Which term describes the force exerted in a muscle without any change in length or joint angle?

The term that describes the force exerted in a muscle without any change in length or joint angle is isometric. In an isometric contraction, the muscle generates tension while remaining at a fixed length, meaning there is no visible movement of the joint. This type of contraction plays an essential role in stabilizing joints and maintaining posture. It allows for strength building in a specific position without shortening or lengthening the muscle, making it valuable in rehabilitation and functional training settings.

In contrast, concentric contractions involve muscle shortening while generating force and eccentric contractions occur when a muscle lengthens while producing tension. Isotonic contractions refer to a type of muscular contraction that results in movement, either through shortening (concentric) or lengthening (eccentric) of the muscle. Each of these terms captures different aspects of muscle action, but isometric specifically highlights the absence of movement despite force generation.