Walking vs. Running: Which one is more efficient?  Running use more energy than walking Running have higher energetic cost and oxygen consumption. Any territorial animals shows higher oxygen consumption as increase speed regardless of body size. Higher oscillation contribute for increasing energetic cost During walking, the pendulum movement of legs is determined by action of gravity force on mass center and have lower vertical oscillation; thus, minimizing energy cost. Running have higher oscillation on gravity center on the vertical plane, so it is result in larger energy expenditure. Faster walking is less efficient than running same distance At relatively high speed, oxygen intake during walking exceed oxygen intake during running. Springs and tendon is effective way to save energy for running, but not for walking. Walking lacks muscle contraction and exert less force with high metabolic rate Legs cannot sustain and strain energy which is gained in the initial impact and not much power to push off the ground.

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