What is an example of an exercise designed to maintain muscle strength without moving body parts?

Isometric exercises are specifically designed to maintain muscle strength without generating movement in the joints. These exercises involve tensing the muscles against an immovable object or creating tension without changing the length of the muscle. For instance, performing a wall sit or engaging the core while holding a plank position are common examples of isometric exercises.

These exercises are particularly useful for strength training in situations where movement might aggravate an injury or for individuals who may have limitations preventing movement of certain body parts. By focusing on muscle engagement and contraction without movement, isometric exercises can effectively target and strengthen specific muscle groups while minimizing strain on the joints.

The other options involve some form of movement or dynamic activity. Jogging and cardio exercises require the body to move through space, and stretching exercises typically involve lengthening muscles while also allowing for some degree of movement. Therefore, isometric exercises distinctly stand out as the option that meets the criteria of maintaining muscle strength without movement.