Stability balls, also known as exercise balls or Swiss balls, are large, inflatable spheres used for fitness and rehabilitation. They come in various sizes and are designed to improve balance, core strength, and flexibility. When sitting or exercising on a stability ball, your body engages multiple muscles to maintain stability, making workouts more effective and fun. These versatile tools can be used for a variety of exercises, from simple stretches to more complex movements like planks and crunches. Many people also use stability balls as an alternative to traditional chairs, promoting better posture and reducing back pain during long hours of sitting.