Description from website: The Pettibon System Therapeutic Wobble Chair is a patented solution for back pain relief, balance, and flexibility. With 360° of rotation, 40° of side to side lateral flexion and 35° of front to back flexion and extension, you are able to achieve all possible combinations of exercise motion. As your spinal discs age, they lose internal fluid content and pressure. This can increase your likelihood of back pain and tight or sore muscles. The Therapeutic Wobble Chair rehydrates spinal discs, stretches tight muscles, and improves lumbar disc mobility, nutrition delivery, and waste elimination. Designed with a unique pivot point, the Therapeutic Wobble Chair allows for a full range of motion that you can’t achieve with inflatable balls or discs. Great for at home or at the office and an excellent warm-up tool, especially if you have been sitting all day or before beginning any activity. Use the chair for just 5-8 minutes every day with our provided exercises for best results, and find additional exercises on the Pettibon System website.