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.
Surface EMG signals of the left vastus lateralis (shown as Ch1) and the left rectus femoris (shown as Ch2) of a fatigued participant, compared with those of a participant who did not report fatigue. An epoch of 30 s EMG signals is extracted for each 10 s prompted contraction of the thigh, together with 10 s before and after the muscle contraction. The fourth muscle squeeze for the fatigued participant was not performed due to early termination of the head-up tilt test.
