Acute stress vs chronic stress: when stress stops being an ally

Stress is not an enemy; it is a survival mechanism that makes us more alert, attentive, and reactive. It becomes a problem when it doesn't turn off anymore. Understanding the difference between acute and chronic stress, and the role of cortisol, helps to recognize when this ally turns into a burden.

In the face of a challenge, the body activates an adaptation response in a matter of seconds. The sympathetic nervous system releases adrenaline, the heart speeds up, breathing becomes faster, muscles receive more blood, and the mind focuses. Shortly after, the hypothalamic-pituitary-adrenal axis comes into play, prompting the adrenal glands to produce cortisol. It is an ancient and valuable response that helped our ancestors escape danger and today helps us face an exam, a deadline, or a competition.

The key point is that this natural response is meant to be short-lived. Once the challenge is over, the body should return to balance, recover, and regenerate.

Eustress and distress: two sides of the same mechanism

Endocrinologist Hans Selye, a pioneer in stress studies, distinguished two forms: eustress is the "good" stress, stimulating, time-limited, perceived as a challenge within our reach, while distress is the "bad" stress, experienced as a threat, excessive, or with no way out. What makes the difference is not just the event, but how we perceive it and how long it lasts. The same job interview can energize one person and wear another out.

	Eustress	Distress
Perception	Manageable challenge	Threat or overload
Duration	Short, with a beginning and an end	Prolonged or recurring
Effects	Motivation, concentration, energy	Anxiety, fatigue, decreased performance
Examples	A race, a new project, a trip	Constant pressure, conflicts, sleepless nights

 

Psychology describes it with the Yerkes-Dodson curve; up to a certain level, stress improves performance, beyond that threshold, it worsens it.

Cortisol: essential, but only at the right time

Cortisol is often called the "stress hormone," but it is primarily a hormone of daily life, mobilizing sugars and fats as fuel, modulating inflammation, supporting blood pressure, and regulating the sleep-wake cycle.

In healthy conditions, it follows a precise circadian rhythm, peaking shortly after waking to help us activate, then gradually decreasing throughout the day to its lowest levels at night, when the body can rest and regenerate.

In a situation of acute stress, cortisol rises, does its job, and returns to baseline levels. With chronic stress, this rhythm is disrupted; levels may remain high even in the evening, or after long periods of overload, the curve may flatten. In both cases, the body loses its natural alternation between activation and recovery.

Acute stress lasts minutes, hours, or a few days and resolves; chronic stress is a tension that drags on for weeks or months, without real recovery breaks. This is where the mechanism designed to protect us begins to wear us down.

Some signals that deserve attention:

• Disturbed sleep: difficulty falling asleep, nighttime awakenings, feeling like never really resting.
• Persistent fatigue: waking up already tired and energy dropping early in the day.
• Weaker defenses: more frequent colds and minor ailments.
• Declining concentration and memory: struggling to stay focused, forgetfulness.
• Unstable mood: irritability, anxiety, lower tolerance for frustration.
• Physical signals: muscle tension, headaches, digestive issues, changes in appetite.

In the long term, chronic stress is associated with a higher risk of hypertension, blood sugar alterations, abdominal fat accumulation, and anxiety and mood disorders. If symptoms persist or become debilitating, it is important to discuss them with your doctor.

Restoring balance: recovery is key

The goal is not to eliminate stress but to restore its natural rhythm: activation when needed, recovery right after. Some habits help achieve this.

• Protecting sleep: regular hours, dark and quiet room, screens away before sleeping. It is during nighttime rest that cortisol decreases and the body regenerates.
• Moving every day: moderate physical activity helps "release" accumulated tension.
• Breathing calmly: a few minutes of slow breathing or meditation activate the parasympathetic system, the relaxation one.
• Being in nature: a walk in green spaces promotes relaxation and disconnects the mind from digital stimuli.
• Creating real breaks: moments without notifications, relationships that recharge, time for what we enjoy.

Listening to the body's signals and allowing for real recovery is the best way to ensure that stress remains what it should be: an ally that helps us face challenges, not a burden that accompanies us every day. And since recovery starts at night, discover LifeBion, the device with magma13 technology designed to support your rest and help you regain truly restorative sleep.

This article is for informational purposes and does not replace medical advice.

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