your body regenerates (renews) new bone cells and removes old bone cells. Hormones are natural substances (materials) that are produced in the body and that influences (effects) the way the body grows or develops.