Seasonal fatigue and energy shifts explained

Many people experience a significant drop in energy levels during September, often referred to as seasonal fatigue. This phenomenon is linked to reduced daylight, which disrupts the circadian rhythm and melatonin regulation. Experts suggest that morning light exposure can help signal the body to stay alert.

Returning to work after a holiday can also cause exhaustion. The transition from a flexible summer routine to a structured work schedule requires the brain and body to readjust. This adjustment period can last from a few days to over a week, depending on how much the daily routine was altered during the break.

For women over 40, persistent fatigue may be linked to hormonal changes during perimenopause and menopause. Fluctuating levels of estrogen and progesterone can lead to poor sleep quality, night sweats, and daytime tiredness, meaning exhaustion is not always solely due to a lack of sleep hours.