Vertical COM displacement during normal gait is approximately what?

Vertical COM displacement during normal gait is approximately what?

• A. 10 cm
• B. 1 cm
• C. 20 cm
• D. 5 cm

Answer: (D)

In normal walking, the center of mass moves in a small up-and-down path rather than a large jump. The vertical excursion is about five centimeters from the lowest point to the highest point during a gait cycle. This modest movement helps conserve energy because the leg behaves like an inverted pendulum, allowing energy to be exchanged between potential and kinetic forms as you progress. The ankle, knee, and hip joints, along with pelvic motion, smooth and regulate this rise and fall, aided by tendons and muscles that store and release energy during push-off. Values much smaller (around one centimeter) would make the gait feel rigid and inefficient, while values much larger (ten or twenty centimeters) would waste energy and disrupt balance. So the typical vertical displacement is roughly five centimeters, with some variation based on speed, leg length, and individual differences.

In normal walking, the center of mass moves in a small up-and-down path rather than a large jump. The vertical excursion is about five centimeters from the lowest point to the highest point during a gait cycle. This modest movement helps conserve energy because the leg behaves like an inverted pendulum, allowing energy to be exchanged between potential and kinetic forms as you progress. The ankle, knee, and hip joints, along with pelvic motion, smooth and regulate this rise and fall, aided by tendons and muscles that store and release energy during push-off. Values much smaller (around one centimeter) would make the gait feel rigid and inefficient, while values much larger (ten or twenty centimeters) would waste energy and disrupt balance. So the typical vertical displacement is roughly five centimeters, with some variation based on speed, leg length, and individual differences.