Resistance bands are elastic cords or flat loops made from latex or fabric that provide progressive resistance as they are stretched. They are lightweight, portable, and joint-friendly, making them ideal for warm-ups, rehabilitation, and travel workouts. Bands come in varying tensions, from light to extra-heavy, and can replicate many cable machine exercises at a fraction of the cost and space. They are also useful for assisted pull-ups and stretching. Because resistance increases as the band stretches, users experience smooth tension throughout the movement, which is helpful for both beginners and advanced trainees.