What term refers to the movement that decreases the angle between two body parts?

The term that refers to the movement that decreases the angle between two body parts is flexion. This occurs when a joint is bent, bringing the two body parts closer together. For instance, when you bend your elbow to bring your forearm closer to your upper arm, you are performing flexion of the elbow joint. This action also applies to various joints in the body, including the knees, hips, and fingers, where the angle decreases as a result of the movement.

Understanding flexion is crucial for those studying anatomy, particularly in contexts like Pilates, where controlling movements and understanding joint mechanics are fundamental in promoting strength and stability while ensuring safety during exercise.