The words safe and unstable don’t usually go together. But the makers of INDO Yoga Board describe it as “a safe and user-friendly unstable platform.” The INDO Yoga Board recreates the practice of stand-up paddleboard yoga on dry land. The board rests on top of several discs that give the board its instability. Users must concentrate on their yoga poses in order to stay in balance. This helps improve stability and works the core muscles.