What kind of stretching method involves a stretching machine or the assistance of a friend?

The answer is isostatic stretching, which involves the assistance of a partner or the use of a stretching machine to help the individual achieve a deeper stretch. This method typically includes isometric contractions followed by static stretching. The assistance from another person or a machine allows the communicator to relax into the stretch, increasing both flexibility and range of motion by utilizing the principle of proprioceptive neuromuscular facilitation (PNF). This technique promotes muscle relaxation after contraction, leading to greater muscle elongation.

In contrast, static stretching refers to holding a stretch steadily without any assistance. Dynamic stretching involves moving parts of your body through a full range of motion to prepare for physical activity. Ballistic stretching uses momentum to force muscles beyond their normal range of motion, often leading to a higher risk of injury. Therefore, isostatic stretching is unique in its use of external assistance to enhance the stretching process effectively.