A Therapy Ball (65cm), also widely known as an exercise ball, stability ball, or Swiss ball, is a large, inflatable, elastic sphere primarily used in physical therapy, fitness training, and rehabilitation. The "65cm" refers to its diameter, making it a commonly recommended size for individuals of average height (typically between 5'7" and 6'1") to ensure proper body alignment during exercises. These balls are made from durable, burst-resistant PVC or similar synthetic materials, designed to safely support significant weight while maintaining their spherical shape. The instability of the therapy ball is its key feature; when used for exercises, it forces the engagement of core muscles to maintain balance and stability. This makes it an exceptionally effective tool for strengthening the core (abdominal and back muscles), improving balance, enhancing posture, and increasing flexibility. Therapy balls are versatile and can be used for a wide range of exercises, including crunches, planks, push-ups, squats, and various stretching routines. In rehabilitation, they are invaluable for gently reintroducing movement, improving proprioception, and strengthening supporting muscles around injured joints. They are also popular as active sitting alternatives in offices, promoting better posture and reducing back pain. The gentle bounce and supportive nature of the ball can also be used for relaxation and stress relief. Easy to inflate and deflate for storage, a Therapy Ball (65cm) is an accessible and effective piece of equipment for holistic body conditioning and recovery.