Why Walking Outdoors Makes You Tired

Why do you feel way more tired after being outside and walking… even if you didn’t

do anything “hard”? It’s not just the fresh air — your body is doing WAY more than you think.

First, when you walk outside, your brain is constantly processing millions of signals:

light, sound, movement, temperature, smells,

and people. Your brain burns 20% of your daily energy just staying alert outdoors.

Second, sunlight triggers your body to release serotonin, which later converts

into melatonin — the hormone that makes you sleepy. Third, walking increases

blood flow, lowers stress hormones, and relaxes your nervous system. Your body literally