How is step length defined in the context of gait?

Step length is defined as the distance between the heel strike of one foot and the heel strike of the opposite foot. This measurement captures the linear distance covered when one foot completes a step and the other foot begins a new step. Specifically, it reflects the transition from one foot's contact with the ground to the opposing foot's subsequent contact with the ground.

While other definitions involve different types of measurements, the correct choice offers the most precise and widely accepted definition in gait analysis. By focusing on the transition between opposite feet, this definition accurately represents the mechanics of walking and how it involves alternating limb movement.

In contrast, the other options focus on different aspects of gait. One mentions the distance measured from heel strike to toe-off of the same foot, which relates more to the concept of stride length rather than step length. Another option discusses heel strikes of the same foot, contradicting the definition of step length, which must involve opposite feet. The reference to stride length as an average length further describes a different metric that accounts for both feet's movement in conjunction rather than isolating the steps of each foot. Understanding these distinctions is crucial for analyzing gait dynamics effectively.