Change posture and Hunch forward

Change posture verb - Undergo a change in bodily posture.

Hunch forward and change posture are semantically related. In some cases you can replace term "Hunch forward" with "Change posture", this terms are similar.

Hunch forward verb - Round one's back by bending forward and drawing the shoulders forward.

Change posture and hunch forward are semantically related. You can use "Change posture" instead a verb "Hunch forward".