system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it more tiring to stand than to walk?
gpt
When you're standing you're not actually resting. Your muscles are constantly making small adjustments with your ankles as the pivot point in order to stop you from falling on your face. Each adjustment isn't very intensive but it does this *alot*.Not only are your muscles doing this work constantly, it's only a small group of them (mainly the calves), which causes them to tire. In comparison walking uses far more muscles and basically spreads the fatigue around. As well walking doesn't work those muscles constantly, on average as you move those muscles are resting about half the time as you move from one foot to the other.