Stride is defined as

• A. A single step
• B. The sequence of events in one gait cycle
• C. Two sequential steps
• D. The distance from heel strike to toe off

Answer: (C)

In gait terminology, a stride is the distance covered in one complete gait cycle for a given leg, which equals two steps. A step is from heel strike of one foot to heel strike of the other foot. So from the moment one foot lands, you complete the first step when the opposite foot lands, then a second step back to the original foot landing again—that full sequence is a stride. This is why two sequential steps define a stride.

The other options don’t fit because a single step is only half of a stride, the sequence of events in one gait cycle refers to the entire cycle (which can be viewed as a stride for that leg), and the distance from heel strike to toe off describes only part of a step during stance, not the full stride.