Joint Movement Terminology
This page is included in Muscles 101 since muscles and joint actions go hand in hand.
There are 3 axes of rotation in the body, each is associated with a different plane of motion. These planes of motion are a part of basic fitness theory for personal trainers or first year anatomy. Axis of rotation are a part of mechanics, or more specifically, biomechanics. These concepts can often be quite difficult for new personal trainers. Depending on which exam and certification you are taking this concept may not be super crucial to fully comprehend. What is important to know are the specific joint movements and could you demonstrate each if necessary.