What defines a 'flexion' movement?

A 'flexion' movement is defined as the action of decreasing the angle between two body parts. This typically occurs at joints, and it brings the body parts closer together. For example, when you bend your elbow, the angle between your forearm and upper arm decreases, which illustrates flexion at the elbow joint. Similarly, bending your knee brings your heel closer to your buttock, again decreasing the angle at the knee.

Understanding this movement is crucial in exercise and rehabilitation contexts, as many exercises incorporate flexion, whether it's in the case of movements like bicep curls or knee raises. Recognizing flexion helps in identifying proper form and ensures the intended muscle groups are being effectively engaged during a workout.