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.
Most Common Weight Training Mistakes
Advanced Weight Training Techniques
Weight Plate Barbell Racking Calculator
Workload Adjustment / Rep Performance Calculator
Weight Training Guidelines