In isometric muscle exercises, what happens to the joints?

In isometric muscle exercises, the key feature is that the muscles contract without changing length, which means there is no movement at the joints involved in the exercise. This type of exercise involves exerting force against an immovable object or holding a position, which maintains muscle tension but does not allow for any joint movement. As a result, the correct understanding of how isometric exercises impact the joints is that they do not move during the contraction. This method is effective for building strength and endurance in specific muscle groups without the risk of joint strain or injury that is often associated with dynamic movements.