What does extension in body movements refer to?

Extension in body movements specifically refers to the straightening of a joint or body part, which leads to an increase in the angle between two segments of the body. For example, when you extend your arm, you are straightening it at the elbow, increasing the space between the forearm and the upper arm. This movement contrasts with flexion, where the angle decreases, bringing two points closer together.

Understanding this concept is vital for CNAs, as they often assist patients with mobility and exercises that involve various joint movements. Recognizing the difference between extension and other types of movements, such as shortening, curving, or rotating, is crucial for providing effective care and support.