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.
Linear envelope curves for all participants during all conditions. Vertical lines represent the transition from stance phase to swing phase in the overground walking (W) and treadmill walking (T) conditions, and the transition from recovery phase to propulsive phase in the cycling (C) and elliptical training (E) conditions.
