Figure 1.
Illustration of the three positions. Testing was performed in the standard seated position (hip flexion angle = 90°), a greater (120°) and a lower hip flexion angle (60°).
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.