A Stability Ball, also known as a Swiss Ball or Exercise Ball, is a large, inflatable ball used for fitness and rehabilitation. It helps improve balance, core strength, and flexibility. People often use it for exercises like sit-ups, push-ups, and stretches, making workouts more engaging and effective. Using a stability ball can also enhance posture when sitting at a desk. Instead of a regular chair, sitting on a stability ball encourages active sitting, which can strengthen the back and abdominal muscles. Many physical therapists recommend it for rehabilitation, helping patients recover from injuries while building strength and stability.