Nature walk beats treadmill for mental refreshment, study finds

This study looked at whether a 30-minute walk outside in a green area helps people recover from mental tiredness and stress better than walking on a treadmill indoors. 80 healthy young adults were split into two groups: one walked outdoors in nature, the other walked indoors in a windowless room. Researchers measured mood, stress hormones, heart rate, and attention to see which environment was more restorative.