Sunlight and hiking reset your internal clock, study finds

This study looked at how daylight and physical activity influence the body's internal clock and sleep quality. Fifty-one healthy adults aged 18-35 spent time under different lighting conditions (office light, natural daylight, and daylight with blue-blocking glasses) while either resting or hiking for 4 hours. Researchers measured changes in melatonin levels and brain activity during sleep to understand how these factors shift the body's natural rhythms.