Yes, you're missing a face," they say of someone who is either sick or very scared.In both cases, there's a telltale sign—pallor.The feeling of fear triggers this response because the body goes into a "hit or run" situation. A person turns pale with intense fear because blood drains from the cheeks because it has to do more urgent work.This process occurs reflexively, resulting in a rapid heartbeat and equally rapid breathing. At rest, the human heart beats 70-80 times per minute, pumping blood that carries oxygen and nutrients to cells.If you start strength training, your muscles begin to work harder.To increase physical activity, the body requires more energy, so muscle cells increase their demand for nutrients and oxygen. "Beat or Run" When a feeling of fear occurs, the body prepares for sudden muscle activity.This situation is called "hit or run."The central nervous system, in turn, sends signals to the hypothalamus. Hypothalamus functions: • controls the autonomic nervous system and the endocrine system; • maintains a stable internal body environment; • regulates blood circulation, thermoregulation, maintains a suitable body temperature, and is responsible for emotional state, etc. Impulses are sent from the hypothalamus to the brain cells of the adrenal cortex.Furthermore, the hormone adrenaline, also known as the "anxiety hormone," is secreted into the blood by these glands. Hormonal alarm effects: • digestion slows or stops completely; • blood is circulated for the upcoming fight; • blood glucose levels rise; • energy processes intensify; • increases the functional capacity of skeletal muscles; Besides hormonal anxiety and fear (adrenaline), adrenal hormones also release hormonal aggression (noradrenaline).Hormonal anxiety and aggression are closely linked; a person's behavior in stressful situations depends on their ratio. If you want to balance your hormone levels and calm your nervous system, try a simple exercise.The combined action of the sympathetic and parasympathetic nervous systems always yields positive health benefits.You don't need to go to the gym and buy expensive equipment.All you need is your attention and perseverance.