Stride length refers to the distance covered in one complete step while walking or running. It is measured from the heel of one foot to the heel of the same foot in the next step. Stride length can vary based on factors such as a person's height, leg length, and walking or running speed. In general, a longer stride length can indicate a more efficient gait, allowing for faster movement. However, excessively long strides may lead to injury or strain. Athletes often monitor their stride length to improve performance and reduce the risk of injuries.