We are accustomed to separating body and soul. Health is for the doctor, and mental balance is for the psychologist. But modern science and ancient practices assert the opposite: body and psyche are a unified system. Chronic back pain can be a result of suppressed anger, and depression often starts with lack of sleep and vitamin D deficiency. In this article, we discuss how physical health affects mental peace and vice versa, and what to do to achieve harmony. How the Body Governs Mood Have you noticed: after running or swimming, your mood improves? It's not just "endorphins," but a whole cascade of reactions. Physical activity reduces cortisol levels (the stress hormone) and increases sensitivity to dopamine and serotonin. Regular exercise (even a 20-minute walk) reduces anxiety by 30-40%. Conversely, a lack of movement leads to apathy and depression. Not surprisingly, office workers, who sit in front of a computer all day, have a 50% higher risk of mental disorders. Our body is a biochemical laboratory, and its tuning starts with muscles and joints. Sleep — the Foundation of Balance Insomnia not only irritates but also destroys the psyche. During sleep, the brain clears toxins (including beta-amyloid associated with Alzheimer's disease), processes emotions, consolidates memory. Chronic lack of sleep (less than 6 hours a day) increases the risk of depression by 2-3 times. The feedback loop: anxiety prevents sleep, and a lack of sleep intensifies anxiety. Break it through sleep hygiene: a dark, cool room, avoiding gadgets an hour before bedtime, a routine. Physical health begins with night's rest. Nutrition and Mood The gut is called the "second brain." In it, 90% of serotonin — the happiness hormone — is produced. If you eat fast food, sweets, drink alcohol, you disrupt the microbiome. Inflammation in the gut is transmitted to the brain, causing "food depression." Conversely, a diet rich in fiber, vegetables, fermented products (sauerkraut, kefir), omega- ... Read more