Table 1. Studies chosen through a review of the literature supplemented with unpublished data available to the authors.

Inclusion criteria include the ability to discern multiple individual values of Embedded ImageO2 at normal walking velocity (1.1–1.5 m/s). We acquired the Embedded ImageO2 data through 3 mechanisms: tables with individual values were presented in the published information, figures in the published sources indicated individual values which could be digitized by us, or the original data were either ours or made available to us. Many authors report only average data or had their walk-subjects walk at velocities other than normal, while some studies provide exemplary data of one individual and averages for all others or included small numbers of subjects. In order to determine the max./min. value, multiple individual data points are necessary.

Table 1.