Your Body Controls Urination During Healthy Sleep
When awake, you likely have to urinate every two hours or so. If you did that at night, you’d have to wake up from sleep three or four times each night, but for people with healthy sleep and a healthy urinary system, you can sleep eight hours or more without urinating. How does your body manage this?
Many factors contribute to this. First, you’re not consuming additional fluids. All day, you’re drinking water, coffee, tea, soda, and all the fluid in your foods. Second, you’re not as active, so you’re not producing as much waste as your body needs to remove via the kidneys.
However, the most important element is how your body manages the fluids you do have. The amount of urine your body produces is regulated by hormones, including vasopressin, also called antidiuretic hormone (ADH). During sleep, your brain produces high levels of ADH, causing your kidneys to preserve water and produce less urine.