Using this yoga roller is easy. For sports massage, just roll it over the sore muscles gently. You can move it back and forth to relieve muscle tension. When doing muscle rehabilitation, use slow and steady movements. For a core body workout, lie on the roller and do some gentle twists and turns. As for precautions, don't use too much force when rolling, especially if you have an injury. Also, keep it away from sharp objects to avoid punctures. To maintain the roller, clean it regularly with a mild soap and water. Let it dry completely before storing it in a cool and dry place.