Foam rollers are cylindrical tools typically used for self-myofascial release (SMR), a form of self-massage that targets tight muscles and fascia to improve flexibility, reduce muscle tension, and alleviate soreness. They are commonly used by athletes, fitness enthusiasts, and individuals seeking relief from muscle tightness or discomfort. Foam rolling involves applying pressure to specific areas of the body using the roller, allowing the muscles to release tension and improve mobility. It can be performed as part of a warm-up or cool-down routine.