What is the type of stretching that involves actively moving muscles without holding them in one position?

Dynamic stretching is a form of stretching that involves actively engaging muscles through movement, which helps to increase flexibility and prepare the body for physical activities. This approach typically includes a series of controlled movements that take joints and muscles through their full range of motion, making it particularly effective for warming up before exercise or sports. It emphasizes continuous movement rather than holding a stretch, which can enhance blood flow and muscle temperature, thus reducing the risk of injury.

Static stretching involves holding a muscle in a fixed position for a period of time and is often used for cooling down after activities rather than warming up. Passive stretching relies on an external force or another person to help stretch the muscles without the individual exerting effort. Ballistic stretching incorporates rapid or bouncing movements to push the muscles beyond their normal range, which can sometimes lead to injury if not done carefully.

In summary, dynamic stretching's focus on active movement aligns with the question's criteria, making it the correct answer.