why do humans move their arms when they walk
Swinging your arms conserves energy because your arm muscles donât have to do much work when your limbs are swaying. Think of it this wayâyour arm is like a pendulum; when your leg moves, your body moves, and that movement forces the pendulum to sway.Your arms move passively because of this natural motion, meaning your muscles arenât exerting energy to make it happen.They do kick in a little effort to keep the swing in control, Brujin says, but the energy savings from swinging more than offset the tiny amount of energy needed to keep the swing going.tâs a question thatâs long bothered scientists, whose theories included speculation that it was a good-for-nothing practice that we haven't evolved out of. But in 2009, researchers took a closer look to figure out why exactly we flail while we walk.