Do you feel tense from morning to evening, even when nothing serious is happening? You are not alone: in 2024, around 45% of French people say they are suffering psychologically and 76% of employees consider their stress worrying. When this level of alert becomes the norm, we speak of chronic stress.
It’s not the little rush of adrenaline before a meeting that damages your health, but the diffuse threat that never subsides. The stress hormone cortisol normally helps the body deal with an emergency by affecting metabolism, blood sugar and inflammation. When it stays high for too long, the body goes into permanent survival mode. And then everything gets complicated.
Chronic stress: what cortisol does to your body over the months
In situations of danger, the brain activates the fight or flight response, increasing heart rate, blood pressure and the release of cortisol. When this signal is repeated day after day, we speak of allostatic load: the body adapts, but at the cost of progressive exhaustion. The World Health Organization sees this chronic stress as a major factor in cardiovascular and metabolic diseases and anxiety disorders.
In the long term, this overload results in sleep disorders, digestive pain, repeated infections, irritability and difficulty concentrating. There is not yet a single test to measure this level of stress: doctors rely mainly on feelings and, sometimes, on biological measurements such as cortisol in the blood.
Calming the mind: thoughts, meditation and breathing
Studies converge: acting on several simple levers gradually restores margin to the nervous system. First pillar, cognitive-behavioral therapies teach you to identify automatic thoughts that keep you alert, such as “I’m never going to make it.” We confront them with the facts, then we set a concrete objective, for example calling someone or sending this email. You can write down the situation and the thought in a few lines, then reread every weekend what really helped.
Another method, mindfulness meditation and slow breathing. Programs like MBSR show that observing one’s breathing or sensations for a few minutes a day reduces reactivity to stress. An accessible exercise is to inhale through your nose for 4 seconds, exhale for 6, for 5 minutes, three times a day. This cardiac coherence lowers the heart rate and promotes a return to calm.
Get moving, sleep better and set real long-term goals
The body remains a central ally. Moderate physical activity, such as 20 minutes of brisk walking three or four times a week, lowers cortisol, stimulates endorphins and improves sleep, especially if you keep your bedtimes fairly regular. Even when exhausted, starting with some gentle stretches or taking the stairs instead of the elevator already constitutes a safety signal for the body.