SitTight transforms sitting into an activity that improves your health instead of damaging it. Our unique chair uses your body’s natural ability to balance to increase core strength, improve posture and intensify calorie burn. It is typical for a user to see a 20% increase in their heart rate when using our Balanced Active Sitting™ chair. That equates to a substantial amount of additional calorie burn, all while working uninterrupted at a desk, reading a book or watching TV.