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Transcription
The urinary system's main job is to remove waste from the body. It starts with water absorption from the intestines, which is then transported to the kidney. In the kidney, blood is filtered to remove toxins and waste, which then travel to the bladder and are expelled through the urethra. When running, there is a decrease in blood flow and fluid filtration, leading to a decrease in urine production. Sweating during running can cause dehydration. Runner's high, the feeling of euphoria, is related to the release of endorphins in the adrenal glands of the kidneys. These endorphins inhibit pain signaling, allowing runners to push through fatigue. Now to the urinary system. The urinary system's biggest job is to extract waste from your body. This process actually starts from the water that is pulled from your small and large intestines. The water is absorbed into the bloodstream and transported to your kidney through the renal artery. In the kidney, blood is filtered to take out any toxins and waste. The toxins and waste then travel through your ureters into the bladder to be stored until a mixturation reflex happens. When this happens, all of the stored toxins and waste exit through the urethra. Many may think that nothing happens to the urinary system when running. However, when you're running, there becomes a decrease in blood flow because of the increase in activity of your sympathetic nervous system due to the stress that your body is under. This decrease in blood flow then causes a decrease in fluid filtration, which then also causes a decrease in urine production. The decrease in blood flow happens so that we can maintain our blood pressure as vessels dilate in the working muscles. Another impact that running has on your urinary system is sweating. When you sweat, you can lose a significant amount of fluid. One of the kidney's functions is to reabsorb water to maintain fluid balance. However, the fluid absorbed is not comparable to the amount of fluid lost through sweating. This causes dehydration while running. Something that is intriguing about running is this state of euphoria that people experience called runner's high. Runner's high actually stems from your urinary system. This runner's high is the release of endorphins, like cortisol, in the adrenal glands of the kidneys. These endorphins are activated when your body is in stress and when the sympathetic nervous system is in gear. The endorphins bind to receptors in the nervous system to inhibit the release in proteins involved in pain signaling. This is what is happening when you all of a sudden feel like you can run several more miles after you've finished your workout because your pain receptors are being inhibited. Now I'm passing the mic off to Jonathan.
