Walking faster than 1.33 m/s affects energy cost by doing what?

Walking faster than 1.33 m/s affects energy cost by doing what?

• A. Increases it
• B. Decreases it
• C. Eliminates it
• D. Has no effect

Answer: (A)

Energy cost for walking isn’t the same at all speeds; there’s a speed at which it’s minimized. For walking, that optimal energy-per-distance point is around 1.3 m/s. Going faster than that means you must supply more metabolic energy per meter traveled—your muscles work harder each step, propulsion and swing become more demanding, and oxygen use per meter rises. So walking faster than 1.33 m/s increases the energy cost.

Energy cost for walking isn’t the same at all speeds; there’s a speed at which it’s minimized. For walking, that optimal energy-per-distance point is around 1.3 m/s. Going faster than that means you must supply more metabolic energy per meter traveled—your muscles work harder each step, propulsion and swing become more demanding, and oxygen use per meter rises. So walking faster than 1.33 m/s increases the energy cost.