Spring does not have a single symbolic day, but rather a true physiological peak. From an astronomical perspective, the moment of maximum expression of the season falls between late April and mid-May: daylight hours increase rapidly, the average temperature steadily exceeds 18 °C, and the human body enters a phase of metabolic adaptation.
It is precisely during this transition that the proverb “sweet April slumber” originates, often interpreted as simple seasonal laziness. In reality, the explanation is scientific. The lengthening of the days alters the secretion of melatonin and serotonin, hormones that regulate sleep, mood, and energy. For several weeks, the body must recalibrate its circadian rhythm: this is a small physiological stress that can manifest as drowsiness, fatigue, or a need for recovery.
Spring is the season of balance, not excess.
During seasonal transitions, the body faces three main challenges:
- Thermal and climatic variations
- Modulation of the immune system
- Hormonal and metabolic changes
The energetic dimension of spring: from a biological perspective, spring is a season of energetic transition. It is not yet the time of summer expansion, nor is it the time of winter conservation. It is the moment when the body reorganizes its reserves.
Thermal spa treatments, when introduced during this phase, function as a kind of “gentle reset”: they do not force the body, but accompany it through the seasonal transition. For this reason, traditionally, people speak of preventive care, not only therapeutic care.
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