What happens to tendons if movement is restricted or immobilized?

• A. Tendons can become contracted
• B. Tendons become longer
• C. Tendons become more elastic
• D. Tendons strengthen spontaneously

Answer: (A)

When movement is restricted, tendons lose the regular tensile stimulus that helps keep them long and pliable. Without regular loading, the collagen in tendons remodels in a way that makes the tissue stiffer and less extensible, and adhesions can form around the tendon or within its sheath. Over time this can shorten the tendon and reduce its ability to stretch, leading to a contracture. This is why immobilization doesn’t lengthen or strengthen tendons spontaneously; it tends to make them shorter and less flexible. Restoring movement and gradually loading the tendon helps regain length and function.