Final answer:
The stretching technique in question is static stretching, which lengthens the muscle while keeping one attachment site stable by using the natural elasticity and extensibility of the muscle.
Step-by-step explanation:
The stretching technique that involves holding one attachment site and elongating the remaining muscle or muscle group is known as static stretching. This technique lengthens the muscle as the tension is diminished, taking advantage of the muscle's elasticity, the ability to stretch and rebound. The endomysium, which is loose and well-hydrated connective tissue covering each muscle fiber in a skeletal muscle, plays a role in allowing this type of stretching to occur without injury.
In contrast to isometric muscle contractions, where the muscle tension increases but the muscle length remains the same, static stretching allows muscle length to increase. The ability of a muscle to return to its original length when relaxed is due to its inherent elasticity and extensibility. These properties are crucial for maintaining muscle health and function, and they facilitate the stretching process.