Figure 2.

Bland–Altman plot for stride length, stride velocity, and shank vertical displacement estimated by (a) the proposed method and (b) the previous method²⁰ for 283 strides under the normal speed task ($\circ$) and 412 strides under the slower speed task (+). The Bland–Altman plot provides information about the mean difference, which indicates the bias between two systems, and the 95% confidence interval, which is known as the limit of agreement (LOA) that shows the difference between the values measured by two systems for most individuals²⁷.