Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Net metabolic rate for three terrain conditions. Metabolic rates are normalized by subject mass. Values shown are means over subjects, with error bars indicating standard deviations. Asterisk indicates a statistically significant difference between the uneven + foam walking condition and the other two conditions (α=0.05).
