Do you really know? Why are you exhausted after a day in the sun?
Jul 21, 2025
Spending a day in the sun can leave you feeling surprisingly drained. Explore how your body works overtime to regulate temperature, even while you're lounging. Discover the surprising effects of heat and humidity on your energy levels, and learn practical tips for safe sun exposure. Plus, find out why sunlight is crucial for vitamin D production, making your sun-filled days not just relaxing but also beneficial—if done right!
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Sun Exposure Drains Energy
- After a day in the sun, you feel drained because your body works hard to maintain core temperature around 37°C.
- Heat, humidity, and sweating effort burn energy internally like doing cardio without movement.
Ideal Body Temperature Range
- Our bodies comfortably function between 17°C and 23°C outside temperature.
- Above this range, body systems work harder to adapt, causing fatigue during rising summer heat.
Smart Sun Exposure Tips
- Avoid peak sun hours between 10am and 2pm and stay hydrated to help your body manage heat.
- Use sunscreen, wear a hat, and remember a tan signals your skin’s defense response, not harmless glow.