At normal comfortable walking speeds, mechanical energy exchange recovers approximately how much energy?

At normal comfortable walking speeds, mechanical energy exchange recovers approximately how much energy?

• A. 10-20%
• B. 60-70%
• C. 30-40%
• D. 90-100%

Answer: (B)

During walking, the body’s center of mass naturally moves up and down, and forward motion can be stored as gravitational potential energy when you rise and then reconverted to kinetic energy as you fall. This back-and-forth exchange behaves like a pendulum, letting a large portion of the mechanical energy be reused rather than requiring fresh muscular work each step. At normal comfortable walking speeds, about 60–70% of the energy fluctuations can be recovered through this exchange. The remaining energy is lost to factors like impact, damping, and muscular co-contraction, so the recovery isn’t near 100%.

During walking, the body’s center of mass naturally moves up and down, and forward motion can be stored as gravitational potential energy when you rise and then reconverted to kinetic energy as you fall. This back-and-forth exchange behaves like a pendulum, letting a large portion of the mechanical energy be reused rather than requiring fresh muscular work each step. At normal comfortable walking speeds, about 60–70% of the energy fluctuations can be recovered through this exchange. The remaining energy is lost to factors like impact, damping, and muscular co-contraction, so the recovery isn’t near 100%.