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.
Double and single stance testing conditions. (a) double-legged stance, feet shoulder width apart with hands rested on the hips; (b) single-legged stance (the nonstance extremity was standardized in a position of 30° of hip flexion and 90° of knee flexion, with the ankle relaxed).
