 People with generalized anxiety disorder, or GAD, are characterized by constant stress or excessive anxiety. When something stressful happens, the brain releases cortisol and adrenaline, causing the muscles to prepare to fight off the stressor or run away from it. This is otherwise known as a sympathetic nervous system response, or the fight or flight reflex. People with GAD have fight or flight constantly running on the back burner. Each of the following points is a result of that reflex. Restlessness and fidgeting. This is more the flight than the fight response. The muscles and brain are ready to go, but there's nothing to run from. This is why doctors say that regular exercise alleviates symptoms of anxiety, because people are using all their pent-up GO hormones in their bodies to actually go. Some people find it helpful to have a small object to occupy their hands, like a scrap of paper to fold and tear. This way the hands are kept busy and prevented from harmful fidgeting habits like chewing or picking at their fingers. Lack of energy or rapid fatigue. The flip side of your body constantly being ready to run or fight is that it's truly exhausting. For example, if you were to tense every muscle possible in your body right now and hold it for the rest of forever, you'd get exhausted pretty quick. When all your energy is going towards something that could require an immediate response, then everyday tasks like getting up to turn off the lights seem much more tiring. Irritable bowels, acid reflux, nausea, or other stomach ailments. The first thought is probably you. But if you think about it, this makes a lot of sense. People can't run long distances or perform heavy workouts with a full stomach or that leads to cramps. So this is your body attempting to rush the job of digestion so that it can allow for a fight and make your body lighter and more aerodynamic, which makes fleeing easier. Trouble falling asleep or staying asleep. This one is pretty simple. If you're in one place for too long, the danger could catch up to you. Your body, however, doesn't realize that there isn't actually any danger. So if you stay awake or only sleep short periods of time, it's safer. Unfortunately, this system is a nasty cycle. You get anxious so you can't sleep, which leads to even more stress on your mind and body, which makes it even harder to sleep, and so on. Hyperventilation. Muscles processing more energy require more oxygen to keep up the exertion. So breathing quickly would help to maximize oxygen intake. The challenge occurs when we over exert this response and the lungs don't have time to pull the oxygen out of the air we breathe before we exhale. That's when oxygen intake decreases and results in that dizzy sensation many people experience during a panic attack. Heart palpitations. Similar to the hyperventilation symptom, heart palpitations happen because the body uses blood to carry oxygen to the muscles. In order to carry the most oxygen fastest to hardworking muscles, the heart has to pump it faster, resulting in palpitations. Clenched jaw or teeth grinding. Your body is ready for action. However, the challenge with anxiety disorders is not knowing what action. So your body responds with tensed muscles like a clenched jaw and teeth grinding. Other common muscle tension responses could be clenched fists, curled toes, tension headache or chronic migraines and neck and shoulder pain. Shaking hands. This is another sign that adrenaline is sending your body's signals to go in a situation when you don't want to go anywhere. This can also be a byproduct of tension due to overexertion of the muscles. Sweating. Sweat is our body's way of cooling off during intense energy exertion. Muscles are burning energy being tensed and ready to go to work, which is generating heat. So the body moderates its temperature by sweating, even when you feel cold. Hot and cold sensations. The fight or flight response excites the body, which causes increased energy flows and creates heat. If the heat generated is intense enough, the body's parasympathetic nervous system is triggered, which creates a relaxation response. However, the body also sweats to cool itself when heat is generated. Coupled with the sudden relaxation courtesy of the parasympathetic system, the body can experience chills because it cools too fast and is not used to the lower core temperature. Anxiety is a state of constant fear due to stressors from your body. This fear was a logical response for a priest or a human who needed to run or scare away predators when in danger, but it can be distracting in today's fast-paced world. The silver lining, though, is that people with anxiety are the ones most prepared for surviving the zombie apocalypse. Do you or someone around you suffer from these symptoms of anxiety? If so, do you have any helpful tips on how to deal with them? Be sure to let us know in the comments section below. If you enjoyed this video, please be sure to follow our social media for more psychology content, and don't forget to subscribe. Thank you for watching, and have a wonderful day.