Your knees take the brunt of the increased demands on your lower body in terms of the amount of muscle mass used and joint flexion when you compare walking to running. By a lot. Why? Because you’re human.
Though humans share a lot of qualities with other mammals, we are unique in terms of posture, locomotion and gait. (In fact, we’re among the only two-legged mammals who walk and run.) For instance, horses consume about the same amount of energy to cover a mile when running or walking, while humans consume substantially more energy when they run than when they walk.
But with our unique patterns of limb kinematics, a group of scientists wanted to study exactly how that affects how we use our muscles while walking and running, and to better understand why it’s more “efficient” to walk than to run.
Mayer Resnick | EurekAlert!
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