Figure 2.
Joint stretching training exercises. (A) Isometric muscle contraction, (B) wall W-shape posture, (C) prone Y-shape posture, and (D) seated serratus anterior exercise.
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.