ExRx.net > Kinesiology > Articulations > Joint
Bending the joint resulting in a decrease of angle; bringing forearm toward upper arm.
Straightening the joint resulting in an increase of angle; bringing forearm away from upper arm.
Also see Forearm. Mentioned articulations occur during concentric phase of exercise video examples.
Toning with Weights
Weight Training Safety
Periodization for Weight Training
Youth Weightlifting Program
Weight Training Tidbits
Low-Volume, Progressive-Intensity Weight Training