A balance ball, often referred to as a stability ball or exercise ball, is a large, inflatable sphere used for physical fitness and rehabilitation. Typically made of durable rubber, it comes in various sizes to accommodate different heights and exercises. The ball helps improve core strength, balance, and flexibility by engaging multiple muscle groups during workouts. Incorporating a balance ball into exercise routines can enhance traditional workouts, such as yoga or Pilates, by adding an element of instability. It is also commonly used in physical therapy to aid recovery from injuries by promoting stability and coordination.