Massage balls are small, often round tools designed to relieve muscle tension and promote relaxation. They can be made from various materials, including rubber, foam, or silicone, and come in different sizes and textures. Users can roll the balls over specific areas of the body, such as the back, feet, or shoulders, to target knots and tight muscles. These tools are popular among athletes and individuals seeking relief from stress or discomfort. Massage balls can be used at home, in the office, or during workouts, making them a convenient option for self-care. They are often recommended by physical therapists and fitness trainers for enhancing recovery and flexibility.