A warm-up is a preparatory exercise or activity that gets one's body and mind ready for an upcoming event, task, or performance. It can involve physical activities such as stretching, jogging, or jumping rope to increase blood flow and heart rate, as well as mental exercises like visualization or deep breathing techniques to help focus the mind on the task at hand. The purpose of a warm-up is to improve flexibility, mobility, strength, endurance, and overall performance by increasing body temperature, enhancing muscle elasticity, and reducing the risk of injury.