Have a muscle knot you just can’t reach? Lean up against a wall or lie down on the ground and simply press away. Perfect for busting out knots in the back, shoulders, piriformis, legs, and other spots wanting deep pressure. To bust out shoulder knots, stand in an open doorway, place the Tiger Ball against the door frame, press your shoulder into the ball. Suffer from headaches? This is the tool for you. Check out our book “Happy Muscles” to help identify headache-related trigger points.