Joint Actions - Flexion Extension Abduction Adduction Rotation

Joints provide a fulcrum point for muscles to do work. There are six types of joint action:

JOINT ACTION	MOVEMENT DESCRIPTION	EXAMPLE MOVEMENT
Flexion	decreasing joint angle	Biceps Curl
Extension	increasing joint angle	Triceps Extension
Abduction	movement away from body centerline	Lateral Raises (Deltoids)
Adduction	movement toward body centerline	Horizontal Flyes (Pectorals)
Rotation	rotation about and axis	Twisting the Arm
Circumduction	360 degree rotation	Arm circle around